Millrose 70660 thread tape
$4.89 at Amazon
Check it on AmazonPrice as of Oct 24, 2026, 5:30 AM EDT
Read the fit detailsTeflon tape vs pipe dope vs putty
Match the sealant to the joint.
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On this page
- Thread sealants and a flange putty
- Thread tape
- Pipe dope
- Plumber’s putty
- Tape, dope and putty side by side
- Find the sealing surface before choosing a sealant
- Plastic fittings can change the answer
- When plumber’s putty belongs under a drain
- Where silicone fits, and what cure time means
- Can you use tape and pipe dope together?
- Apply the chosen material to the right place
- What to check when the joint still leaks
- Where package descriptions need a closer look
- Questions about tape, pipe dope and putty
- How we picked them
- Related guides
Quick answer
Use Millrose 70660 tape or approved pipe dope on tapered water threads. Oatey Stain-Free putty beds compatible drain flanges; silicone seals specified seams. Follow the fixture’s instructions.
Thread sealants and a flange putty
Tape or dope for tapered threads, putty for a drain flange. All three were genuine, new and in stock on Oct 22, 2026, 11:49 AM EDT.
RectorSeal T Plus 2 thread compound
$8.78 at Amazon
Check it on AmazonPrice as of Oct 24, 2026, 5:30 AM EDT
Read the fit details
Oatey Stain-Free putty 31177
$4.54 at Amazon
Check it on AmazonPrice as of Oct 24, 2026, 5:30 AM EDT
Read the fit detailsProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
| Material | Key specs | Pick it if | Skip it if |
|---|---|---|---|
| Millrose 70660 thread tape | 70660, 1/2 in. wide, 260 in. long, PTFE tape | Your water fitting is 1-1/2 inches or smaller, seals at tapered threads and permits PTFE tape. | The fitting is larger than 1-1/2 inches, needs compound, or seals with a washer, ferrule or flange bed. |
| RectorSeal T Plus 2 thread compound | 23631, 1/4 pint brush-top, Non-hardening, PTFE plus fibers | Your tapered thread connection permits this compound and you prefer brush-on application. | You need flange bedding, seam caulk or a replacement gasket. |
| Oatey Stain-Free putty 31177 | Oatey 31177, 9 oz tub, Oil-free, stain-free, Flange bedding | You’re setting a basket strainer, bath waste or drain flange that calls for putty, especially on stone or Corian. | The surface or drain is ABS, the joint is a thread, or the fixture maker specifies silicone or a supplied gasket. |
These materials are not ranked against each other with a spec score. A thread sealant cannot take the place of a flange bedding compound, and a high pressure claim does not make a product right for every fitting.
Millrose 70660 for a dry thread wrap
Two thread sealants and a flange putty: the joint decides, so none of the three is scored.
My call: the 70660 roll is the straightforward choice when you want a dry wrap on a household water connection and the fitting maker allows tape. This 1/2-inch-wide, 260-inch-long roll is for fittings through 1-1/2 inches; Millrose specifies wider tape above that size.
PTFE tape compresses into the spaces between mating pipe threads as the connection tightens. It also lubricates those threads. That helps assembly, but the easier turn can tempt you to overtighten a plastic female fitting. The fitting instructions decide how far to tighten; a freely turning joint is not permission to keep going.
Millrose’s tape instructions call for clean male and female threads, tension on the wrap and no tape hanging past the open end. Wrap in the direction of assembly so the fitting does not peel the tape back. Remove old fragments before a new wrap; a ragged tail inside the pipe is avoidable.
Where it does well
- Dry application without a brush
- Exact 70660 roll size documented by Millrose
What to watch
- Not a drain-flange bedding material
- Fitting maker may restrict tape or layering
Keep the 70660 model number separate from the longer rolls in the Blue Monster range. Millrose sells several widths and lengths. The 260-inch label tells you how much tape is on this spool, while the half-inch width determines its stated fitting-size range. Neither number identifies the thread standard on an adapter.
For plastic, read the fitting maker’s restrictions before the tape label. Spears warns against combining tape and paste on its threaded joints. That warning matters even when both containers separately list the plastic. Product compatibility and permission to layer products are different checks.
The general Blue Monster tape sheet excludes oxygen service and recommends a dedicated gas tape for gas lines. I would keep this blue roll for approved water-thread work rather than use color as evidence of gas approval. A gas connection belongs with a qualified installer who can check its appliance instructions and local requirements.
Keep the roll covered and clean between jobs. Tape contaminated with grit is a poor starting point for a valve connection. Choose the paste instead if the approved joint instructions call for compound, or if you prefer to coat the threads with a brush rather than manage a wrap in a cramped space.
RectorSeal T Plus 2 for brush-on threads
My call: RectorSeal T Plus 2 23631 is the brush-on alternative when the fitting instructions permit a compatible compound. The maker identifies 23631 as a 1/4-pint brush-top can. Its product page is sold in cases, but that case quantity is not the quantity promised by this Amazon listing.
RectorSeal describes T Plus 2 as a non-hardening paste containing PTFE and synthetic fibers. A brush lets you place compound across the threads without wrapping a spool around an installed stub. It remains a thread sealant; the white paste is not plumber’s putty for the underside of a sink drain.
The current data sheet permits immediate service after correct assembly. That is a useful distinction from sealants that need a cure before testing. It does not remove the need to isolate the water, release pressure before disassembly, or test the finished connection. Follow the valve or fixture maker’s isolation instructions first.
Where it does well
- Non-hardening PTFE compound
- Maker permits immediate service after assembly
What to watch
- Needs gloves, eye protection and ventilation
- Not for oxygen or gasket repairs
RectorSeal lists both metal and several plastic piping materials, including PVC, CPVC and ABS. That is the compound maker’s compatibility statement. The fitting system can impose additional limits, especially about using tape underneath. Verify both sides of that decision rather than treating the words ‘plastic pipe’ as an approval for everything under the sink.
Stir the can before use and clean the threads. For pipe up to 1-1/4 inches, RectorSeal directs application to the male threads only. Above 1-1/4 inches, the sheet directs application to both male and female threads. Keep excess compound clear of the pipe opening and follow the fitting’s assembly instructions.
Wear nitrile or neoprene gloves and eye protection, and ventilate the work area as its safety sheet directs. A low-odor product still needs sensible handling. Keep paste off surfaces outside the joint and close the can after use; the brush makes placement easier, not self-cleaning.
Skip T Plus 2 when a gasket, ferrule or flare is supposed to make the seal. Also skip it for oxygen service, which RectorSeal excludes. If a correctly assembled thread joint still leaks, stop adding layers and check the joint with a plumber. No paste can make an incompatible or damaged connection acceptable.
Oatey Stain-Free 31177 for a drain flange
Oatey Stain-Free 31177 is the putty I’d keep beside the tape and the dope, because it covers the flange job neither of them does. Oatey describes its plumber’s putty as a fixture-setting compound for frames, faucets, bath wastes and basket strainers, and says it stays flexible without hardening, shrinking, cracking or crumbling.
The stain-free part is why this tub, not a regular oil-based one. Oatey says it makes a stain-free putty for the natural surfaces in sinks, countertops, strainers and shower bases: granite, marble, quartz, sandstone and Corian. The listing calls the formula oil-free and says it cleans up with soap and water.
Stain-free is not the same as plastic-safe. Oatey’s putty article keeps ABS and ABS-containing blends or layered bases off the list, Stain-Free included. The Amazon listing says “any surface”, so go by Oatey’s article. If the drain body or basin might be ABS, identify it before you roll the putty.
Where it does well
- Oatey lists granite, marble, quartz, sandstone and Corian
- No cure wait before testing the drain
- Stays flexible under the flange
What to watch
- Not for ABS or ABS-containing bases
- Never for threads or pressure joints
- Fixture or appliance instructions can call for silicone or a gasket instead
Putty never goes on threads. It beds the space under a flange, and the washer, gasket and nut below still do their own jobs. Oatey’s article calls for clean, dry surfaces and an unbroken ring, and it lists no cure wait, so you can test the drain as soon as the assembly is tight.
Appliance and fixture instructions come first. InSinkErator’s Badger manual shows putty at the disposer’s sink flange and warns against it anywhere else on the unit. Where a drain arrives with its own gasket, or the tub maker calls for silicone, follow that drawing instead of adding putty out of habit.
The 9 oz tub is enough for a few strainers or drains. Keep the lid on between jobs so it stays workable.
My call: I’ve used Oatey Stain-Free, and it’s the one tub I’d stock for sink and shower flanges in a house with stone tops. Leave it in the drawer for threads, toilet bases and anything ABS.
Tape, dope and putty side by side
The Ahead column names the material that fits the job, rather than a winner for every plumbing connection.
| Material | Typical seal location | Key benefit | Limit | Ahead | Buy |
|---|---|---|---|---|---|
| Millrose 70660 tape | Approved tapered pipe threads | Dry wrap; no liquid cleanup | Fittings through 1-1/2 in.; wider tape above; no oxygen service | A dry wrap on approved water threads through 1-1/2 in. | Check it on Amazon |
| RectorSeal T Plus 2 23631 | Approved tapered pipe threads | Brush-on; remains non-hardening | Chemical and fitting compatibility still matter | A brush-on application where allowed | Check it on Amazon |
| Oatey Stain-Free 31177 | Beneath compatible drain or fixture flanges | Moldable bedding; no cure wait | Not for ABS; never on threads | A flange whose maker calls for putty | Check it on Amazon |
| Kitchen-and-bath silicone | Approved seams or specified flange locations | Forms an adhering flexible bead | Needs preparation and cure; not thread paste | A seam whose maker specifies silicone | Compare seam requirements below |
The useful question is not simply ‘which is stronger?’ Tape and paste work within a threaded connection. Putty fills a bedding space under a flange. Silicone adheres to the surfaces along an approved seam. A product can be effective in its own location and fail when moved to the next one.
Start with the joint drawing in the fixture instructions. If you see a washer compressed against a seat, the sealing surface is already identified. If a bead is shown beneath a drain flange, identify that bedding material separately from the washer or nut underneath. One drain assembly can contain several different connections.
Find the sealing surface before choosing a sealant
Our joint-location map separates four places that are easy to confuse under a sink. It shows function, not a measured cutaway or a universal installation instruction.
Look at a sink drain from above and below. The wide flange meets the basin at the top. A gasket, washer or nut may sit below. Water at the bottom of that assembly does not prove the bottom threads need tape; it can have reached them from a failed flange seal above.
For a supply connection, identify the end type before opening a container. A pipe-thread adapter and a compression nut can look similar once installed. The thread shape or the presence of a nut alone is not enough. Use the fitting’s model, drawing and supplied sealing parts to decide what belongs there.
| What you identify | Question to answer | Decision |
|---|---|---|
| Tapered pipe threads | Does this fitting maker permit tape, this compound, or either? | Use the approved thread treatment |
| Broad flange under a drain rim | What bedding is specified for both flange and basin materials? | Use that bedding only in the shown location |
| A washer or gasket against a seat | Is the sealing part present, sound and correctly positioned? | Correct the sealing part before adding anything |
| An exposed fixture seam | What caulk and preparation does the fixture maker specify? | Prepare the surfaces and follow that cure schedule |
Plastic fittings can change the answer
A tape label or compound compatibility list does not replace instructions for the actual fitting system.
| Maker guidance | What it permits or warns about | What to do with that rule |
|---|---|---|
| Millrose Blue Monster tape sheet | Lists several plastics among compatible thread materials | Check the fitting system before using the tape |
| RectorSeal T Plus 2 sheet | Lists PVC, CPVC and ABS among compatible materials | Check the fluid and fitting instructions too |
| Spears threaded-joint guidance | Do not combine tape and paste | Keep a one-product method where Spears requires it |
| Oatey general thread guidance | Some named tape-and-compound combinations are allowed | Do not extend general advice to a fitting that forbids it |
The conflict is practical. A sealant maker can approve its chemistry for PVC while the PVC fitting maker restricts how a threaded joint is assembled. Both statements can be true. Read ‘compatible with PVC’ as a material check, then read the fitting instructions as the assembly check.
Spears explains that too much tape can enlarge the male thread build-up and stress a plastic female fitting. Its warning against a tape-and-paste combination is specific. Do not try to settle that conflict by choosing whichever video uses the most sealant. The maker of your fitting defines the joint you are assembling.
For an unknown plastic adapter, stop until you identify it. Spears distinguishes tapered pipe-thread joints from its straight-thread or gasket-sealed adapter connections. Those designs have different assembly requirements. Use the exact adapter’s instructions rather than transferring a tape method from a different connection in the same system.
My call: if the fitting instructions and sealant instructions cannot both be satisfied, change the plan before assembly. Adding a second sealing product is not a substitute for resolving the disagreement.
When plumber’s putty belongs under a drain
Putty is a bedding compound for compatible fixture locations. Read the drain and basin instructions together.
| Contact surface or location | Putty check | Why it matters |
|---|---|---|
| Granite, marble or another porous surface | Use a permitted stain-free formula if putty is specified | Oil-based putty can stain compatible porous surfaces |
| ABS or an ABS-containing fixture | Oatey excludes its plumber’s putties | Stain-free does not mean ABS-compatible |
| An acrylic tub or shower drain | Oatey’s article and product FAQ conflict | Get approval for the exact fixture and putty formula; ABS-containing constructions remain excluded |
| A drain supplied with a sealing gasket | Read the exact gasket installation drawing | A supplied sealing system may change the bedding instruction |
| Pipe threads or a pressurized pipe leak | Putty is the wrong category | A flange bedding compound is not a pipe-thread repair |
Do not choose putty by the sink surface alone. The compound can touch the basin and the drain body at the same time. A stain-free formula may suit a stone basin but still be excluded on an ABS drain component. Check every surface in contact with the ring beneath the flange.
Oatey’s article permits pure, 100% acrylic, excluding ABS-containing blends or layers. Its product FAQ instead says no putty for acrylic tub or shower drains and specifies 100% silicone. These statements conflict. Require approval for the exact fixture and putty formula; do not treat an acrylic label as permission.
The putty-versus-silicone choice is also separate from the drain’s mechanical assembly. Bedding under the flange does not replace the gasket, washer or locknut shown beneath the sink. Keep the parts in the specified order. A missing sealing washer cannot be corrected just by making the bedding ring thicker.
A compatible flange that calls for putty
Use the fixture’s specified putty formula beneath the flange. Confirm both the basin and the drain body allow it before you form the ring.
Stone beneath the flange
Check for a stain-free requirement. The word “stone” does not approve every putty, and the stain-free label does not approve ABS.
An unidentified plastic drain
Identify the plastic first. Oatey’s putty restriction includes ABS-containing components, even when another contact surface accepts stain-free putty.
InSinkErator’s Badger instructions illustrate why the location matters. They show putty at the sink flange but warn against putty elsewhere on the disposer and against thread sealants or pipe dope. That is an appliance-specific assembly rule, not permission to smear the same material onto every connection below the basin.
Before servicing a disposer, InSinkErator says to disconnect electrical power. Follow the exact model’s manual and use a qualified person if you cannot verify a safe isolation or support the unit during removal. Rebuilding a sink flange should not turn into work on an energized appliance.
For a wider choice of flange compounds, see our plumber’s putty guide. The separate putty versus silicone comparison covers the narrower flange and seam decision.
Where silicone fits, and what cure time means
Kitchen-and-bath silicone makes an adhering flexible seal along approved surfaces. It is a separate choice from a pipe-thread compound.
| Question | Neutral example: GE Advanced Silicone 2 | Practical decision |
|---|---|---|
| Water-ready or fully cured? | Water exposure and full cure have different conditions | Do not use a water-ready claim as a full-cure promise |
| Fast water exposure | 30 minutes only with a bead up to 3/16 in., at least 65°F and at least 50% humidity | Outside those conditions, the sheet says wait 8 hours before water |
| Cleaning or touching the bead | Wait 24 hours, or until fully cured | Plan the fixture downtime before removing the old seal |
| Constant immersion or food contact | Excluded in the technical sheet | Do not use bathroom-caulk labeling as approval for those uses |
| Paint over the bead | This formula is non-paintable | Paint compatibility varies by formula |
The number on the front of a silicone tube is only part of the instruction. Water-ready and fully cured are different milestones for a kitchen-and-bath sealant. Read the current package for your exact formula before scheduling the return to use.
For a drain flange, use silicone only if the fixture instructions specify an appropriate sealant for that location. A product that works on an exposed sink seam does not automatically work between every pair of nonporous parts. A moisture-curing formula needs access to moisture; do not sandwich it between nonporous parts unless its instructions permit that assembly.
Preparation matters before a new bead goes down. Use the formula’s specified preparation for sound, clean, dry surfaces without old sealant or contamination. Confirm compatibility and adhesion on uncertain surfaces. A fresh bead over soap residue or loose old caulk is not the same assembly as a bead bonded to clean material.
A seam specified for kitchen-and-bath silicone
Match the sealant to the fixture surfaces. Remove old material and follow the actual tube’s preparation and cure instructions.
A bead that must take paint
Check the actual formula’s paint compatibility before sealing beside a painted surface. Kitchen-and-bath sealants do not all take paint.
Solvent cleanup near ignition sources
Alcohol and mineral spirits are flammable. Use adequate ventilation and keep them away from sparks and flames. Follow the cleaner’s safety sheet and PPE directions.
Can you use tape and pipe dope together?
Sometimes a named combination is permitted. It is not a default upgrade for every joint.
| Joint situation | Combine them? | Ahead |
|---|---|---|
| Fitting and both sealant instructions allow the exact combination | Permitted within those instructions | The approved method |
| Spears plastic threaded joint | No; its guidance forbids both together | One approved sealant |
| A washer, ferrule or flare makes the seal | Thread treatment is not a repair for that sealing part | The correct sealing part |
| A joint already leaks after assembly | Stop and identify the cause before adding layers | Diagnosis and a sound joint |
If both products are permitted, check the specified application order and amount. The tape thickness and paste lubrication both affect assembly. Do not add extra wraps or tighten farther just because the joint turns easily; the fitting maker’s limits still apply.
Ask which instruction would authorize the exact joint in front of you. ‘Someone uses both on metal’ does not answer a question about a plastic valve body. If the instructions are silent or contradictory, have the fitting maker or a plumber resolve the method before you put the system back in service.
Also avoid comparing sealants by the largest pressure printed in a general specification. The fitting, pipe, fluid and temperature can each impose a lower limit. A sealant claim does not raise the pressure rating of an assembled plumbing system. Use the system maker’s approved conditions and test procedure.
Apply the chosen material to the right place
The steps below are decision checks for ordinary water plumbing. The exact fitting or fixture instructions control the assembly and the leak test.
- 1Isolate the work before loosening anything
For a water connection, follow the fixture or valve maker’s shutoff and pressure-relief procedure. Let hot water cool before opening the joint. For work around a disposer, follow InSinkErator’s instruction to disconnect electrical power. Stop and use a plumber if you cannot isolate the connection safely.
- 2Identify the joint and inspect its parts
Find the model and installation drawing. Check whether the seal is made at tapered threads, a flange bed or a gasket seat. A damaged fitting, missing washer or wrong connection needs correction before a sealing material is chosen.
- 3Remove the old material without damaging the seat
Millrose requires clean threads, while Oatey’s putty guidance requires clean, dry flange surfaces. Use a method suitable for the material and finish. If a cleaner is required, follow its label for ventilation, gloves and eye protection; never mix cleaning chemicals.
- 4Apply only the approved thread treatment
For Millrose tape, follow the assembly direction and keep tape clear of the pipe opening. For T Plus 2, stir first and follow the diameter-specific application instructions. Use the fitting maker’s tightening directions, especially for plastic.
- 5Bed a compatible flange only as instructed
If the fixture specifies putty, make an unbroken ring at the shown flange location. If it specifies silicone, follow that formula’s preparation and cure rules, wear gloves and wash hands after use. Follow the label’s ventilation and eye-protection precautions. Keep the specified washers and gaskets in their correct positions.
- 6Test the actual connection
Restore water using the system maker’s procedure after any required cure. Dry the joint and inspect the sealing locations while testing. If it still leaks, isolate it again and have a plumber check damaged threads, cracked fittings or a wrongly assembled seal.
Do not convert these checks into a gas-appliance installation sequence. A gas fitting can have pipe threads at one end and a flare at another, with different sealing rules. Have a qualified installer handle the connection, the appliance shutoff procedure and the required leak test. Never test a gas leak with a flame.
If you smell gas, leave immediately. Do not use a phone indoors, operate switches or attempt repairs. Call the gas utility or emergency service from a safe place outside. Stay outside until the utility or emergency responders say it is safe to return.
What to check when the joint still leaks
Find the first wet location after the surfaces are dry. Do not use the lowest drip as the only clue.
| Observed problem | What to identify | Next decision |
|---|---|---|
| Water follows a sink drain body downward | Flange bedding and gasket positions | Reassemble according to the drain maker’s drawing |
| A nut leaks where a washer should seal | Correct washer, seat and end connection | Repair the specified sealing parts |
| A newly assembled thread joint leaks | Thread condition, material compatibility and assembly | Isolate and inspect; call a plumber if it persists |
| A seam bead pulls away | Old sealant, moisture, contamination or surface mismatch | Prepare sound surfaces and confirm compatibility |
| A plastic body cracks | Structural damage | Replace the damaged component; do not cover it with sealant |
A leak that starts only when the basin is filled may involve a different sealing location from a drip at a pressurized supply connection. Watch the assembly under the conditions the fixture maker uses for testing. Keep electricity isolated where required, and stop if water reaches wiring or an appliance connection.
Thread tape around the outside of a completed joint cannot place it between the mating threads. Likewise, putty pressed around a dripping pipe does not recreate a flange bed. These are reasons to open the correct joint safely, identify the failed part and rebuild the specified seal rather than cover the evidence.
If the thread names on an adapter are unclear, our male and female pipe thread guide explains the pipe-thread terminology. Compare that information with the connector drawing. Identifying an adapter is a separate step from deciding whether its threads or another sealing part actually contain the water.
Where package descriptions need a closer look
| Description | Maker evidence | What to do |
|---|---|---|
| Millrose 70660 listing: 1/2 in. × 260 in. | Millrose catalog lists the same exact model and size | No size conflict; 70660 is not the 1429 in. roll |
| RectorSeal 23631 retail can versus a maker page titled 24 pk | Data sheet identifies 23631 as a 1/4-pint can; 24 is case quantity | 23631 identifies the can size, with no promise of a case |
| Generic advice to use tape and paste together | Spears forbids that combination for its threaded fittings | The fitting-specific restriction controls |
| Stain-free putty described as suitable for stone | Oatey still excludes ABS contact surfaces | Check basin and drain materials separately |
Questions about tape, pipe dope and putty
Is pipe dope the same as plumber’s putty?
No. Pipe dope is a thread-sealing compound. Plumber’s putty is moldable bedding for compatible fixture flanges. T Plus 2 belongs on approved pipe threads; a putty ring belongs only where the fixture instructions show a bedding seal.
Is Teflon tape better than pipe dope?
Neither wins for every joint. Tape gives a dry wrap; compound gives a brush-on application. Check the exact pipe, fluid and fitting instructions. A plastic fitting maker may restrict either method or forbid using them together.
Can you use pipe dope and Teflon tape together?
Use both only when the fitting and sealant instructions allow that exact combination. Oatey describes some combinations, while Spears forbids combining tape and paste on its plastic threaded joints. Do not apply the general advice over that restriction.
Can plumber’s putty stop a pipe leak?
Plumber’s putty is not a repair for a pressurized pipe or a pipe-thread leak. Isolate the water and identify the failed connection. Use the specified thread treatment or repair the damaged pipe, fitting or sealing part. A persistent leak needs a plumber.
Do I put tape on every threaded nut?
No. Some threaded nuts pull a gasket, washer, ferrule or flare against a sealing surface. The threads may not contain the fluid. Read the connector drawing before adding tape; use the correct sealing part for that connection.
Should I use putty or silicone under a sink drain?
Use the drain and sink makers’ specified bedding. If putty is allowed, choose a formula compatible with every contact surface. Oatey excludes ABS even for its stain-free putty. Silicone needs explicit suitability for the joint and its own cure instructions.
Does stain-free putty work on ABS?
Oatey says its plumber’s putties, including Stain-Free, are not for ABS or ABS-containing materials. A stone basin does not cancel that restriction if the drain body contains ABS. Ask the drain maker for a permitted sealing method.
How long does plumber’s putty need to cure?
Oatey’s fixture-bedding guidance does not require a cure wait before testing. That does not remove the need to assemble the drain correctly and check for leaks. A fixture that specifies silicone instead needs that silicone’s actual water-exposure and cure schedule.
How many wraps of tape should I use?
Millrose’s Blue Monster instructions say three wraps seal most threads. Its half-inch 70660 tape is for fittings through 1-1/2 inches; use wider tape above that. Follow fitting-specific exceptions, including Spears adapter instructions. Three wraps is model-specific guidance, not a rule for every tape or joint.
Can I use bathroom silicone on pipe threads?
Kitchen-and-bath silicone is not the substitute for a specified pipe-thread sealant. Use approved tape or a compatible thread compound when the fitting seals at its threads. If it seals at a gasket or flare, follow that sealing system instead.
How we picked them
Why trust us
Isaac Daniels, a licensed journeyman plumber in Georgia (license #JP507711), owns PlumbingPicks and is responsible for this page. We compared the named maker documents to separate thread sealing, flange bedding and seam caulking. Recommendations here follow those documents and the joint each product is meant to seal.
How we pick
We checked the exact Millrose 70660, RectorSeal 23631 and Oatey 31177 identities against maker literature. We re-read the Amazon Creators API offers on Oct 22, 2026, 11:49 AM EDT: all three were genuine, new and in stock. CPSC lists no recall for Millrose, RectorSeal or Oatey. We compare their application methods rather than assign a score across materials that seal different locations.
We use each fitting maker’s restrictions alongside the sealant maker’s compatibility statements. Where they differ, this page shows the conflict. The joint-location drawing is our explanatory asset; it is not a manufacturer drawing, a pressure test or an installation dimension.
| Selection check | Rule used | Why no score |
|---|---|---|
| Exact model | Match the model and package size to maker documents | A correct model match is required, not weighted |
| Joint location | Separate pipe threads, flange beds and seams | Different jobs are not a meaningful overall ranking |
| Material compatibility | Check every contact surface and the fluid | A restriction cannot be averaged away |
| Assembly rules | Use fitting-specific instructions where general advice differs | A prohibited combination does not earn partial credit |
| Offer | Use a genuine branded New, in-stock listing | Availability is a dated check, not a product score |
Sources
- Millrose/Clean-Fit, Blue Monster PTFE thread seal tape product sheet, pages 1–2; Blue Monster product literature, tape size table. cleanfit.com; read Oct 20, 2026.
- RectorSeal T Plus 2 product page, model 23631, and Product Data Sheet R50205-2605, pages 1–2. rectorseal.com and official Bynder document; read Oct 20, 2026.
- RectorSeal T Plus 2 Safety Data Sheet, issued Aug 18, 2023, sections 7–8. Official RectorSeal Bynder document; read Oct 20, 2026.
- Spears Manufacturing, Selection, Design and Installation Basics, Joining Methods: Threaded Connections, pages 30–31. parts.spearsmfg.com; read Oct 20, 2026.
- Oatey, How to Select and Apply Pipe Thread Sealant, Oct 24, 2025, and Pipe Dope vs. Teflon Tape, Nov 13, 2025. oatey.com; read Oct 20, 2026.
- Oatey, How to Properly Use Plumber’s Putty, material restrictions and flange-bedding instructions; Plumber’s Putty product FAQs. oatey.com; read Oct 20, 2026.
- Oatey, Plumber’s Putty product category page: setting frames, faucets, bath wastes and basket strainers; stays flexible; stain-free putty for granite, marble, quartz, sandstone and Corian. oatey.com; read Oct 22, 2026, 11:49 AM EDT.
- InSinkErator Badger Series Installation, Care and Use Manual, sink flange assembly and safety warnings, official manual 138440. insinkerator.com; locally saved maker document read Oct 20, 2026.
- GE Advanced Silicone 2 Kitchen and Bath Technical Data Sheet, revision Aug 15, 2025, pages 2–5; product application instructions. gesealants.com; read Oct 20, 2026.
- BrassCraft, flexible water connector FAQs and gas connector installation instructions BC8472, flare and pipe-thread distinctions; Common Plumbing Mistakes. brasscraft.com; read Oct 20, 2026.
- Peoples Gas, Staying Safe Around Natural Gas, Staying Safe Around Natural Gas section of the welcome booklet. peoplesgasdelivery.com; read Oct 20, 2026.
- Amazon Creators API offers, Oct 22, 2026, 11:49 AM EDT: B00K80KTR6 (Millrose 70660), B0002YPAFY (RectorSeal 23631) and B006E356S8 (Oatey 31177; listing: oil-free, non-staining, soap-and-water cleanup, 9 oz); all new and in stock. Availability can change.
- CPSC recall search (saferproducts.gov), Oct 22, 2026, 11:49 AM EDT: no recall for Millrose, RectorSeal or Oatey.