Plumbing Picks is reader-supported. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
Quick answer from a licensed plumber: They seal different things. Teflon (PTFE) tape and pipe dope seal threaded pipe joints (tape for most home jobs, dope for larger/metal or gas-rated work). Plumber’s putty seals under fixtures like sink drains and faucet bases. Silicone is a permanent waterproof caulk for seams and gaps. Using the wrong one is the #1 cause of leaks I get called to fix.
Which Sealant for Which Job
| Product | Use it for | Don’t use on |
|---|---|---|
| Teflon tape | Threaded pipe connections | Compression fittings, drain bodies |
| Pipe dope | Metal/large threaded joints, gas (rated type) | Plastic threads it can attack |
| Plumber’s putty | Under sink drains, faucet/strainer bases | Plastic that cracks, pressure joints |
| Silicone | Permanent waterproof seams, gaps | Threaded pressure joints |
Teflon Tape vs Pipe Dope
For threaded joints, Teflon tape (3–5 wraps, clockwise) handles nearly every household connection. Pipe dope is preferred on larger metal threads and is required in a gas-rated version for gas lines. Many pros use both on critical joints.
Plumber’s Putty vs Silicone
Plumber’s putty stays pliable and is perfect under a sink drain or faucet base because it’s removable for future service. Silicone sealant cures hard and permanent — great for a backsplash or shower seam, wrong for anything you’ll need to take apart.
The Plumber’s Verdict
Keep all four on the shelf — they’re cheap and each solves a different leak. Tape/dope for threads, putty for fixture bases, silicone for permanent waterproofing.
FAQ
Can I use Teflon tape instead of plumber’s putty?
No — they do different jobs. Tape seals threaded joints; putty seals under fixtures like sink drains. They’re not interchangeable.
Which way do I wrap Teflon tape?
Clockwise (the direction the fitting threads on), 3–5 wraps, so it tightens rather than unravels.
Is plumber’s putty or silicone better for a sink drain?
Plumber’s putty for most metal sink drains (removable later). Use silicone for some plastic fixtures or where the manufacturer specifies it.
Where to Buy
Check current prices on Amazon: Teflon/PTFE tape · Pipe joint compound (pipe dope) · Plumber’s putty.
Fix the 12 Most Common Plumbing Problems Yourself — Free Plumber’s Handbook
Step-by-step fixes for the 12 most common problems — and exactly when to call a pro. Free and instant, from a licensed plumber. Save hundreds on calls you didn’t need.