RectorSeal No. 5 25790 Pipe Thread Sealant, Lubricates & Protects Threads, Soft Setting, Slow Drying, & Permits Easy Breakout and Contains No Other Metals, 1.75 oz

Rector Seal No 5 is one of those products that just works. It goes on smoothly, lubricates the threads well, and gives a dependable seal without drying out too fast. The soft‑setting formula makes adjustments easy, and it’s great for protecting threads long‑term. A solid, reliable sealant for plumbing jobs where you want something proven.

I use this thread sealant for my fuel cut off valves that I installed on my aqua hot heater on my RV. No leaks works really good. Great product.

quick shipping, worked as promised

Easy

This seems to work really well I had to install a gas line and I was reluctant to just use the tape so I added this as well and no leaks. The bottle is a little smaller than I had expected but it’s a great amount and I’ll never use it up.

Used this to fix my air compressor. The 3-port one way valve on the 50 gallon tank had failed, seized in place, brass into steel tank. Really tore up the threads removing it, had to re-tap it with a Chinese tapered tap in the steel bung. All that said, the "new" threads were not great - really rough. This Rectorseal product filled in the imperfections and sealed perfectly. Tank has been holding 95 psi for 24 hours so far. I did apply to both the inside threads on the steel AND the threads on the brass, but it worked and helped me save a >$300 compressor. AND I have plenty left for other uses. I think I will use this in places I normally would have used Teflon tape.

Price is unbeatable. Comes with plenty for what I needed it for which was a Blackstone grill. the color also makes a very easy to see. No issues with application.

Excellent stuff. Not for use on PVC or CPVC. This is good on brass gas lines, etc. If looking for a more general purpose, go with the white tube, not the yellow one. I tape first, then place a coat of this on top of the tape.

This stuff is awesome. For propane or water, Seals on the first try every time!

Good product. Great Customer service! Highly recommended.

We use this for sealing almost everything! Worked well on our trip to Alaska and back.

Functions as intended. Looks the same as the original stuff and easy to use.

I used this on all the pipe thread joints, from the brass nipple at the submersible pump, to the pressure tank manifold, and pex 'A' adapters, on a new house. Most connections were brass thread and this sealant was used along with teflon tape. This was advised on a forum and it works. Not one leak at 50 lbs. I've used many sealants over the years and have yet to find one that works consistently on potable water plumbing.