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.

quick shipping, worked as promised

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.

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.

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.

Easy

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.

My well pressure tank started showing signs that it was failing. The well pump would cycle frequently, build up a lot of pressure and then drop quickly. I didn't want to burn out the pump or create a water line leak. I purchased the same Well-X-Trol unit, a Boshart tee kit and associated fittings and reducers. I initially only used the typical white Teflon tape around the threads. I did this even seeing that the old fittings had sealant around them. Sure enough, I encountered some small leaks. All but one sealed themselves over time. The leak that remained was at the tank and tee junction. It wasn't a gross leak, so I figured I would get to it when I had time. As it turns out, a pinhole leak in the copper piping forced me down that road. I had shut all the water off and the next morning the entire pressure tank was empty. So along with fixing the water line leak, I opted to redo all the fittings and connections on the pressure tank and tee. I searched plumbing forums, and it was recommended to use a better tape and/or a sealant. There is much debate as to whether to use one or both, but I opted to use both. I used Megatape and Rector Seal # 5 the second time around. I wrapped the tape around the threads in such a manner that it was always in the clockwise orientation when being screwed into a fitting. This orientation helps to ensure the tape doesn't unravel as fittings are being mated. I went around at least four times for most fittings, the exception being at the tank and tee junction, which I wrapped five to six times. I made sure the tape was fairly tight around the threads as it was being applied, went over it a couple times with my fingers and then added Rector Seal # 5 over the tape. The sealant filled in the thread groove nicely even served as a lubricant during installation. This allowed me to at least get one to two full turns on each fitting. Long story short, the second time around worked. In the future, I will follow the same procedure on any plumbing job that has similar fittings.

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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.