Hercules 15620 Real-Tuff Heavy Duty PTFE Pipe Thread Sealant, White, 8 oz.

Generally, used on high pressure natural gas metal lines ( black pipe ). Used orange sealant. Used blue sealant, used black sealant, used thread tape, at 50 PSI on remote external oil cooler for air cooled 2332cc engine would leak at fittings. To create more space between high torque starter, and cooler, down sized from 72 plate to 48 plate cooler. Brand new cooler, same with brass fittings. 12 yrs with 72 plate, no leaks. Friend suggested using Hercules Real Tuff sealant. Read up. Liked what I read. Brush in can/bottle is stiff as an oid straw broom. Worthless. This stuff is thicker than cake frosting. A little bit, goes a long way. After using Brake Kleen and dry cloth to clean fittings, Used nitrile glove on hand, to dab a bit of sealant on male fitting. Using flare wrenches, tightened things up. Wiped excess sealant away. Took car for ride ... No leaks ... not a micro drop of oil. This stuff gets everywhere ! I used hand/body lotion mixed with liquid hand wash dish soap. The lotion makes a difference. Still have to work at picking and scrapping off skin and clothes. Product does what it promises to do.

This stuff is profoundly, utterly, in a different league than any of the Rector or Oatey dopes I've used in the past. Easy to apply, lubes and seals _flawlessly_ - including out of spec threads that stubbornly refuse to stop leaking no matter what other dopes I've tried. No cure time. Works on gases (I'm using for propane and air lines) and water (I'm using for that too), down to absurdly low temps you won't see outdoors on this planet (and I need it, it gets into the -50° range here). Flawlessly seals brass to polymer connections - or metal to metal, or poly to poly. It stays pliable, so you can unthread it, clean it up, and refit as needed, if you want to swap pipe around. It's thick and goes on easy, doesn't drip, but it will hitch a ride on your hands and tools - so have a rag handy. This stuff is incredible. Top performer! As long as they keep making this, I can't see myself ever using a different pipe dope for my needs. I'm completely sold on it.

This PTFE thread sealant has been an excellent product to keep on hand for plumbing, shop, and general repair work. What I like most is how versatile it is. It works well on all kinds of materials, including metals, PVC, CPVC, and ABS plastics, so I don’t have to keep switching between different products depending on the job. It spreads smoothly, fills gaps and imperfections effectively, and helps create a solid, dependable seal without a lot of extra effort. One of the biggest advantages is how quickly it performs. Once applied, it forms leak-free joints that can be used immediately, which is a huge time saver when you’re trying to finish a repair or installation without waiting around. I also appreciate that it’s suitable for lines carrying air, liquids, drinking water, and gas, which makes it a very practical all-purpose sealant for both home and professional use. The performance specs are impressive too. It handles a wide temperature range and stands up to high pressure, so it gives real confidence that the seal will hold under demanding conditions. Overall, this is a dependable, heavy-duty sealant that performs exactly as promised. If you need a strong, multi-purpose thread sealant you can trust, this one is definitely worth buying.

I like this pipe dope because it goes on easy unlike the tape that ends up covering part of the pipe if you aren’t careful.

I tried for months to stop a steady drip of my price-pfister tub faucet. Replaced seats and stems. It still leaked. When I found this product I was skeptical because of the past failures using other products. Surprisingly, IT STOPPED MY LEAK. We didn’t have to call the plumber after all. So grateful for finding this product. It doesn’t disappoint.

Good product

I’m on my 3rd bottle. This stuff is all you need to seal everything you have. Best out there hands down and the price is a good value. I’ve had leaks that wouldn’t seal until this was used. Grab 2 and give to a friend or family member. They’ll thank you later. GLTA

This anti seize is good stuff.

Molto efficency

Great product, no tape that shreds and jams fittings, brush is included in can. Keep a rag handy it can get on your hands.

Good stuff did its job and did it well would highly recommend to everyone