Best Gasket Sealers of 2025

"I had a slow oil leak from a gash on my valve cover. After cleaning the area thoroughly, I used 'The Right Stuff' and let it cure overnight. I'm thrilled to report zero leaks now, and the patch is holding strong. I highly recommend this product!"

"As a DIY car enthusiast, I found the Permatex 82180 Ultra Black Gasket Maker to be exceptional. Its perfect consistency made application easy, and its unmatched oil resistance has kept my engine components leak-free. This product definitely deserves 5 out of 5 stars!"

"I used this product around the brass release valve on my diesel generator, which was leaking oil. After cleaning the area and applying it, I’m pleased to say no more leaks. It’s worked great for me!"

"I bought this product to seal around my oil pan. It worked great—the growth seal is not messy like other options and is easy to use. It's highly durable, and I will definitely purchase it again."

"I used this on a stator case gasket and had no pins to help align it. The tacky formula worked very well, and I ended up with no leaks—just as advertised!"

"I've been using this gasket adhesive for years on chainsaw repairs. It's a lifesaver and a money saver too! My only small issue is that the can can sometimes allow the adhesive to dry out, which is a bit troublesome during installation."

"I found this to be a great quality high temp gasket maker. I used it for my diesel heater and would definitely buy it again. It's a great brand!"

"This product seals really well in high heat and oily situations. I'm very happy with its performance!"

"I used it on my fireplace and only needed a little. I hope it lasts until I need it again!"

“I applied this on the exterior edge of my seal for the 2007 Jeep WK Grand Cherokee. It’s been a year, and there are still no leaks. It provides additional security without touching the gasket.”

“I found that it works well if you follow the instructions and let it set for an hour or two before assembly.”

“I haven’t needed it yet, but I’m confident it will be great when I do.”

"I found it easy to use and it really creates a waterproof gasket. It's excellent!"

"For my 1982 Yamaha Virago 750 rebuild, I used it between the two case halves. No leaks whatsoever, and there's still plenty left over for future projects!"

"I've used this product before, and if there's a gasket involved, it's definitely the right choice. It's clean, durable, and goes a long way!"

"I was dealing with constant leaks from my tractor's fuel valve. The usual copper crush washers weren't cutting it, and with parts on backorder, I decided to try this gasket goo. After preparing the surfaces, I applied it and reinstalled the parts. After 20 minutes, I refueled, and to my surprise, there were no leaks! Even after days of heavy work, it’s still holding strong. I’m considering waiting to replace the parts since this is working so well!"

"Having heard great things, I decided to test this product on my truck restoration project. I can confidently say it’s fantastic for gaskets! It not only keeps the gasket in place during installation but also provides extra leak protection. As a retired Heavy Equipment Technician, I genuinely wish I had discovered this product earlier—it's a total game changer!"

"I recently used this gasket sealing material for the first time after a friend's recommendation. I applied it to the oil pan gasket of my motorcycle and it worked perfectly! I followed the instructions, and there was no seeping whatsoever. I did have a minor issue with the brush breaking off, and the can lacked clear drying information, but overall, I'm impressed with its performance and ease of cleanup!"

"I always rely on Permatex; I never choose anything else."

"As a repeat buyer, I've used this product for various tasks, including sealing a rear differential cover and supporting gaskets on engines. It's a fantastic sealant and adhesive."

"With over 30 years of experience, I can confidently say this is great stuff for gasket sealing."

"I tested Hondabond against Permatex Ultra Grey, and Hondabond won for adhesion. I found it notably better for my drip line project, though I used Permatex because it was easier to distribute with a caulk gun."

"I got a great price and fast shipping. After my motor rebuild, I can say it's dry as a bone with no leaks!"

"This sealant works perfectly. I mainly used it to hold the new gasket in place, and it was cheaper than local options. So far, no leaks!"

"I used this material for a foot replacement rubber button on my stove grill. It also worked great for making a gasket on my lawn mower's valve cover. Worked correctly the first time!"

"I really appreciate the high temperature sealant. I applied it to my wood stove, and it performed exceptionally well!"

"I applied this product on a turbo oil return flange. It was easy to use and works well!"

“As a DIY mechanic, I find Honda Bond Hi Temp Silicone Gasket Maker to be an absolute game-changer! I've tried many gasket makers, but this one stands out due to its durability in tough conditions. It’s easy to apply and creates a reliable seal, saving me both time and money. I highly recommend it, especially since it's cheaper than dealership prices.”

“I’ve owned VWs and an Audi, but I still rely on Honda Bond for all my silicone sealing needs. If applied correctly, I’ve never experienced any leaks. Hondabond is hard to beat; it’s definitely my go-to choice.”

“I decided to test Hondabond against Permatex Ultra Grey for adhesion. After letting both cure under ideal conditions, I found that while both had good seals, Hondabond was notably better. It cured faster and was challenging to remove, proving its strength. However, for larger projects, the texture made it a bit difficult to handle. It’s great for smaller jobs though, as a true gasket maker.”