ProSeal Instant Gas Tank & Radiator Repair, 1 oz – Steel-Reinforced Epoxy Putty, Permanently Seals Small Holes, Cracks & Split Seams, Adheres to Wet Surfaces

I've been dealing with a crack near the bottom of my fuel tank on my 79 Jeep J10 for a long time. I took the fuel down low so the crack would be dry. I cleaned it up with sandpaper and made sure it was dry. At first I thought this product was tough to knead, as it was but it's worth it. At first it seems like it's not bonding but over maybe 1 minute I could tell it was getting stickier and stickier. I got it where I needed it to be and wow was it clearly adhering. Not one drop has leaked through after setting. This is what I'll always use from now on. It shut down a full big crack completely. It is rock solid. Huge fan.

I had this on hand when I got a gas tank puncture on some road waste—Gasoline was leaking in a steady drizzle through a pea-sized hole under the back of my car.I mixed the putty as instructed, and pressed it firmly against and into the hole.Not only did the gasoline immediately stop spewing, but as advertised the patch was rock solid after just two hours.This is a permanent fix that has now held up fir several months without needing to apply another layer.

Work as described, fix my problem no time

I was concerned at first because the leak wouldn't stop. The gas tank empty is the best time to apply. Will work with a leak but will take longer. If the hole is less than an inch in diameter, should work. Irregular damaged, like exhaust burn works too.

It’s says no drain required but it’s a lie have a small hole in my gas tank and it seals but doesn’t dry because you have to drain it I’d chalk that up as false advertisement

It has been a month or so since I purchased. To begin with it seemed to uphold, as described and I was impressed with the hardness and that the leakage stopped. For the price it seemed good for the money.Then the cold temperature hit and it and the durability weakened. It actually fell off.I would say good for spring and summer but not if you live somewhere that gets cold weather.

It was very easy to apply, it has very good adhesion, it stopped the part that was leaking , it hardened as the product indicated

No leaks