Versachem 90180 Heavy-Duty Fuel Tank Repair Kit - 30 Grams

I used this to repair a 2003 TTR-125 L dirtbike fuel tank. The tank is plastic and has a significant crak about 7 inches in length and 1/8" wide at the middle, and a little less towards the ends. The crack was towards the top of the tank and ran along the upper side of the tank fairings, parallel to the ground. This is a common crack on these dirtbike fuel tanks. A new tank is $225 and a used one around $130. As the bike is just a beater, those costs were much too high. The previous owner attempted to repair the tank with some sort of epoxy, but it failed miserably and leaked fuel all over. I used this product and followed the directions completely with additional precautions taken to ensure success. I drained the tank, aired it out overnight, knocked off the old epoxy, sanded the crack with one inch on all sides, cleaned the area with CRC Brake Cleaner, warmed the tank inside the house and applied the epoxy mix. Note that at first, the epoxy went on with some viscosity and stayed where I put in. In about 30-45 seconds it became quite warm, almost hot, and was much more water-like in viscosity. I had to tilt the tank to keep it from running off. Prepare accordingly. Now, for the result. The tank is sealed! The bike was taken for multiple rides with new and experienced riders, some of whom lightly crashed, but the epoxy is still holding strong. I am very satisfied. The package includes a fiberglass cloth that goes over the first coat and then you apply a second coat on top. I think this really helps to keep everything together versus just plain epoxy. Time will tell on the longevity, but so far it is working very well. Even if I have to reapply every few years, it's worth the effort to save $200+.

I have to say this is a great product. I had already head my gas tank out to try and replace the leaking tank, the used tank I bought turned out to be leaking as well, so I returned that. I bought this product thinking it looked like the best available compared to others. Please note: as with all epoxies, taking the time to grind the rust and dirt off and cleaning the surface well is critical for it to work. The epoxy comes as a plastic package with the two parts sealed off. To mix it you just squish the one material to the other side and mix it in the bag. The cure time does not seem to start until you cut open the package and expose it to air. Pros - Fairly easy to open packaging - The cleanest epoxy I've ever used - Has now sealed my gas tank for over a month - Price Cons - Once you open the package, you are pretty much stuck with using the whole package (actually covers a lot of area too) - Isn't the easiest to mix at 40 F you may want it warmer for working with this product. (I understand most epoxies are like this too) Overall a great product for a great price. Covers a lot more area than I had expected from pic online and the 30 gram weight label. To those who may wonder, I had pinholes on my tank toward the bottom, I have no problem with filling my ~20 gallon tank completely.

It says in the description "Works best on metal and plastic tanks, fuel tanks, and oil pans." so I used it on the plastic fuel tank on my riding mower. I prepped according to the instructions, applied per the instructions and it held fine for the last month or so of mowing season last year. I drained the tank and put the mower away in my garden shed for the winter. Got it out last weekend and fueled it up and it leaks like a sieve. Used the mower/leaked fuel down lower than the repair to check it and the repair just peeled off like a piece of wet tape. Absolute garbage and a waste of time & money.

My tank on my snow blower was leaking like crazy. I decided to give this a try. It works well at sealing holes, but if you have large holes or areas (like the entire seal around the top half of the tank - like mine) it might not be enough. Also note it starts to harden really quickly, so you have to work quickly and might need a second pack for a large area.

#2 fuel oil or diesel fuel leaks are very hard to stop with chemical sealing products. I've tried many such as JB Weld (which works well putting broken things together) but if the tank is leaking they won't work. I had a very small seeping leak on a 3 year old 275 gallon heating oil tank. The tank was full. The leak was on the very bottom of the tank. I wiped off the oil with a rag then wiped it off again using a rag soaked with rubbing alcohol. The leak appeared after about 5 seconds of watching. I sanded the area to bare metal the wiped it off again and saw the area of the weeping leak . This kit comes with a small cube of some kind of stuff. But the directions say to rub the leak area with it so I did. I was amazed to see the seep stopped. The cube of stuff, which seemed quite hard produced a stickyness that stopped the leak! I cut a 1" square of fiberglass that came with the kit, mixed up a small amount of the two part materiel and put it on one side of the fiberglass patch and pressed it against where the leak was on the tank. I used a small flat piece of wood instead of the brush they supply to spread the rest of the stuff on the patch and it hardened in about 5 minutes. I had much more of the two part material left so I mixed up about the same amount and spread it over a little larger area to reinforce it. The tank does not leak anymore. Product worked very well for me.