AP Products 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+.

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.

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- PriceCons- 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.

The only product I found that can be applied on a dripping fuel tank. I had a small cut on the bottom of a plastic fuel tank that was slowly dripping. All other products I tried would dissolve in the leaking fuel and not fully seal after drying. This is the only product that sealed the tank. If applied on a dripping hole wait a little longer before applying it, it will be less liquid and not wash out that easy because of the fuel. Dries very fast so be prepared! On a plastic fuel tank this is still just a temporary fix; the patch becomes so hard that it will crack and leak after the plastic tank deforms a couple of times after refills and driving around.

So I bought two of these for repairing a 3/8th size hole in my tractors plastic fuel tank. Literally says all over the package not for plastic tanks so I was more then a little apprehensive but seeing I didn't have allot of options other then 800 bucks for a new tank I figured I try this. First time I used I didn't drain tank, I used a lag covered in this stuff and ran it into the tank. Needless to say that slowed the leak but didn't seal. Second go round I drained all fuel, sanded the area around the hole and cleaned the area to the best of my ability. I applies the mix as directed and placed the fiberglass patch over mixed product, by the time I placed the patch the mix was already hard enough I couldn't cover the patch as directed. So..... I opened another pack, mixed and then slathered the outside are of the patch allowing everything to throughly cure 24 hours prior to placing fuel back into tank. So far 60 hours later and no leaks. The other reviews about the mixture hardening very fast is correct, package says 5min, I'd say 2min max until the mix is unusable and hardening. Other wise time will tell, so far so good.