Caswell Epoxy Gas Tank Sealer (Motorcycle (10 Gal), Black)

After 4 separate attempts, with different products, to create a lasting flat black finish for the plastic fuel tank on my custom 1985-87 Yamaha Big Wheel (BW) 200 motorcycle, I finally found a group of products that worked. However, nothing would have worked (and didn't work) until I properly sealed the inside of the tank with Black Magic Motorcycle Gas Tank Sealer from Caswell.After following all of the recommended preparation directions (cleaning, covering holes, etc.), I simply mixed the two ingredients in proper proportions as described in the directions, manually rotated the tank for several minutes to allow thorough and consistent coverage, and allowed the product to fully cure (72+ hours November in CO) before allowing contact with gasoline or applying any exterior paint/primer. As recommended elsewhere I used SEM plastic adhesion promoter, SEM flexible primer/surfacer, Krylon Fusion Textured Black Paint, and then USC 2k SprayMax Matte Clear for a matte/flat clearcoat to create an attractive, durable and chemically resistant external surface for the tank.This tank (see pics) has been cured, in use, and consistently holding gasoline for over two-months without any sign of fuel seeping through the Caswell Gas Tank Sealer, paint peeling, discoloring or otherwise degrading, or any other problems commonly associated with painting plastic motorcycle gas tanks. There was easily enough epoxy leftover from the 10-gallon kit to fully seal an additional similarly-sized gas tank, but with the small cost of $54.99 for the motorcycle tank kit I did not feel the need to find an additional use for the leftover epoxy.I cannot recommend the Caswell Gas Tank Sealer product enough for anyone hoping to seal the interior of type of old, plastic or otherwise leaky motorcycle gas tank. The product worked perfectly, was simple to use, fumes are non-toxic, and comes at an affordable price! This review is primarily for the Caswell Gas Tank Sealer, but I highly recommend the other products mentioned for similar projects!

Worked well for toro greensmaster 1000 gas tank that kept rustingthe tank was .85 gallons and so i bought the mini 3 gallon kit. i also did warm the 2 cans in warm water to get the viscosity up since i was worried about coverage. i wanted 100% coverage even if it meant it was thinner in areas. i turned the mixture in the tank for 10 mins, and ended up pouring a lot out - i wish i had turned for longer and gotten a thicker coat - but would have required me turning long enough that the chemical reaction for hardening had taken place. All good and works well but would have wanted a thicker application

I have used them all over the years refurbishing old bikes, Kreem, por15 and various others. This time I was working on an 1987 Yamaha XT600 and someone had Kreemed the tank and it failed as Kreem always seems to do over time. I researched and found this product and couldn't be happier with the results! If you follow the directions exactly as they say this product will probably outlast the bike. There is one thing I would like to mention though, I bought the black and it wasn't exactly what I thought, it is not black but more like a tint. In other words don't think it's going to come out black but rather still transparent with a black tint. Other that that this product is the BEST!Another tip: if you have to remove a failed product from the tank as I did the following way is the only way to do it easily and effectively remove it and prepare your tank to coat.(1) leave the petcock in as your prob have to buy a new one anyway from the old liner destroying it. Go to home depot or lowes and get enough (MEK) Methol Elthol Ketone to fill the tank your refinishing. Fill the tank all the way up and take care not to get on any paint as it will remove it. Also wear gloves, eye protection, and a GOOD respirator (not a paper mask) but a respirator as this stuff is nasty, nasty stuff. Also, do this outside or in a well ventilated area, Unless you want your kids born with three eyes!Anyway, let it sit for atleast 24 hours and swish around in the tank every couple of hours, also you can add some old bolts or a piece of chain to break stuff loose but it's really not nessasary.(2) after 24 hours pour the MEK back into the can it came in, again wearing the above mentioned safely items. You will see that EVERYTHING was removed, if not repeat the above (with the same sollution) rinse with dawn dish soap and hot water to remove any remaining gunk, oil or MEK.(3) if your tank has rust like mine did, (this product can be used over rust) but in my case I figured I've gone this far I might as well remove it. There are two easy ways to do it and they are as follows: fill the tank with either white vinegar or muratic acid and let sit. The vinegar is safer but takes ALLOT longer, let sit for 24 hours, maybe longer with the vinegar. Drain and rinse with hot water, also you will want to add baking soda and water and swish around to deactivate the acid (DO NOT SKIP THE THE BAKING SODA STEP)(4) rinse out the baking soda sollution, take the petcock off and rinse again with hot soapy water, then dry COMPLETELY (put a hair dryer in the hill nozzle)(5) you will see the tank is completely clean and free from all rust with the metal etched and ready to use your product. Make sure you use the coating in a timely manner or the tank will fash rust again. Follow the direction for the coating and let sit for atleast 24 hours in a temp controlled room and you now have a brand new gas tank ready for fuel!Another note: this product does not give off any fumes, therefore you can coat it anywhere inside your home or garage. I know ive been long winded in my review but if you follow these directions you will be a happy camper!!!!

I always think that an image says more than a thousand words, it is the best sealant that can exist, I have been fighting for 2 years with the rust of my motorcycle tank, the tank is from a 2014 Yamaha R1 I thought about giving it up until a friend I recommend this sealant, and it is simply incredible, I have tried the sealants of Mac's, Por-15 and Kreem and all failed, they did not support gasoline, they did not seal in rust and one of them clogged the filter of the fuel pump, the sealant of Caswell after 24 hours it becomes hard as stone, although I recommend letting it dry at least 3 days before mounting and putting gasoline, I recommend it completely, a 5-star product.

I had planned to use on a new tank and researched that it would be important to scuff the inner tank so the epoxy will stick to inner walls. After speaking to customer service I did not have a warm & fuzzy that this would work out well. My question was, how do you know when you have scuffed the inner tank with Sheetrock screws enough? No sure🤷‍♂️🤦‍♂️.

Unfortunately, the blue tape protection on my paint peeled off clearcoat with it, but the tank liner is inside of the tank, but I kinda wish I wouldn’t have done it, then I wouldn’t have screwed up the paint just from trying to protect it. after I got all the old liner out, I should’ve just left it.