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Home > Tank Sealers

Large Cycle Tank Sealer Kit

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Large Cycle Tank Sealer Kit

This great 3-Step cost savings kit designed for the repair of larger sized motorcycles, generators, lawn mowers, tractors, snowmobiles, or other tanks up to 12 gallons. Detailed instructions included. Satisfaction guaranteed!

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Part #: 52050-S
Do You Need Mesh? 
(+See 2 Questions)
Working on a Tank with a Previous Liner? Our PLUS KIT contains a Quart of Strip to quickly remove failed sealers. Go HERE for the PLUS KIT.


"I tried this product myself ... WORKED GREAT!!!!!"

Dave Stewart, Product Specialist for JP Cycles

The Large Cycle Tank Sealer Kit contains everything you need to seal a tank of up to 12 gallons.

Gold Standard Fuel Tank Sealer, from the makers of KBS Coatings, is a superior, single-component, ready-to-use fuel tank sealer.

KBS RustSeal

Gold Standard Fuel Tank Sealer is specifically formulated to stop rust and corrosion by forming a tough, fuel impervious coating while simultaneously sealing small pinholes and weld seams.

This kit contains our KBS Klean (a water-based, heavy-duty, cleaner/degreaser) and KBS RustBlast (a powerful rust remover/metal etch) to obtain a permanently sealed, rust-free fuel tank. These KBS prep products are formulated with a unique Oxygen-Block Technology which reduces the occurrence of flash rust by over 80% and extends rust-free storage times by leaving a temporary protective coating in addition to a zinc phosphate film.


  • KBS Klean Quart
  • RustBlast Quart
  • Gold Standard Tank Sealer Pint
  • Nitrile Gloves
  • Stir Stick
  • Detailed Instructions


  • Silver metallic permanent coating
  • Eliminates all rust & corrosion
  • Impervious to all fuels, alcohol additives & most solvents
  • Gold Standard Tank Sealer can withstand temperatures of up to 500° F.
  • Permanently seals pinholes & weld seams
  • Flexible to expand & contract
  • Non-flammable
  • Environmentally safe
  • Contains no Methyl Ethyl Ketone


steel, aluminum & fiberglass fuel tanks • oil tanks • utility tanks • non-potable water tanks

Instructional Videos

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Questions and Answers
+See All Questions

Q: Can this product be used in diesel fuel tank?

Asked by:  - 11/7/2014

A: Yes, the Gold Standard Tank Sealer is completely impervious to diesel fuel and is used in diesel fuel tanks all of the time.

Was this answer helpful?   10 of 10 Customer(s) found this Answer helpful.

Q: What is the "mesh" (that is an option on the order form) used for?

Asked by:  - 4/23/2014

A: You can use the piece of BackBone Reinforcing Mesh for exterior repair of pinholes or weld seams. Prior to patching, prep the outside and inside of the tank by using KBS Klean and RustBlast and allow all surfaces to dry completely. Begin by sealing the inside of the tank as outlined above. After sealing, immediately use any remaining Sealer to paint a thin layer on the exterior pinhole area(s). Using a suitably sized piece of BackBone Mesh, embed it directly into the wet Sealer and apply another thin coat of Sealer painting outward from the center. Let cure.

Was this answer helpful?   9 of 9 Customer(s) found this Answer helpful.

Customer Reviews - Others Say It Best +See All Reviews
review 214 Total Reviews Sorting:
Rating Product Works Great
The product works great and is easy to use
Reviewed by:  from monroe, mi. - 6/28/2017
Rating 6 Years Later - Still Sealed
I used this kit 6 years ago in my gas tank and its still perfect!!!
Reviewed by:  from Brookfield, WI. - 5/16/2016
Rating Great Product
Used this product to coat an aluminum fuel tank for methanol which customer inadvertantly purchased instead of stainless steel.Product was easy to use and has shown no signs of breaking down in the methanol.
Reviewed by:  from Rome,NY. - 8/1/2015
Rating Goldwing tank is better than new
Wow, what a great product. I had a Goldwing that sat for two year and the tank was full of old gas and rust. The Klean removed most of the old gas when I put some nuts and bolts in there to swish around. The rust remover worked great and the tank looked almost new when that step was done. The sealer needs to be done right. If you put in more than needed you need to take time to keep getting it out of the tank when it pools. If you take your time you will be extremely satisfied. Give it 5-6 days to cure fully. This is probably the best product on the market for tank restoration.
Reviewed by:  from Houston TX. - 5/11/2015
Rating Great Product for large motorcyle tanks
Product was exactly what I was looking for. There was enough product to do a 6 gal. motorcycle fuel tank, no problem. Easy to work with and it looks like it will do the trick.
Reviewed by: (Verified Buyer)  from Alpine, WY. - 4/29/2015
Rating Great Product
Used the tank sealer kit on two Honda 3 wheelers that had been sitting in a barn for several years. Rust buildup in gas tanks was significant. I modified the process slightly as I wasn't sure if the rust remover would get all the rust out. After the cleaner, I soaked the tanks with apple cider vinegar for a week to break loose the majority of the rust. Was left with a little bit of rust and some flash rust when I used the Rust remover. It cleaned out the remainder and left me with a clean tank to use the sealer. One of my tanks had a baffle at the gas cap and it was a real pain getting the excess sealer out of the tank. I finally just tipped it on the side and used a paper towel to soak up as much as I could. Then turned the tank some more to spread out the rest and it worked ok. So far, the tank sealer seems to be holding up well. I'll never know how long it will last as I plan to sell the trikes.
Reviewed by: (Verified Buyer)  from Austin, TX. - 10/29/2014
Rating Excellent Product
Prep time for this takes a while. Be patient and prep the tank properly and you will get great results!
Reviewed by:  from Pulaski, PA. - 7/25/2014
Rating Interesting material!
Preparation is for surface treatment is a PITA. You can't expect any surface treatment to adhere to grease, wax or a crumbly substrate like rust. Working on a steel pancake tank for a generator the first step was to wire brush the outside and solder any pinholes. I used a scratch awl to probe for holes and enlarge them a bit before soldering with a 100 watt iron and conventional plumbers solder and flux. Preparation gets nasty when it's in a small inaccesable area like the inside of this rusty gas tank. It seems like you can rattle chains around in it for an eternity and never really get all the loose rust out. Blowing a bit of compresed air along with the shaking seemed to help. I then degreased with a commercial degreasing detergent. Perhaps that should have been done before trying to break free rust out by shaking a chain in the tank, but mine was bone dry and I didn't relish the idea of first washing and then thouroughly drying the tank before trying to knock lose any rust. The tank was seriously rusted and while the KBS kit provides both a degreaser and a rust treatment, the small container seemed inadequate for the task at hand. Accordingly the next step was devised like any self respecting hacker would. In went about four cups of water followed by a cup of Muratic acid. A word of caution: Muratic acid is something like 30% Hydrochloric acid and will burn your skin, can blind you, and has fumes guaranteed able to cause respiratory failure -- skip this step entirely if you don't absolutely positively know what you are doing. Never mind that I looked goofy working outside decked out in heavy rubber gloves, a full rubber apron and a full mask when using a glass measuring cup to adding the acid to the water in the tank (never add water to the acid). Twice the tank got a swish or two and a 15 minute soak in fresh solution. The waste went into a plastic bucket. The bucket got dumped after tossing in a few handfulls of garden lime to neutralize the acid. After a good rinse and carefully blowing out the tank with compressed air I started the KBS process. An old fashioned headcap, hose and fan hairdryer is handy for overnight drying the tank, but I suppose a vacuum would do. The idea is to get the tank absolutely dry before applying the final KBS coating. It's unreasonable to expect any organic or oil based coating to stick to a wet surface! This is where the fun begins. My work bench is an old solid core door with a pathetic veneer that was beginning to crack and peel off. Ripping off the veneer was easy but the poplar core was neither smooth nor particularly robust for a work bench top. Hmmm, eventually the remaining KBS coating would need to be dumped. Why waste it? I now have a non-leaky gas tank and a seemingly impervious pearlescent silver work bench top for free.
Reviewed by:  from Washington, DC. - 6/27/2014
Rating Great fix for an old tractor
Excellent detailed instructions. Easy to follow and great tips. I liked that it gave me ample time to get a great leak repair and told me how long between treatments.
Reviewed by: (Verified Buyer)  from Murfreesboro, TN. - 6/16/2014
Rating Best product ever.
I bought this product for my most recent GL-1000 vintage restoration project. I had a grossly rusted tank and ordered this product, used it, and was absolutely amazed in the quality of the product. I am so impressed with it that I will only use this product for anything previously rusted, or anything I would want to rust-proof. Don't get it on your skin though. It took about a month and a half to come off.
Reviewed by: (Verified Buyer)  from Austin, Texas. - 5/28/2014
Review Large Cycle Tank Sealer Kit
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