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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.

Large Cycle Tank Sealer Kit Overview

"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.

Large Cycle Tank Sealer Kit Contents

  • 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

Directions, Info Pages, and Tech Support

Tank Sealing DirectionsTank Sealing Flow Chart
Tank Sealer Tech Data3-Step Tank Sealing System
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Tech Support Forum
How To Avoid
Common Tank Sealer Mistakes
Tank Sealer How-To'sTank Sealer FAQ's
Tank Sealer Chemical Resistance 

Video - Sealing a Gas Tank

Learn how to seal up a Motorcycle Gas Tank with the KBS Cycle Tank Sealer Kit which gives you everything you need to seal a tank of up to 5 gallons.

Video - Sealing a Car Gas Tank - Part 1 of 4

Covers tank removal & fuel tank repairs.

Video - Sealing a Car Gas Tank - Part 2 of 4

Covers degassing the tank and welding any holes that are larger than pinholes.

Video - Sealing a Car Gas Tank - Part 3 of 4

Covers cleaning the tank with KBS Klean and etching the tank with RustBlast.

Video - Sealing a Car Gas Tank - Part 4 of 4

Covers sealing the tank with Gold Standard Tank Sealer.

Search The KBS Support Forum

WARNING: This product contains a chemical known to the State of California to cause cancer and/or birth defects or other reproductive harm. www.P65Warnings.ca.gov

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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?   12 of 12 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 216 Total Reviews Sorting:
Rating 100% satisfied
worked great for me
  Did you find this helpful?    101 of 105 Found Helpful
Reviewed by:  from lafayette, la. - 5/31/2011
Rating Great product
Covers and holds well. I like that the prep materials are water based.
  Did you find this helpful?    101 of 105 Found Helpful
Reviewed by:  from decatur, il. - 9/25/2011
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.
  Did you find this helpful?    101 of 105 Found Helpful
Reviewed by:  from Austin, TX. - 10/29/2014
Rating Worked like a charm
Was able to save my tractor tank. Follow the directions and have patience. Do not rush. Watch the videos a couple times to make sure you under stand how to do it.
  Did you find this helpful?    96 of 98 Found Helpful
Reviewed by:  from Sparta, Michigan. - 8/25/2011
Rating Finally I got smart!
Works as promised. It doesn't get any better than that.
  Did you find this helpful?    96 of 98 Found Helpful
Reviewed by:  from Urbanna VA. - 1/26/2012
Rating Product was easy to use
I found the directions were easy to follow, and the product was easy to use.
  Did you find this helpful?    96 of 98 Found Helpful
Reviewed by:  from Salt Lake City, UT. - 5/1/2011
Rating Outstanding Product!
This tank sealer kit was perfect for my restoration project. My 1949 Farmall Cub was in dire need of a gas tank restore. Went on easily and was supplied with easy directions. Piece of cake.
  Did you find this helpful?    96 of 98 Found Helpful
Reviewed by:  from Mississippi. - 1/29/2013
Rating This product is the real deal !
I had no trouble using the large Cycle Tank Sealing Kit. The instructions were easy to follow, and the two cleaning products worked excellent. I was really impressed with the Rust Blast. I let it sit for about 40 minutes, shaking it around good every 5 minutes or so. when it came time to coat the tank, I used a 1 inch inspection mirror to make sure the coating covered all places that I couldn't see through the tank filler hole. This kit was big enough for to do one 5 gallon, one 2.5 gallon and one 2 gallon cycle gas tanks, easily. Definetly use in a well ventilated area while drying. And don't wear anything you don't want ruined. The fist tank I did, I got a little careless and dripped some sealer on my shirt when I turned the tank upside down. That part of my shirt will never rot. All-in-all, the products all worked excellent and I will use again, as well as highly recommend to anyone wanting to seal a tank without worrying about it peeling off and having to do it over.
  Did you find this helpful?    96 of 98 Found Helpful
Reviewed by:  from Port Angeles,WA. - 5/4/2012
Rating Excellent Product!
I used the Large Cycle Tank Kit to clean up and coat the fuel tank in my 1973 VW Ghia. There is a perfect amount of product for a job that size. The chemicals are easy to use, everything you need is included: gloves, stir stick, instructions, etc. I will definitely use this product again if I have a fuel tank to refinish.
  Did you find this helpful?    96 of 98 Found Helpful
Reviewed by:  from Marquez, TX. - 11/26/2012
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.
  Did you find this helpful?    96 of 98 Found Helpful
Reviewed by:  from Murfreesboro, TN. - 6/16/2014
Review Large Cycle Tank Sealer Kit
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