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Home > Tank Sealers

Tank Sealer Kit for 25-50 Gallon Tanks

review 17 Reviews +See Reviews
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Tank Sealer Kit for 25-50 Gallon Tanks

A money-saving 3-Step repair kit which includes enough products to clean, prep & permanently seal up a 25-50 gallon tank. Detailed instructions included. Satisfaction guaranteed!

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Part #: 53010
(+See 3 Questions)

25-50 Gallon Tank Sealer Kit Overview

Tremendous Value

KBS Klean Gal: $22.95
RustBlast Gal: $33.95
2 Tank Sealer Qts: $79.90
Nitrile Gloves: $0.50

Total: $137.30
Only: $129.95
Your Savings: $7.35!

The KBS Tank Sealer Kit contains everything you need to seal a tank of up to 50 gallons.

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

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 to leave a zinc phosphate film.

NOTE:This Kit should work for an average 25-50 gallon tank. Coverage will vary based on application, condition of tank, substrate of tank, and other factors.

25-50 Gallon Tank Sealer Kit Contents

  • Gallon of KBS Klean
  • Gallon of RustBlast
  • 2 Quarts of Gold Standard Tank Sealer
  • Nitrile Gloves
  • Stir Stick
  • Detailed Instructions

25-50 Tank Sealer Kit Features

  • 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 • Diesel 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
Search the Tank Sealer
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: Hello, will this product work to coat the inside of a hydraulic tank? We are looking for something to keep a new tank from rusting.

Asked by:  - 10/17/2013

A: Yes, the Tank Sealer is impervious to hydraulic fluid. For a hydraulic tank, make sure you clean the tank really well with the KBS Klean to get rid of all of the residue.

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

Q: can this be used with both leaded, and E85 110 octane and up race gasoline ??

Asked by:  - 6/6/2014

A: Yes, the Gold Standard Tank Sealer will withstand E85, leaded fuel, and racing fuels.

Was this answer helpful?   8 of 8 Customer(s) found this Answer helpful.

Q: I need to seal a diesel tank for my sailboat. Recently, the outside temperature has been in the 20s. Whats the lowest tempeature that I can use the product? Also, can i use it in the basement of my house or are the fumes too much. Thank you for your help Doug

Asked by:  - 12/13/2013

A: It is best to use our products between 55 and 82 degrees Fahrenheit.

Also, the Tank Sealer does require fresh air, so we do not think it is a good idea to do the Tank Sealer step in your basement.

Was this answer helpful?   6 of 6 Customer(s) found this Answer helpful.

Customer Reviews - Others Say It Best +See All Reviews
review 17 Total Reviews Sorting:
Rating Amazing product, Great company
This has to be the best product for fixing a leaky fuel tank. Nothing has ever worked this well for us.
  Did you find this helpful?    56 of 57 Found Helpful
Reviewed by:  from Riverton Wyoming. - 1/26/2012
Rating Amazing product!!Saved me $1000.00
excellent product!!
  Did you find this helpful?    44 of 45 Found Helpful
Reviewed by:  from Phila. - 4/26/2011
Rating Fantastic Product
I had a severly rested steel gas tank. it was so bad it sounde like there was sand in it. After washing out all the loose rust, even though this tank had been sitting enpty for several years it dissolved the fuel residue that had dried on. The rust blaster did a great job of removing the rest of the rust, and the coating finished the job. I can use my old truck now! Thanks for a great prpoduct.
  Did you find this helpful?    25 of 26 Found Helpful
Reviewed by:  from Missouri. - 8/2/2015
Rating Saved me $1000.00
It took a lot of work to get the gas tank back in shape but it was worth it because this was a 40 gallon tank for motorhome and no one makes a replacement. This product savec the tank and me alot of money.
  Did you find this helpful?    25 of 30 Found Helpful
Reviewed by:  from FLORIDA. - 10/30/2014
Rating Sealed My Tractor Tanks
Sealed my leaking tractor tank. The directions were great and easy to follow. The tech support when I called with a question was also very helpful.
  Did you find this helpful?    19 of 20 Found Helpful
Reviewed by:  from Monroe, LA. - 8/17/2011
Rating Tank Sealer Kit - For 2001 Ford F450 7.3L Diesel
Remove Fuel Tank from Truck Inspect for Ford Diesel Fuel Tank delamination = Mine had small particles Take to radiator Shop to Boil Tank NOW ready for KBS 3 Step Tank Sealer kit Follow each step carefully Outstanding Finish / Result PLUS its BioDiesel approved by KBS
  Did you find this helpful?    1 of 1 Found Helpful
Reviewed by:  from Colfax NC. - 7/31/2015
Rating Quality product,eazy to use
Sealed a 33 gallon fuel tank once diesel now baffled and gasoline.Also painted with rust coat on exterior of tank and it layed out extremely well for using a paintbrush.
  Did you find this helpful?    1 of 1 Found Helpful
Reviewed by:  from Woodinville WA. - 4/2/2012
Rating The Easy Part
I installed the tank sealer in an old tractor that the tank could not removed from. After days of removing rust the rust treatment and sealer as the easy part (applied by brush). Works great!
  Did you find this helpful?    1 of 1 Found Helpful
Reviewed by:  from Walsenburg, Colorado. - 7/28/2012
Rating Great Product
very easy to apply and worked very well
  Did you find this helpful?    1 of 1 Found Helpful
Reviewed by:  from Baltiore Md.. - 1/2/2013
Rating Excellent Product!
Excellent product! Worked as advertised! Love it!
  Did you find this helpful?    1 of 1 Found Helpful
Reviewed by:  from Red Oak, Texas. - 2/2/2013
Review Tank Sealer Kit for 25-50 Gallon Tanks
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