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Top 9June 2025

Best Liquid Plastic Gas Tank Sealer

We made a list of the top 9 Liquid Plastic Gas Tank Sealer based on verified reviews, popularity and other factors which we summarized for you in this list.

Best Choice

RED KOTE FUEL TANK LINER, GAS TANK SEALER, FUEL TANK SEALER 1 QT. STOPS RUST, CORROSION AND LEAKS

RED KOTE FUEL TANK LINER, GAS TANK SEALER, FUEL TANK SEALER 1 QT. STOPS RUST, CORROSION AND LEAKS

✓This tank sealer is a polymer coating resistant to gasoline, diesel fuel, alcohol and other fuel additives, it's major use is to seal leaking fuel tanks (1 Qt will seal metal tank up to 14 gallon)
✓Easy to use if the directions are followed closely. It seals the of small leaks that often form, you fix the obvious leaks and the sealer seals the rest
✓Contrary to what some people will tell you, rust does form inside gas tanks. The cause is condensation and water in gas.
✓This sealer seals rust under the coating so it cannot flake off to plug fuel-line filters or cause engine damage. Further rusting is reduced also.
✓The coating is very flexible and does not crack as do some of the others. This gives the repair a much longer life.
✓The polymer was specifically chosen because of its tight adhering qualities. In comparison to some other coatings, this tank sealer does not peel off even when the metal is bent. This protects against loosening of the coating by vibration or denting of the tank.
✓Holes up to 1/32nd may be coated and sealed safely. Rust is sealed in so that it cannot flake off.
✓Tank can be cleaned with and the sealer can be thinned with M.E.K. (methyl ethyl ketone)

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18% Discount

J-B Weld 8217 TankWeld Gas Tank Repair - 1 oz.,Dark Grey

J-B Weld 8217 TankWeld Gas Tank Repair - 1 oz.,Dark Grey

✓Hand-mixable, steel-reinforced, non-rusting epoxy putty that quickly repairs or rebuilds anything made of metal
✓Great for gas tanks, radiators, lawn and garden equipment, water tanks and all metals
✓Sets in 5 minutes and fully cures dark grey in 1 hour with a tensile strength of 900 PSI
✓Once cured, it can be drilled, tapped, machined, ground, filed and painted and will withstand temperatures up to 300ºF
✓J-B Weld is proudly made in the USA

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KBS Coatings 5200 Gold Standard Tank Sealer - 8 fl. oz., Silver

KBS Coatings 5200 Gold Standard Tank Sealer - 8 fl. oz., Silver

✓Package Dimensions: 7.62 H x 7.62 L x 7.62 W (centimetres)
✓Country of Origin : United States
✓Package Weight: 0.226 kilograms
✓Flash point: 40.0

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6% Discount

POR-15 Fuel Tank Sealer, Stops Rust, Corrosion and Leaks, Resistant to All Fuels, Alcohols and Additives, 8 Fluid Ounces

POR-15 Fuel Tank Sealer, Stops Rust, Corrosion and Leaks, Resistant to All Fuels, Alcohols and Additives, 8 Fluid Ounces

✓For Metal Fuel Tanks
✓Non-Porous Sealant
✓Stops and Prevents Rust
✓For Use Inside Fuel Tanks

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20% Discount

KBS Coatings 52000 Cycle Tank Sealer Kit, Complete Kit - Seals Up To 5 Gallon Tank, Lightly Pigmented Silver

KBS Coatings 52000 Cycle Tank Sealer Kit, Complete Kit - Seals Up To 5 Gallon Tank, Lightly Pigmented Silver

✓The KBS Cycle Tank Sealer Kit contains everything needed to seal a tank of up to 5 gallons
✓Includes KBS Klean, Rust Blast and Tank Sealer
✓Permanently seals pinholes & weld seams
✓Once cured, Impervious to all modern day fuels, alcohol additives & most solvents
✓Flash point: 40.0 degrees_celsius

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10% Discount

KBS Coatings 52050 Large Cycle Tank Sealer Kit, Seals Up to 12 Gallon Tank

KBS Coatings 52050 Large Cycle Tank Sealer Kit, Seals Up to 12 Gallon Tank

✓The KBS Large Cycle Tank Sealer Kit contains everything needed to seal a tank of up to 12 gallons. It is an All Inclusive Kit!
✓This Kit Includes KBS Klean, RustBlast, Tank Sealer, Gloves and Complete Directions.
✓The Tank Sealer Permanently seals pinholes & weld seams and is Impervious to all fuels, alcohol additives and most solvents.
✓This Kit eliminates all rust and corrosion meaning no clogged fuel filters.
✓The Tank Sealer is flexible and able to expand and contract with your tank.

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10% Discount

Super Glue Pro Seal N62020 Instant Gas Tank and Radiator Repair

Super Glue Pro Seal N62020 Instant Gas Tank and Radiator Repair

✓Instant Gas Tank and Radiator Repair
✓0.7-Ounce strip
✓Easy to use putty
✓Permanently seals cracks and split seams
✓Hardens like steel

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Blue Magic 6522KTRI QuikSteel Plastic Tank Repair Kit , White , 2 ounces

Blue Magic 6522KTRI QuikSteel Plastic Tank Repair Kit , White , 2 ounces

✓Manufacturer: BLUE MAGIC
✓Country of manufacture: United States
✓Part number: 6522KTRI
✓Included components: Unit, Instruction Guide

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Permatex® Plastic Tank Repair Kit

Permatex® Plastic Tank Repair Kit

✓State-of-the-art components
✓Increase visibility during heavy rain, snow, fog and night time driving
✓Easy-to-follow instructions with photographs
✓Suggested Applications: windshield washer reservoirs, radiator overflow tanks, coolant reservoirs, water tanks, waste tanks *Not for use on plastic fuel tanks

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