KBS Coatings Auto Fuel Tank Sealer Kit — Seals up to 25 Gallon Tanks, Fuel‑Resistant Single‑Component

KBS Coatings 53000 Auto Fuel Tank Sealer Kit is a complete, single-component system that permanently seals and protects steel fuel tanks up to 25 gallons from rust, pinholes and fuel penetration.

If your vehicle, boat, or equipment has a steel fuel tank that’s been compromised by corrosion or leaks, this all-in-one kit gives you the cleaners, rust remover and the sealer needed to restore and protect the interior without replacing the tank. KBS formulated the sealer to resist gasoline, ethanol blends and many solvents while remaining flexible enough to move with the tank metal during temperature changes and vibration.

How does the kit prepare a rusty tank for sealing?

The kit includes KBS Klean (a water-based cleaner) and RustBlast (a rust remover and metal etch). Together they remove grease, surface oils and loose rust, and produce a clean, etched surface so the sealer bonds reliably to bare metal.

• Heavy-duty degreasing with KBS Klean to remove fuel residues and oils.
• Chemical rust removal and light etch using RustBlast for improved adhesion.
• Instructions and safety gloves included for safe, controlled prep work.

What makes the sealer resistant to fuels and additives?

The Gold Standard Tank Sealer is a single-component, fuel-impervious coating formulated to withstand contact with gasoline, ethanol blends and common fuel additives. Once cured, it forms a continuous film that resists permeation and prevents fuel from contacting corroded metal.

• Single-component formula — ready to use with no mixing required.
• Designed to remain impermeable to gasoline, alcohol additives, and most solvents.
• Flexible finish accommodates thermal expansion and tank movement without cracking.

How effective is the sealer at stopping leaks and pinholes?

The sealer is engineered to seal small pinholes and weld seams permanently by filling and bonding to the metal surface. It creates a continuous lining that restores containment without replacing the tank when damage is limited to surface rust and small perforations.

• Fills and bonds to pinholes and hairline leaks for durable sealing.
• Prevents future corrosion when applied over properly prepared metal.
• Includes step-by-step directions so users can achieve consistent coverage and thickness.

How long will the protective finish last, and how is long-term storage helped?

When applied following kit instructions, the coating forms a long-lasting protective layer that blocks rust recurrence and fuel contact. The included prep products leave a zinc phosphate film that helps stabilize the metal and extends storage life before sealing.

• Prep chemicals deposit a corrosion-inhibiting zinc phosphate layer for added protection.
• Durable coating resists chemical attack and mechanical flexing over time.
• Proper surface prep and cure times are essential for maximum longevity.

Who is this kit made for? The KBS Coatings 53000 Fuel Tank Sealer Kit suits mechanics, restorers, classic car owners, marine maintenance technicians and DIYers who want to repair and protect steel fuel tanks without costly replacement. It’s ideal for tanks up to 25 gallons with surface rust, small leaks or seam issues; for severe structural damage, tank replacement is recommended. Follow all safety and application instructions included in the kit for best results and reliable long-term protection.