POR-15 Fuel Tank Sealer 128 fl oz - Permanent Rust & Leak Protection

In this review the POR-15 Fuel Tank Sealer is evaluated for anyone restoring a car, truck, or motorcycle who needs a single-coat solution to stop rust and pinhole leaks. The biggest reason to buy is its formulation that claims a permanent, fuel-impervious coating that resists modern fuels and alcohol blends, making it a practical choice for long-term tank restoration when applied after proper cleaning and prep.

Key Features

• Fuel resistance: Formulated to remain impervious to all fuels and additives, including high-alcohol Stage II blends, for reliable protection.
• Permanence: Designed as a permanent seal that aims to stop rust, corrosion and small leaks with a single application when used correctly.
• Strength: Laboratory-developed chemistry provides superior strength to resist cracking and chemical attack from fuel and additives.
• Application guidance: Intended for use after draining and thorough cleaning with a cleaner degreaser and metal prep, which helps the sealer adhere to metal.
• Restoration use: Suited to automotive restoration projects where renewing an existing tank without replacement is preferred.

Who It's For

The POR-15 Fuel Tank Sealer is best for DIY enthusiasts and professional restorers who can remove a tank, perform a full cleaning and prep, and allow proper cure time for a durable finish. It is most valuable when a permanent, fuel-resistant lining is needed to stop pinhole leaks and arrest corrosion from the inside out.

Those who should look elsewhere include people who cannot remove a tank for proper cleaning or who expect a guaranteed fix without following the recommended prep steps; adhesion problems and failures reported by some customers usually trace back to insufficient cleaning or prep before application.

Pros & Cons

Pros

• Stops rust and small leaks when applied after correct cleaning and prep.
• Resistant to modern fuels and alcohol blends, reducing risk of fuel breakdown.
• Single-coat application simplifies restoration compared with multi-step liners.
• Backed by a brand known for rust prevention chemistry.

Cons

• Requires thorough tank removal, cleaning, and metal prep or the coating may not adhere and can peel.
• Some users report inconsistent durability, so results depend heavily on preparation and application technique.

Specifications

Our Verdict

POR-15 Fuel Tank Sealer is a sensible choice for restorers who will remove and thoroughly clean a fuel tank prior to coating; its fuel-impervious chemistry and single-application design offer good value when applied correctly. Buyers should follow the recommended prep steps closely to avoid adhesion issues and get reliable, long-lasting protection.

Frequently Asked Questions

Can this handle ethanol blends?
Yes, the formula is designed to be resistant to higher-alcohol Stage II fuels and common additives.

Do I need to remove the tank before using?
Yes, the product is intended for tanks that are drained and removed so they can be thoroughly cleaned and prepped for good adhesion.

Will one application fix pinhole leaks?
When applied after proper cleaning and metal prep, a single correct application is intended to seal pinhole leaks; poor prep can cause failures.