Yes, KBS Tank Sealer can be used on rigid plastic and polyethylene gas tanks. Because plastic needs a different surface prep than metal, a modified process adds Fusion SEP as an adhesion promoter before the Tank Sealer step.
The plastic tank process in brief:
- Clean the inside of the tank thoroughly with KBS Klean, rinse completely, and let it dry until completely bone dry.
- Pour Fusion SEP into the dry tank and rotate until every surface is evenly coated. Work it for up to 15 minutes, then drain out all excess. Fusion SEP is designed to go on as a very thin film. Do not apply additional coats.
- Apply Tank Sealer following the standard Step 3 directions, rotating slowly and evenly to avoid letting it puddle in low spots.
Full directions: This page covers the plastic tank process at a glance. For the complete step-by-step walkthrough, technical data, and cleanup instructions, see the full Plastic Tank Sealer Directions.
Frequently Asked Questions: Sealing a Plastic Tank
Yes. For rigid plastic tanks, KBS Tank Sealer coats and seals the interior of the tank to protect against fuel weeping or leaking. Because plastic requires different surface prep than metal, a modified 3-step process is used with Fusion SEP as an adhesion promoter before applying Tank Sealer.
Fusion SEP is a primer etch formulated for plastic tank interiors. It prepares the plastic surface to accept Tank Sealer by creating the adhesion bond between the plastic and the coating. It is designed to work as a thin film only, so drain the excess immediately after coating the tank and do not apply additional coats.
Yes, the same as a metal tank. Clean the inside of the plastic tank thoroughly with KBS Klean, rinse completely, and let it dry until it is completely bone dry before moving on to Fusion SEP. Any remaining moisture will prevent the Fusion SEP from bonding properly.
Still have questions about sealing a plastic tank? Contact us for help.
