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POR-15 High Build Primer is a sandable, single-component primer designed for application over cured POR-15 Rust Preventive Coating and topcoats. It allows for quick refinishing and recoating. For optimal adhesion on Rust Preventive Coating, apply when it's dry to the touch but tacky, or scuff with a 320 grit pad beforehand. This primer fills minor imperfections and adheres well to various surfaces including steel, aluminum, and brass. It can be applied by brush, roller, or HVLP spray with a 1.7-2.0 tip. For thinning, use up to 10% POR-15 Reducer.
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