This is a TRE6257 Kwik Seal Activator. 2K Urethane Sealer recommemded to seal surface prior to applying base coat. Seals primers & fillers prior to applying base to eliminate lifting. Apply over old paint, primer, filler, fiberglass, bare metal, aluminum & more. Black 4:1 mix ratio (4 parts sealer to 1 part activator) Thin with urethane reducer.