DTM 2.1 voc White Urethane Primer & Sealer gallon kit, 4:1 mix SS-2000W/SMR-222 DTM 2.1 voc White Urethane Primer & Sealer gallon kit, 4:1 mix SS-2000W/SMR-222 Direct to metal adhesion, 4:1:1 is also a great sealer