DTM 2.1 voc Grey Urethane Primer & Sealer gallon kit, 4:1 mix, SS-2000G/SMR-222 Direct to metal adhesion, 4:1:1 is also a great sealer This sale is for a gallon of SS-2000G, grey DTM primer and a quart of SMR-222 activator; which yields 5 quarts of spray able DTM primer. SS-2000 is 2.1 voc compliant. - 4:1 Mix for DTM primer - 4:1:1 Mix for DTM sealer (use SMR-0065, SMR-0075 or SMR-0085, sold separately on Ebay) - Great metal adhesion and corrosion protection - Fast dry and easy sanding - Excellent color/gloss holdout and sealing properties