TT-P-620C, FEDERAL SPECIFICATION: PRIMER COATING, CONDITIONER FOR CHALKING EXTERIOR SURFACES (11-OCT-1968) [S/S BY A-A-3161]
TT-P-620C, FEDERAL SPECIFICATION: PRIMER COATING, CONDITIONER FOR CHALKING EXTERIOR SURFACES (11-OCT-1968) [S/S BY A-A-3161]., This specification covers a penetrating surface conditioner to give good intercoat adhesion between a chalked porous substrate and a top coat.