AC 145 A. C. Tech Adhesion Promoters Polysulfides SEALANT AC-145 Adhesion Promoter AC-145 is an adhesion promoter, for polysulfide sealant used on metal and/or solvent-resistant coatings. It contains mixed solvents blended with a surface activator agent. Adhesion promoter. Contains mixed solvents blended with a surface activator agent. Used for polysulfide sealants used on metal and/or solvent-resistant coatings.