Aquamac 542 Styrene Acrylic Latex Hexion Specialty Chemicals Acrylic Resins >> Styrene/ acrylic copolymer >> Emulsions/ Dispersion Coatings Architectural / Decorative >> Interior wall coatings Architectural / Decorative >> Exterior wall coatings Aquamac 542 is a thermoplastic styrene acrylic latex designed specifically for use in interior and exterior stain-blocking primers. Primers formulated with this resin typically have excellent tannin block and adhesion as well as very good ink block and stability with zinc oxide. Styrene Acrylic Latex. Used for exterior and interior stain-blocking primers. Exhibits very good tannin block and adhesion. Provides very good ink block and stability with zinc oxide.