Revacryl 491 Acrylic ester copolymer Synthomer Acrylics/ Acrylates ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) Revacryl 491 A colloid stabilised, acrylic ester copolymer dispersion. Revacryl 491 is a pressure sensitive polymer dispersion which dries to firm an aggressively tacky form, combining moderate cohesive strength with excellent adhesion to a wide range of substrates. Revacryl 491, on drying, forms a permanently tacky (pressure sensitive) film. The dried film possess very aggressive tack and very goof adhesion to so called difficult substrates with low surface energies. Colloid stabilised, acrylic ester copolymer dispersion. Dries to firm an aggressively tacky form, combining moderate cohesive strength with very good adhesion to a wide range of substrates. Forms a permanently tacky (pressure sensitive) film. Provides very aggressive tack and very goof adhesion to difficult substrates with low surface energies.