The Pecora AC-20+ Sealant is a pure acrylic latex sealant for general purpose interior and exterior caulking in architectural applications where nominal movement is anticipated. Formulated with the highest quality ingredients including a silicone additive for greater adhesion and weatherability, the AC-20 is completely compatible with premium-grade latex and oil paints and will not stain adjacent surfaces. The AC-20 has superb colour stability and resistance to ultraviolet rays, ozone and airborne contaminants. In addition to the substrates listed above, the AC-20 is compatible with polystyrene, polyurethane, cork, foamed and fibrous glass and gypsum board.