Pecora AC-20 is a pure acrylic latex sealant that is designed for general purpose interior and exterior caulking in architectural applications where slight to moderate movement is expected. AC20 is formulated with the highest quality components including a silicone additive for much greater adhesion and weather-ability. Pecora AC-20 is completely compatible with premium-grade latex and oil paints and will not stain adjacent surfaces. AC20 has superb color sustainability and is resistant to ultraviolet rays, ozone and airborne contaminants. It is mildew resistant and has the U.S. Department of Agriculture's acceptance for use in poultry and meat processing plants. Pecora AC-20 is also compatible with polystyrene, polyurethane, cork, foamed and fibrous glass and gypsum board. Pecora AC-20 elastomeric properties make it an excellent sealant for caulking interior concrete joints, hollow core ceiling and floor planks, window and door frames, vinyl, aluminum, steel and plywood siding, sheetrock, baseboards and bathroom and kitchen fixtures. AC20 may be used to grout marble and ceramic tile, repair mortar joints, and, under controlled conditions, to bed insulated glass units and storm windows. The Pecora AC-20 + sealant may be painted 30-45 minutes after application with quality grades of latex or oil paints. Cleaning: Water may be used to remove excess sealant from substrate and clean tools before cure. After curing, AC-20 plus must be removed by mechanical means.