It's a water thinnable acrylic emulsion designed to give a high finish for all interior and exterior surfaces: Concrete Cement, Plaster, Wood. SHIELD ACRYLIC PAINT features an attractive, durable, matte finish that is washable and scrub-resistant. Suitable for interior and exterior surfaces like concrete, cement, plaster, and wood. Apply with a brush, roller, or spray, diluting with water if needed.