Sunnyside Back to Nature Ready-Strip Mastic Remover, Gallon, 678G1 Capable of removing several layers of mastics and adhesives Use on interior and exterior surfaces including wood, plaster, concrete, stone, brick, metal and veneers Environmentally safe, biodegradable formula User friendly; easily cleaned-up with water Easy to apply with a brush, putty knife, squeegee or 1/2" nap paint roller Coverage is approximately 50-75 square feet / gallon