Motsenbockers Lift Off No. 4 Spray Paint Graffiti Remover is the first and only Green Cross Certified paint remover. Biodegradable and water-based, this product is safe for people, the environment and every surface. It works more effectively, or better, in the same time, and costs less per ounce than most solvents. Our secret formula actually breaks the molecular bond between the paint and the surface and is effective for removing graffiti from all types of surfaces including stucco, concrete, trucks, and street signs. It provides superior performance on the most difficult porous surface like natural brick and concrete. Lift Off No. 4 is the first real alternative to anti-graffiti coatings and the continued painting over of graffiti.