Krud Kutter - RSTGR326 Graffiti remover features a nonflammable, water-based formula to provide a safe alternative to hazardous, solvent-based graffiti removers. Highly versatile design is safe for use on most hard, soft and porous surfaces, including aluminum, concrete, freeway signs, plastic, split rock, tile, brick, glass, street signs, vinyl and more. Plus, it's safe for use on clear coat automotive finishes. Graffiti remover is perfect for removing acrylic, enamel, primer, sealers, stain killers, aerosol paint, oil lacquers and more.