Elephant Snot Graffiti Remover penetrates deeply into concrete, cement, brick, grout, stone, virtually anything porous to dissolve and loosen all types of tags, and in many circumstances, simple water hose pressure will do the job. It is the right choice for the job if the substrate is porous such as: Brick, mortar, masonry, cement, concrete, stucco, landscaping pavers, terrazzo. Natural stone surfaces such as granite, marble, sandstone, porous rocks, both rough and polished. Also effective on: glass, ceramic, porcelain, glazed tile, porous tile, grout. The Elephant Snot can be applied with a thick nap roller or wallpaper paste brush.