Noopy's Green-Line Gel Paint Remover is safer, faster, and easier to use for removing paint from both porous and smooth surfaces. It may be used on wood, masonry, metal, aluminum, fiberglass, and glass. As a Noopy's Green-Line product, it is biodegradable, eco-friendly, non-flammable, non-caustic--all the while remaining industrial strength. It's easy to apply; just roll it on and spray it off. The Gel will cling to vertical surfaces, with a very low evaporation rate. It can be used for both interior and exterior jobs, and can remove multiple layers of paint.