EVO-STIK Fast Set Floor & Wall Tile Adhesive for Wood, Concrete & Plaster is a cement based, flexible tile adhesive that will set in just 2 hours.Its formula is waterproof and frost resistant, making it suitable for interior and exterior use. It has been specially developed for fixing ceramic, porcelain, natural stone, quarry, slate, granite, terrazzo and vinyl tiles.The adhesive can be applied directly onto cured concrete and screeds, onto plaster and plasterboard, over tiles and onto wood. It is also suitable for use with most domestic underfloor heating systems.