Professional Flexible Rapid Set+ Grey by Larsen is a specially formulated highly flexible, S1 rated, fast setting, cement based floor and wall tile adhesive. It is suitable for fixing porcelain, ceramic & dark coloured natural stone tiles and is recommended for use on more demanding substrates such as heated screeds, swimming pools and overboarded timber floors. This adhesive is capable of a bed thickness of 3-12mm and up to 20mm in small isolated areas making it ideal for fixing large format tiles. Gypsum Plaster must be sealed with Larson Acrylic Primer prior to the application of cement based adhesives. 20 kg covers approx 5 sqm2.