Ready To Use. Good Anti Slump Properties. Good Workability. High Bond Strength. Suitable For Fixing Lightweight Ceramic; Brick; Mosaic; Etc. Not Suitable For Tiling Onto Very Flexible Surfaces. Do Not Use On Unprimed Gypsum Surfaces. Not Suitable For Bonding Two Non Porous Surfaces Together E.G. Porcelain Tiles Onto Steel; At Least One Substrate Must Be Porous.