Bostik A150 Super-Grip Wall Tile Adhesive is designed for fixing ceramic wall tiles (up to 300mm x 300mm x 8mm or equivalent) to plaster, plasterboard or tile backer boards. It should not be used for fixing onto floors. The main use for Bostik A150 Super-Grip Wall Tile Adhesive is for fixing of ceramic wall tiles to kitchens, toilets, domestic showers and bathrooms. If you are using large format tiles the drying time will be greatly extended. It should not be used externally or in areas where tiling is continuously immersed in water, e.g. swimming pools. For these applications use a Bostik cement based adhesive.