Low-fired clay products immediately after they have been made: e.g. roof tiles, facing bricks, floor tiles, flower pots
Aerated concrete
Gypsum and gypsum-based plasterboards
Light fillers, such as perlite, vermiculites and aerated concrete granules
Insulating materials
Processing
Diluted with water BS-16 is used for impregnating the surface of masonry materials when a suitable means of achieving an adequate, uniform coating, e.g. dipping, is available. The product is not recommended for treating the outside walls of buildings since the necessarily uneven application will give rise to white spots.
Dilution
BS-16 is supplied as a concentrate and is diluted with water before use. Ordinary tap water maybe used. It is best to add the BS-16 masonry water repellent to the water with vigorous stirring.