Buildplast HQ is a dry pre-mixed; cement-silica based water repellent plaster for indoor and outdoor applications. Manufactured to strictly controlled specifications & supplied as a ready mixed powder that requires only the addition of water on site for indoor and outdoor applications. It can be applied on any masonry surface from 10 to 40mm thickness. It is classified as type GP CS IΙ, W1 mortar according to ΕΝ 998-1.