Grey powder with special cements, easily dispersible resin powders and selected fillers and special additives.When mixed with water the result is supple, self-smoothing mortar which is workable for approx. 20 minutes. The mortar hardens quickly by hydration and drying to become a low- tension compound. AREAS of APPLICATION: Filling, and leveling of concrete, sand cement screeds and other substrates prior to laying floor coverings.Internal use only.