IMPER 21 mixed with the sealants FUGAMAGICA and ADESIT, completely replacing the water, is used for the following applications: Grouting of floor tiles with large joints and subject to heavy traffic. Grouting of floors to be polished on the spot. Grouting of ceramic tiles installed outdoors or in swimming-pools. Grouting of tiles subject to weak chemical attack (e.g. standard detergents). Mixed with VETROSYSTEM for the outdoor application of glass bricks.