Mapei Ultracare Grout Release - Pre-Grouting Stain Resistant ProtectorPre grouting Stain Resistant protection of porous materials ULTRACARE GROUT RELEASE is a stain resistant protector specific for thin polished ceramic tiles and porous materials. It is used as pre grouting treatment (for cementitious grouts) to reduce the risk of staining and facilitate cleaning. ADVANTAGES: Interior and exterior floor and wall Quick and simple application Uv resistant Suitable for cementitious grouts Ready to use, easy to apply