Mapesil T is a professional-grade, 100%-silicone sealant for use on multiple substrates. This product is specifically formulated for heavy traffic and expansion/movement joints and meets ASTM standards. Features: Formulated to a low sheen to match the gloss of grout joints 100% silicone for use in interior, exterior, wet and dry installations from Res 1 to 7 and Com 1 to 7 as detailed per TCNA Environmental Classifications Excellent elongation and flexibility for use in both change-of-plane and joint applications in tile or stonework