Use for roof repairs, flashings, and for sealing seams in metal and composition roofs Woven mesh fabric made of yarns of inert, flexible filaments of pure glass saturated with asphalt Also use in below-grade waterproofing applications, tank-lining systems, and for waterproofing planter boxes Has tensile strength of 75lb./in Acid and heat resistant, and will not rot or decay Complies with ASTM D-1668, Type I Black Size In x Ft=4 x 150