... mat 4.battery separator mat 5.facing mat S-BM Surface TissueFiberglass Surface Tissue is mainly used for glass ... is divided into wrap type S-BM (w) series, hand lay-up-type S-BM (H) series,and pultrusion- ... type S-BM (P) series of three categories. Main ... layer 5, Good anti-aging, corrosion resistance S-BM fiberglass surface tissue for FRP products