IKO Modiflex MF-95-FS-Base Fully Adhered Base Sheet is constructed of an inorganic reinforcing mat of high strength non-woven glass fibers that is coated top and bottom with select SBS polymers and premium quality asphalt. The top surface of the product is covered with a thin micro-perforated film, which disappears upon heat welding, while the underside is sanded to allow installation via mopping asphalt or an IKO-approved cold process adhesive. Modiflex MF-95-FS-Base can be used as the “lay-flat” base sheet in a two-ply modified bitumen system.