17 roofing membranes made of elastomeric derivatives and natural and synthetic rubbers, both cured and uncured and reinforced and unreinforced, some having fire retardant properties; sealing tapes made of elastomeric derivatives and natural and synthetic rubbers both cured and uncured and reinforced and unreinforced, some having fire retardant properties; seam, water cut-off and fastener caulking compounds; pitch pocket sealer for use in roofing applications; walkway pads made of elastomeric derivatives and natural and synthetic rubbers for use in roofing applications; cured and uncured preformed pipe flashing collars made of elastomeric derivatives and natural and synthetic rubbers, both reinforced and unreinforced, some having fire retardant properties, for use in roofing applications; cured and uncured membrane strips, both reinforced and nonreinforced, some having fire retardant properties, for sealing roofing membranes; building insulation made of wood fibers, silicates, fiberglass, polyisocyanurate or other plastic derivatives, synthetic and natural rubbers and elastomeric derivatives, in tapered, extruded, rolled and sheet forms