17 cured and uncured rubber for use in lining tanks and for use in covering pulleys and similar types of equipment; Rubber linings for storage tanks, railcar tanks, truck tanks, and reaction vessels; waterproofing materials, namely, rubber waterproof membranes for use on non-metal roofs and basement walls, said membranes not being ready mixed varnishes, paints, and lacquers; flexible non-metallic material in the nature of a sealant, in sheet, roll or strip form, for use in providing a damp-proof course in brickwork, masonry, or concrete walls; self-adhered roofing membranes; waterproof sealant; adhesive sealant for use in roofing