ASBESTOS FURNACE CEMENT; IRON CEMENT, WHICH IS A STIFF PASTE FOR SEALING THE JOINTS IN SOIL PIPES AND FILLING CRACKS OR BREAKS IN METAL CASINGS;GAS-RETORT CEMENT, WHICH IS A PLASTIC MATERIAL USED FOR PATCHING GAS RETORTS AND FIRE BOXES; LIQUID ROOF CEMENT, NOW CALLED "ROOF COATING"; PLASTIC ROOFING CEMENT, PASTE, PIPE-JOINT CEMENT, AND PLASTIC STOVE LINING