3M E-FIS 3M™ EXPANTROL™ FLEXIBLE INTUMESCENT STRIP E-FIS IS AN INTUMESCENT TAPE DESIGNED TO SEAL THE AIR SPACES BETWEEN DOORS, FRAMES, AND GLASS TO HELP PREVENT THE SPREAD OF FIRE, SMOKE, TOXIC GASES AND OTHER BY-PRODUCTS FROM PENETRATING INTO ADJACENT AREAS. INTUMESCENT MATERIAL EXPANDS AND FORMS A HARD CHAR WHEN EXPOSED TO HEAT. THIS FLEXIBLE, CONFORMABLE STRIP CAN BE QUICKLY CUT TO REQUIRED SIZES.
3M™ Intumescent Strip, Flexible, Black, 50 ft L x 1/16 in W x 1/2 in THK Dimensions