3M™ Fire and Water Barrier Tape FWBT3, Translucent, 3 in x 75 ft, 16 Rolls/Case. 3M™ Fire and Water Barrier Tape is an elastomeric fire, water, smoke and sound tape. When installed properly it can act as a barrier to water leakage and airborne sound transmission, while helping to control the transmission of fire, heat and smoke.