Butyl Flashing Tape

Imus Seal is a self-adhering 20-mil thick flashing tape that can be applied in temperatures ranging from 20 degrees to 180 degrees F. The US-made tape combines a pressure-sensitive 12-mil butyl waterproof membrane with a high-density polyethylene backing for strength, and according to the manufacturer meets AAMA 711 performance standards. While it’s designed to be used to protect deck joists and beams, the tape is currently available only in 1 5/8-in. x 50-ft. rolls directly from the manufacturer for $16.99 per roll (wider 3 1/8-in. x 50-ft. rolls are currently out of stock). imusindustries.com.