Unique three-layer construction of polypropylene film, fiberglass reinforcing scrim and metalized polyester make MB 100 the ideal seaming and sealing tape for VR-R plus insulation backings. MB 100 is mold-resistant and is coated with our high performing cold temperature adhesive, which allows the tape to be applied in temperatures ranging from -20 F to 220 F. Metal building insulation tape Seamless match Non-permeable, permanent bond Able to withstand extreme temperature fluctuations Moisture- and mold-resistant Unique three-layer construction: polyproylene film, fiberglass reinforcing scrim and metalized polyester Applicable Standards: Tested in accordance with UL 723