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Polyken 1787630 2" Foil Mastic Tape UL181B-FX Listed
- Thick 17 mil tape for permanent airtight seals Printed for easy inspection Evaluated by SMACNA Testing & Research Institute for performance on rigid sheet metal systems up to 10" w.g. UL 181 B-FX Listed 48mm x 31M (1.89in x 33.3yd)