3MFire Barrier Duct Wrap

3M(TM) Fire Barrier Duct Wrap 20A, 2 in x 48 in A 2" thick x 48" wide fire resistant wrap consisting of a patented inorganic blanket encapsulated with a scrim-reinforced foil. Used to fire rate commercial kitchen grease ducts and is a proven alternative to 1 or 2 hour fire resistant rated shaft enclosures.