SOFT Duct Wrap FRK is a blanket of glass fiber insulation factory-laminated to FRK vapor retarder facing.  A 2" stapling and taping flange is provided on one edge.   USE: Used for external insulation of commercial and residential heating, air conditioning and dual temperature ducts operating at temperatures from 40 Fahrenheit to 250 F.  When applied in accordance with installation instructions, it will provide the "installed R-value" as published for the product and printed on the facing, assuring specified in-place thermal performance and condensation control.