DetailsShurMASTIC® indoor/outdoor roll mastic used for air-tight and moisture-free sealing of Class 1 Flex Duct, sheet metal, PVC coated duct and duct wrap vapor barriers. Approved for subgrade application on PVC coated duct.
- UL 181B-FX Listed
- Pressure Classes SMACNA 1/2, 1,2,3,4 & 6
- Seal Class A, B, C
- Tested in accordance with UL 723; FSI 15/SDI 10
California residents: see Proposition 65 Warning
Weight 2.29 Pounds (Lb) Width 6.75 Inches (In) Height 2 Inches (In) Country of Origin USA Length 6.75 Inches (In) Brand Shurtape® Adhesion Strength 111 oz./in Application Temperature 35°F to 110°F (1.6°C to 43.3°C) Shelf Life 1 Year Storage Temperature Tape should be stored in its original packaging in a cool, dry area away from direct sunlight UV Resistant Yes Tensile Strength 23.8 lb/in Application Seal Class 1 Flex Duct And Sheet Metal. Indoor And Outdoor Approvals UL 181B-FX Color Silver Composition Foil backing, butyl rubber adhesive Functions ShurMASTIC® butyl foil tape used for airtight and moisture-free sealing of Class 1 Flex Duct, sheet metal, PVC-coated duct and duct wrap vapor barriers, and is also approved for subgrade application on PVC-coated duct. A paintable, UL 181B-FX Listed masti Maximum Temperature 200°F (93.3°C) Size 2" x 100' Standards UL listed Thickness 17 mil Type Roll Mastic UL Listed Yes UL Recognized Yes