Ideal Tape's 491 FSK is a pressure sensitive tape manufactured with the FSK Foil, skrim and kraft combined with a pressure sensitive adhesive and release liner. 491D is the same product in circular disc form provided in a continuous roll.
Suggested end use
491 FSK is used for sealing cold and dual temperature duct seams and joints where FSK is the basic insulation facing. The pre-cut discs (491D) are applied over washers and cupped pin heads. They can also be used to cover any accidental punctures in the facing. The discs provide an excellent vapor seal when applied to clean, dry surfaces. Use of applicator (provided) will give best results.
- Performance All Weather Formula adhesive system provides permanent bond to FSK insulation facing
- Scrim layer bends with the primary facing providing integrity to the insulation and a strong, finished, appearance
- Release liner provides easy removal for efficient application on the job site
- Available pre-cut discs reduce on site labor and provide an excellent vapor seal. For best results please use the provided applicator
California residents: see Proposition 65 Warning
Weight 1.7 Pounds (Lb) Width 6 Inches (In) Height 3 Inches (In) Country of Origin USA Length 6 Inches (In) Brand Ideal Tape Adhesion Strength 85 oz./in width Application Temperature 10°F to 180°F (-12.2°C to 82.2°C) Shelf Life 12 months under storage conditions of 60° F to 80° F and 50% relative humidity away from direct sunlight. Storage Temperature 60°F to 80°F (15.5°C to 26.6°C) UV Resistant Yes Tensile Strength 45 lb/in Application Seals Ducts Approvals UL 723 Color Gray Composition Reinforced FSK Functions Used For Sealing Cold and Dual Temperature Duct and Pipe Systems Where the Basic Insulation Uses FSK Facing Maximum Temperature 180°F (82.2°C) Size 3" x 150' Standards UL 723 rated (10/10 Flame/Smoke Rating) Thickness 7 Mils Type Backing: FSK(Foil/Skrim/Kraft); Adhesive: Performance Rubber UL Listed Yes UL Recognized Yes