About Butyl Rubber: The foil tape contains extruded, ever-tacky, and pressure-sensitive Butyl rubber sealant with adhesion strength. It forms a seal against water, air, or dust and remains soft. It is suitable for filling gaps and sealing joints such as those on bolt-on duct flanges and circular ducts in HVAC systems, air-conditioner casings, roofing and cladding systems, caravan roofs and panels, automotive windscreen and tail lights, glass, and metal. PRODUCT FEATURES: Resistant to chemicals, heat, and weather. High tack cold weather adhesive. Good thermal insulation properties. Flame resistant. Adheres well at low temperature. Blocks out moisture and odors. Water and UV resistant. MULTI-APPLICATION: Applicable in electrical, HVAC, and construction industries. Used where moisture and chemical resistance, heat reflectance is required. Withstands different weather conditions. INSTALLATION NOTES: Due to strong stickiness, wear gloves to prevent adhesion to hands. In winter, heat the tape before installation. Do not peel off within 24 hours of application. Do not use with other waterproof materials such as ethylene or silicone. SPECIFICATIONS: Material: Aluminum foil, Butyl rubber. Size: 2 in x 16.4 ft, 4 in x 16.4 ft, 6 in x 16.4 ft. PACKAGE INCLUDES: 1 x Butyl Rubber Tape.