• Nashua 360-17 FoilMastic Butyl Rubber Tape is a printed, 2 mil dead-soft aluminum foil backing with a 15 mil butyl rubber mastic adhesive. It is a waterproofing repair tape used for indoor or outdoor sealing of low, medium & high-pressure HVAC duct systems (includes: metal duct, fiberglass duct, and flexible duct systems).
• It seals cracks and seams in gutters, roof valleys, eaves, hips and ridges and seals around chimneys and vent stacks. You can use Nashua 360-17 to repair gouges, rips, tears in metal panels of trailers, shipping containers, and metal buildings. Also used to seal leaks in vans, cars, and trucks and for mobile home repair.
• Use duct mastic to mend poorly sealed connections, improve indoor air quality (since fewer pollutants circulating), lower utility bills, and burn fewer fossil fuels.
• Features and benefits include permanent sealant, provides an instant watertight bond, acceptable for use on galvanized materials, heavy-duty all-weather foil coated butyl mastic, excellent adhesion to all surfaces, extremely conformable, non-staining adhesive, paintable 2 mil foil backing (use in place of caulk), excellent resistance to cold, heat, water, and sunlight, and more.
• Certifications: Tested in accordance with UL 723 and CAN/ULC-S102-10; can contribute toward satisfying EQ Credit 4.1 (Low Emitting Materials) under LEED.

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