Nashua 398 All-Weather Duct Tape is 11-mils thick and offers durability and adhesion for even the toughest household and contractor applications. Durable bond in all weather applications. Nashua Trusted Tapes get the job done right, the first time, every time. Ideal for indoor/outdoor seal, patch, and bond applications as well as household repairs, and HVAC duct sealing. Hangs and patches polyethylene sheeting in all weather conditions. Seals hvac ducts and ventilation systems and stands up to all weather conditions. Performs well in numerous maintenance applications in manufacturing environments. Tough, conformable polyethylene-coated cloth backing offers all-weather endurance. Thick, natural-rubber adhesive is ideal for multi-surface and provides a durable bond. Low VOC (volatile organic compounds) content.