Amazon.com has ELK Aluminum Foil Tape for Metal Repair, Air Ducts, Insulated Pipes, HVAC, Sealing Ductwork – Vapor, Exhaust and Heat Resistant Safe – Professional Grade Insulation Sealer (Silver, 1.88 in x 150 ft) on sale for $4.99.
- INDUSTRIAL GRADE: High quality, high tensile strength aluminum foil coated in epoxy resin with strong, cold weather solvent acrylic adhesive set on a easy release silicone paper liner to preserve the adhesive and provide ease of use.
- APPLICATIONS: Ideal for sealing hot and cold air ducts, AC, PVC, duct insulation systems, seal and seam aluminum, stainless and plastic seams and joints, temporary repair of metal surfaces, plumbing, heating vent, copper pipe fixing, attic, crawlspace, crafts and more.
- DURABLE: This heavy duty waterproof foil tape resists flames, moisture, vapor, UV degradation, odor shield, weather, some chemicals and smoke transmission. For both indoor and outdoor use. Chemically resistant, thermally conductive, heat and light reflective.
- EFFICIENCY: Thermal conductivity helps cooling and heating efficiency, improving efficiency in systems. Provides a strong bond at low and high temperatures. Conformable backing and pressure sensitive adhesive means it will adhere properly to a variety of smooth and irregular surfaces.
- GREAT VALUE: 1.88 inch wide x 150 feet (50 yards) long x 2.7 mil thick foil roll. Ensure that surface is clean, dry, free of grease, oil or other contaminants before applying metallic aluminum foil tape. Finish work with quality and speed.