Perfect for HVAC, Duct, Pipe, Insulation and More. The Perfect Sealing Solution - This tape creates a more energy-efficient HVAC system by quickly sealing air ducts to prevent leakage. Hot or Cold: Our tape functions efficiently in moist and extreme temperatures without any concern of peeling off. TOP QUALITY: Made in USA airtight, permanent, temperature resistant and waterproof seal tape. VARIETY OF APPLICATIONS: Sticks to virtually anything (High or Low Temperatures). Aluminum seams and joints, sheet metals, fibrous and metal ducts, aluminum backed duct boards and many others.