Don't Just Tape It, Seal It!

Did you know that improper sealing of ductwork results in 24–40% loss in HVAC Systems?

Article content provided by Carlisle HVAC.

Leakage is serious — it affects air quality, can reduce system capacity and the life of an HVAC unit. To reach maximum efficiency, you need a seal that lasts.

Hardcast^® rolled mastic sealants are designed to seal metal or flexible duct work for the life of the system. These foil-backed, pressure-sensitive, Zero-VOC sealants bond to metal instantly with no mess or cure time−and you can perform pressure tests right away! Try it today.

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Carlisle HVAC Brands is a unified family of the best HVAC products and solutions. Dynair, Hardcast, and Gripnail are storied brands with a history of high-quality products and high-quality customer service. These products help you meet requirements by providing not only the longest lasting duct sealing options, but also the best airflow management hardware. Ask us how we can help you make your HVAC system perform at peak efficiency.

Nov 14, 2025 — Products & Services Update

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