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Article content provided by Carlisle.

When summer heat pushes HVAC systems to their limits, duct sealing must perform under pressure—literally. Air leaks in ductwork waste energy, strain equipment, and reduce overall performance. That’s why Hardcast® rolled mastic sealants from Carlisle® HVAC Products are the professional choice for demanding environments. They perform reliably in high-temperature, high-pressure conditions. 

Hardcast foil-backed, pressure-sensitive sealants are ideal for commercial, industrial, and residential installations and changeouts. They bond instantly to metal surfaces with no mess and no cure time. Crews can move directly to pressure testing and keep the job on schedule. Each roll features a consistent 17-mil thickness and strong adhesion to galvanized metal, flex duct, and PVC-coated surfaces. The Zero-VOC formula is UV-resistant and approved for indoor and outdoor applications. 

Efficiency Begins with the Right Seal 

• FOIL-GRIPâ„¢ 1402 – Water-resistant, general-purpose sealant with long-term durability 

• FOIL-GRIPâ„¢ 1403-181BFX – UL 181B-FX listed modified butyl joint sealant 

• FOIL-GRIPâ„¢ 1404-181BFX – Strong tack for coated and flex duct surfaces 

Field-Tested. Code-Approved. Contractor-Proven. 

• Bonds instantly in hot and cold conditions 

• No cure time means immediate pressure testing 

• Zero-VOC for better indoor air quality 

• UL 181B-FX and ASTM E84 compliant 

• Resists UV and weather exposure over time
  

Ready to Roll? Let us help you with your next project.

Get a complimentary 100ft roll (Commercial Change Out) or 33ft roll (Residential Install) here:   or email cs@carlislehvac.com.  

Visit the Carlisle HVAC Brands .

Contact a Carlisle HVAC Brands representative.

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.