Safely Sealed for Life® Providing superior products and engineered solutions to ensure the sustainability of your HVAC system. Our formulations include U.L. listing, U.L. GREENGUARD Gold certification, True Zero VOC content and 10 Year Warranties. Duct Sealing and Airflow Management systems that exceed industry standards and are engineered to ensure fast, consistent, and accurate installation. Our products and solutions deliver maximum efficiency, unparalleled quality, and unmatched savings, and to ensure these goals are met, we provide thorough training and field support.

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EPDM Gasket

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Product Details

The Hardcast Four-Bolt Connection System is designed to provide a simple and effective means of connecting rectangular duct sections together. This connection system may be used on all rectangular ducts from 14 GA to 26 GA, resulting in sealed joints with clear lines that are aesthetically pleasing.