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The HARDCAST Duct-Seal 321, MPN 322674, is a water-based duct sealant suitable for sealing ductwork effectively. It comes in a one-gallon pail, making it easy to store and apply. Apply this sealant to prevent air leaks in duct systems, enhancing energy efficiency.
This duct sealant is water-based and ideal for HVAC applications. Use it for various sealing needs.
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