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Duct mastic or metal tape is the recommended methodrecommended method for sealing forced air supply ducts. All the cool kids are using mastic these days.
Duct mastic or metal tape is the recommended method for sealing ducts. All the cool kids are using mastic these days.
Duct mastic or metal tape is the recommended method for sealing forced air supply ducts. All the cool kids are using mastic these days.
