The manufacturer of these aluminum-filled repair epoxies say they are ideal for hvac applications. FasMetal 10 Hvac Repair Paste and Aluminum Putty F cure at room temperatures and withstand temperatures up to 2508F and a broad range of chemicals. FasMetal bonds to metals, ceramics, wood, concrete, glass and more. Aluminum Putty F bonds to metal or concrete.

Devcon, 30 Endicott St., Danvers, MA 01923; (800) 933-8266; fax (978) 774-0516.