What Is The Best Way To Seal Ductwork?
Flexible or flex duct is an integral part of an air conditioning system. The flexible ducting connects the heating and cooling system ductwork to the air distribution. ... Flex duct is convenient for attaching supply air outlets to more rigid ductwork made from sheet metal
- Pull the end of the flex duct over the end of the collar, pulling the flex duct core at least 2 inches past the raised bead. - Push back the outer liner and insulation. ... - Wrap the nylon draw band around the duct over the inner liner, above the raised bead
Attach flexible HVAC ducts with plastic or metal duct bands or straps. If the flexible ducts have vertical runs, screw in three sheet metal screws around the diameter of the duct directly below the duct straps. For extra durability, brush on mastic over the screwed-down seam
3M Metallized Flexible Duct Tape 3350 is a 3.1 mil thick silver polypropylene tape with an aggressive acrylic adhesive used for sealing flexible ducts and connector systems