How to Seal an HVAC Duct with Mastic - Duct Sealant

[HowToHomeInsulation]

Thanks for the comments!

For years, HVAC installers have been using DUCT TAPE to air seal the joints in duct work. Strangely enough, duct tape is not made for working on ducts because the glue can not handle the heat.

Energy Star estimates most homeowners lose 20% of the money they spend to heat and cool their homes because of leaky ducts. The air disappears into the walls and attic spaces without reaching your living space.

This is a cheap way to save money and make your rooms comfortable.

[BereanStudent]

Yet another neat and informative video. I did not consider air leaking from duct work.

[freepamia]

very helpful

[gregory747]

ok great job

[californiamusic]

Good stuff. Thanks!

[uceid]

Great tip, This one is going to be useful for my basement!