Green Terms Defined: Mastic

In a home with a forced-air heating and cooling system, the system used to distribute air is called duct work. In an average home, 30% of the air sent through the duct work system is lost due to leaks, holes, and poorly executed connections. The result to your wallet is higher electric bills and lower comfort.


The best way to seal up these ducts during construction is using  a paint on mastic or mastic tape. While other tapes fail over time, Mastic stays stuck to your ducts creating an air tight air distribution system.

The benefits of a tight air duct system include comfort, indoor air quality improvements, lower electric bills, and a reduced impact on the environment.

Triple C Camp - NEST Rebuild, 2010

For more information on improving your heating and cooling system, click here and here.