When Air Management Industries was hired to seal ductwork on a government-owned building in downtown Los Angeles, officials knew standard brush-on sealant wasn’t going to cut it. The exposed, rooftop ...

Q • We had our air ducts tested by Laclede Gas. They failed with a 73 percent leakage. Their contractor is willing to fix the leaks for $1,000. The Earth Ways Center recommends sealing the ducts with ...

Hardcast now has an e-course on duct sealing mastics. This online, educational course covers the different types of mastics, benefits of using mastic, as well as application tips and other useful ...