Sealing ducts is now recognized as being very important. In fact California, always a bell-weather state, is now requiring duct testing and sealing on most change-outs and new construction. Building ...

Densoseal 16A is based on polybutene, mineral fillers, organic fibers and water displacing materials. It is designed for sealing cable ducts, conduits and service entry pipes or sleeves particularly ...

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 ...