In 2018, CMC acquired ECS Aeroseal, enabling us to expand the breadth of energy-efficiency services for homeowners and businesses in Connecticut. Aeroseal is a breakthrough duct sealing technology that offers the first and only fast, safe and highly effective way to seal duct leaks.

This innovative technique is an easy, less expensive way to attain ideal HVAC performance for homes and businesses and meet stringent building code requirements in new construction and retrofit projects.

When applied to the interior of ducts and vents, the Aerosol sealant seeks out leaks and forms a bond around a hole until it is completely sealed. By contrast, using tape or mastic means the leaks have to be reached and sealed by hand – and the seal is only temporary at best.

Eliminating the need to manually identify individual leaks, tear into walls, or strip away insulation, a job can be completed in a matter of hours – not weeks or months.

There’s no denying the results: The U.S. Department of Energy calls Aeroseal one of the most beneficial energy technologies for American consumers.


Learn more about Aeroseal:

For Your Home      For Your Business

Benefits of Aeroseal

Real Savings

Average 95% reduction in leakage can mean hundreds in annual savings on annual heating and cooling.

Better Performance

Realize a reduction in HVAC power requirements by 40% or more – putting less strain on and extending the life of your systems.

Improved Air Quality

Tightly sealed air ducts means allergens, dust and dirt will no longer be pulled into your systems through leaks and gaps.

Fast & Easy

Aeroseal is completed in a matter of hours with little disruption – and you’ll feel the results immediately.


The non-toxic sealant reduces wasted energy, increases the efficiency of your building and is 100% non-toxic.

Aeroseal - picture system graphic new

How it Works


Measure & Test

All ductwork vents and registers are temporarily blocked to pressurize the system. This allows the technology to find all of the cracks and holes where air is leaking. A large flexible air tube is connected to the ductwork and air is blown through to measure the pre-seal air leakage.


Seal Leaks with Aeroseal

Microscopic particles of sealant are sent throughout the duct system. When they come to a leak, the particles cling to the edge of the leak and then to other sealant particles, bonding to each other until the leak is fully sealed. The technology is so precise that we only use the amount of sealant necessary with virtually no waste and very little cleanup.


Review Performance Report

The computerized sealing system provides complete real-time monitoring of the process, with visualizations of the sealing as it occurs and the reduction rate of escaping air. A final report is generated, providing a before and after analysis of system performance. Feel the difference right away.

Schedule an assessment by calling 888-363-4978 or click to contact us.

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