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Aeroseal Homeseal

Aeroseal Process

Aeroseal Duct Sealing is a patented breakthrough technology that tackles leaks from the inside out. Aeroseal software allows the technician to accurately measure the duct leakage in residential homes and commercial buildings. The Aeroseal process puts escaping air under pressure and causes polymer particles to stick first to the edges of a leak, then to each other until the leak is closed.

The technology was developed within the Indoor Environment Program at Lawrence Berkeley National Laboratory, whose IAQ scientists tested it. The research was funded by US Environmental protection agency, US dept. of Energy, Electric Power Research Institute and California Institute of Energy and Environment.

The University of California was granted initial patents in 1996 and 1999, and Aeroseal holds an exclusive license to the technology.


While energy savings resulting from reducing leakage vary based on climate, utility rates, and your heating and cooling system, the other goals of even temperatures in all rooms, improved indoor air quality, and reduction of odors and fumes will be achieved regardless of those conditions. In commercial building applications, Aeroseal also solves air flow and ventilation issues in addition to energy savings.

The Aeroseal 6-step process takes very little time to bring you big savings and comfort:

  • Wall registers are covered in order for air to escape only through the leaks
  • Sealant in injected into the ducts for approximately 1 hour
  • Small aerosol particles are kept suspended in the airflow by continuous air movement
  • As the air stream makes a sharp turn to exit through a leak, the particles collide with and adhere to the leak edges
  • Ducts are sealed with only 1-2 oz. of the sealant material remaining in the ducts
  • A computer-generated analysis summarizing your home’s or building’s amount of leakage is generated, providing verification of success of the process

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Energy Savings

Does your home or building experience?

  • High Energy Bills?
  • Constantly Running System?

Over 90% of existing buildings located throughout North America have air duct systems that contain small holes and cracks that reduce the level of comfort and increase heating and cooling costs.

Leaks are caused by a variety of factors including the age of the dwelling, type of construction, type of ductwork and local building codes.

Repairing and patching leaks in HVAC duct systems saves cooling, heating, and fan energy. In air-based systems, ducts deliver all of the heating and cooling to conditioned spaces. Any duct leakage translates into extra air that must be supplied so sufficient heating or cooling reaches the conditioned space. This not only increases effective heating and cooling loads, it also increases fan energy due to increased flow and/or run time. Sealing duct leaks reduces the amount of heated or cooled air the supply fan must handle to deliver the same amount of air to the conditioned space.

Frequently Asked Questions

  • What size of holes can be sealed using the Aeroseal air duct sealing process?

  • What does the Air Duct Diagnostic and Inspection tell me?

  • What are the estimated savings?

  • In a nutshell, how does an Aeroseal air duct seal work?

  • Does the air duct sealing material become brittle?

  • How long will the air duct sealing material last?

  • Do air ducts need to be cleaned before air duct sealing?

  • Does the sealant coat the inside of the ductwork?

  • Is the sealing material used by the Aeroseal air duct sealing system safe?

  • Does the sealant leave an odor?

  • If the rooms of my home have inconsistent temperatures, can Aeroseal improve the performance of my heating and A/C system(s)?

  • Can the Aeroseal air duct sealing system help reduce my utility bills?

  • Can the Aeroseal air duct sealing system reduce the noise made by the return and supply grilles in my home?

  • Can the Aeroseal air duct sealing system reduce the amount of dust in my home?

  • Is the sealing guaranteed or can I get my money back? What if it doesn't work?