Aeroseal Residential: Frequently Asked Questions

How long does Aeroseal last? Is the sealant used in Aeroseal safe? These are the questions we hear a lot and you’ll find the answers below. If you have any other questions please do not hesitate to give us a call – we’re here to help!

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By sealing your ductwork utilizing the Aeroseal technology you can expect air to be delivered where it is designed to go and not into your not basement, attic, or crawl space.

This reduces hot or cold spots in rooms and between floors.

Ductwork runs through attics, crawlspaces, basements, garages, and walls. Leaking return air ducts pull in dust and other indoor air pollutants and sends them to the central heating and cooling system. From there they are sent to the living areas of your home.

The Aeroseal air duct sealing system can reduce the amount of leakage by as much as 90%, reducing dust and other indoor air pollutants from the conditioned air in your home.

A series of government reports have shown that air duct sealing can lead to up to $850 in energy savings per year.

Some homeowners have saved up to 40% on their energy bill. Naturally, exact savings are difficult to precisely estimate since they depend on a multitude of variables such as your weather, house condition and design, your heating and air conditioning system, system usage – as well as other factors like energy prices.

Inspection discovers any obvious break in the duct work and, as the initial step of the sealing process, the Aeroseal system will establish an exact amount of leakage in the duct system.

Of course, many people already know that a room or two in their house doesn’t get good air circulation because they can feel it. Or, they already know that their energy bill is high because they see it.

The diagnostic measurement, provides a scientifically valid means to understand the performance of your air duct system. Many people are surprised to learn that homes typically leak 30% to 40% or more of their air through air duct leaks.

Aeroseal is guaranteed for 10 years and stress tested for 40 years in residential applications.

There is a very mild odor similar to Elmer’s Glue during the sealing process.

The odor will dissipate completely by the next morning – but usually before.

Sealant used by Aeroseal is non-toxic and has been used in hospitals, surgery centers, and government institutions.

UL approvals for UL 1381 for aerosol based technology – UL 723 for smoke and flame rating of 0 and UL 181 for mold growth.

Primary component is Vinyl Acetate Polymer, used in water based paints, hair spray, and chewing gum.

View the Safety Data Sheet.

It only takes around 2 hours for Aeroseal sealant to dry.

The sealant used by Aeroseal has been tested by an independant lab and found to have extremely low concentration of VOC’s during sealing time.

The primary componont has NO OSHA maximum exposure limit

We prefer that no one is in the house during sealing due to impact on productivity.

If you are pregnant, a senior, infant, or utilizing medical equipment we do encourage you to leave as a simple safety precaution.

Up to a 5/8th inch round hole can be sealed by Aeroseal.

Broken and disconnected ducts – large leaks – need to be fixed prior to sealing with Aeroseal.  If a hidden large leak is uncovered during sealing, the process is stopped and a solution is discussed.

Sealant escaping from the ducts will settle in wall cavities, attics or crawl spaces.  During the process we will filter the air to capture any sealant entering any living areas.

We recommend that any sensitive electronics be covered while Aeroseal is sealing your ductwork.

Aeroseal certified technicians are trained to protect all HVAC systems and accessories prior to sealing.  Some items, such as humidifiers or UV lights, may be removed then reinstalled to prevent damage.  Others may be bagged or covered.

Extremely dirty ducts should be cleaned.  We recommend that the technician assess the condition of ducts prior to beginning to Aeroseal process.

Ducts of all material types can be successfully cleaned after they have been sealed with Aeroseal.

The Aeroseal process does not coat or line the ductwork.  The only sealant remaining in the ducts will be at the spot of the leak that was sealed.

This noise is usually the result of two conditions. One is created when the ductwork is undersized and air is rushing through your air duct system. The other condition is caused when a limited amount of air is allowed to flow through the indoor coil of your heating and cooling system. Once the exact problem has been identified, your contractor can provide the best solution for noise reduction.

Aeroseal can be used to seal sheet metal HVAC duct incased in concrete slabs under the right conditions.  The duct interior surfaces cannot be wet or hold standing water as the seals will soften and degrade over time if submerged or in contact with water.  The ducts need to be relatively clean with <1/8” of debris buildup on the interior surfaces.

Note Aeroseal is not an encapsulant and is not intended for use as an encapsulant or as a water barrier.  It is also not intended as a repair for failing in-slab ductwork

Find Your Local Aeroseal Dealer Now

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Comments (55)

  • Leo Kessler Reply

    Do you scope (visually inspect) the interior of the duct work (both sides) before completing the process to determine if there are “broken” joints? If not how is this type of problem detected?

    Can you perform the pre test to determine what the potential leakage is, estimate a potential improvement and then get a go no go decision on proceeding? Another words, charge an up front evaluation charge and then determine if the next step – the sealing – will result in a substantial improvement which will substantiate the cost of proceeding with the full seal?

    August 1, 2016 at 11:13 am
    • Andrew at Aeroseal Reply

      Thanks for the question, Leo!

      Typically, Aeroseal Dealers will perform a visual inspection of the duct work prior to beginning the Aeroseal Duct Sealing process. The Aeroseal process actually starts with a pretest of the duct work to measure existing duct leakage.

      You can learn more about the Aeroseal Process (including the pretest) here:

      If you have specific questions about this I recommend that you find your local Aeroseal Dealer using our Dealer Locator here:

      August 12, 2016 at 11:29 am
  • Lonie Reply

    Can I get an estimated cost before I start this process? I am a single income family and need to budget for this expense.

    August 19, 2016 at 12:41 pm
    • Andrew at Aeroseal Reply

      Hi Lonie,

      Thanks for your question!

      The best way to get an estimated cost is by contacting your local Aeroseal dealer.

      You can find the closest Aeroseal Dealer near you here:

      August 22, 2016 at 9:29 am
  • Amy Lavine Reply

    Is this product safe? Seriously

    August 22, 2016 at 3:41 pm
    • Andrew at Aeroseal Reply

      Hi Amy,

      Aeroseal is absolutely safe – The dried sealant material is primarily vinyl acetate polymer (VAP) which has been used in chewing gums, latex paints and hair sprays.

      August 22, 2016 at 3:46 pm
  • Will Claypool Reply

    How does it work in areas where wood (flooring ect) was used as part of the return system?

    August 22, 2016 at 8:37 pm
    • Andrew at Aeroseal Reply

      Hi Will,

      Thanks for your question! Aeroseal will work on this type of set up, the only caveat is we can seal a leak up to 5/8ths inch. If there are larger leaks in the system then that will need to be repaired prior to running the Aeroseal process.

      August 23, 2016 at 7:53 am
  • Tim O'Connell Reply

    Can Aeroseal be used in ducts that are run through cement on grade? I am being told no, because for it to work, it needs air to move through the hole/leak, but with cement it is pushing up against dirt, and so can not properly seal.

    August 29, 2016 at 12:20 pm
    • Andrew at Aeroseal Reply

      Tim, thanks for your question!

      In order for the Aeroseal process to work properly there needs to be a pressure differential across the duct leak or the seal will not form.

      August 30, 2016 at 7:54 am
  • David Reply

    Once the Aerosol dries in ducts, will running hot or warm air through ducts revive any odor and/vapor from the Vinyl Acetate Polymer? In other words, can it go back to its vapor state when exposed to warm or even refrigerated temperatures?

    September 10, 2016 at 9:30 pm
    • Andrew at Aeroseal Reply

      Thanks for the question, David!

      The sealant state as introduced into the system is not a vapor, it is an aerosol. Once the sealant has polymerized from the process, is deposited in the duct system and has had about 2 hrs or so to cure out (volatilize), it will not re-aerosolize. Variances in air handling temperature or humidity levels will not change this.

      The sealant used in a residential application is measured in fluid ounces, and a “typical” home may require between 6 -15 ounces of liquid sealant. This, of course, will vary with system size, initial leakage level, the skill of the applicator, and the amount of leakage eliminated by the process.

      September 14, 2016 at 12:46 pm
  • Diane Reply

    I have exposed ductwork (a design element) in my 1500 sq ft condo. Can Aeroseal be used in this application or will it “leak” through any openings in the duct work and potentially onto my floor or furniture?

    September 15, 2016 at 3:26 pm
    • Andrew at Aeroseal Reply

      Hi Diane,

      Aeroseal fixes leaks in systems like you describe all of the time. Certified Aeroseal technicians have numerous ways to handle any “over spray” issues in a home. There are scrubber fans that can be used, or the system can be adjusted during the sealing process to reduce any extra sealant from leaking into your living spaces!

      September 26, 2016 at 8:27 am
  • Andy Reply

    I have a remodeled home with a 2nd furnace in a 2nd floor closet, and insulated ductwork run through the attic space. The ductwork is a combination of rigid sheet metal and flexible round duct. Can aeroseal be used in this application?

    September 23, 2016 at 2:09 pm
    • Andrew at Aeroseal Reply

      Hi Andy, thanks for your question!

      Based on the information you provided, Aeroseal can absolutely help seal leaks in that type of system.

      September 26, 2016 at 8:27 am
  • David Reply

    Please tell us whether one treatment is usually sufficient for the life-time of a ducting system or whether aeroseal treatment needs to be done more than one time. Thanks.

    October 3, 2016 at 6:43 pm
    • Andrew at Aeroseal Reply

      Great Question David!

      Aeroseal is guaranteed for 10 years – However, it has been stress tested for 40+ years with no issue in residential applications.

      If you would like to know more about Aeroseal I recommend you check out our frequently asked questions.

      October 5, 2016 at 4:31 pm
  • Christine Reply

    Hi can it be done to seal out water that finds its way into floor ducts in a slab foundation? I have this problem when we have heavy rain.

    October 12, 2016 at 1:30 pm
    • Andrew at Aeroseal Reply

      Hi Christine, thanks for the question!

      Aeroseal is designed to seal air leaks – not water leaks.

      October 24, 2016 at 9:58 am
    • Obi Reply

      Christine, I have a similar problem: water intrusion into under slab duct. Have you found a satisfactory solution to this problem?

      March 7, 2017 at 10:25 pm
  • Tarah Reply

    Can Aeroseal be used in ductwork for a gas furnace?

    December 20, 2016 at 12:00 am
    • Andrew at Aeroseal Reply

      Good Question Tarah,

      Yes – Aeroseal can be used in ductwork for a gas furnace.

      January 3, 2017 at 11:58 am
  • Matt Reply

    Do you seal both supply and return ducts?

    February 2, 2017 at 11:33 am
    • Andrew at Aeroseal Reply

      Sure do! Aeroseal is regularly used to seal leaks in supply and return ducts.

      February 2, 2017 at 11:40 am
  • James Ranelli Reply

    What is the typical cost for the aeroseal process for a residential house of 3500 square feet? I am having dust in one side of the house and wanted to know if this process will help.

    February 26, 2017 at 4:13 pm
    • Andrew at Aeroseal Reply

      Hi James, Aeroseal cost varies by application. Your best bet is to contact your nearest Aeroseal dealer for a quote. You can find your nearest Aeroseal dealer here:

      August 11, 2017 at 2:28 pm
  • David Reply

    How much can you save with duct sealing by Aeroseal in supermarkets, hospitals and supermarkets?

    April 6, 2017 at 11:04 pm
    • Andrew at Aeroseal Reply

      Hi David, potential utility savings is hard to determine outside of a case by case basis. It depends on climate, leakage amounts, the system itself, and many other things.

      August 11, 2017 at 2:27 pm
  • D. V. Reply

    I have 2 questions. 1. Is aeroseal residue unsafe for pets to inhale and walk on and lick off their paws?
    2. Is aeroseal residue harmful to fabrics?

    May 11, 2017 at 11:46 pm
    • Andrew at Aeroseal Reply

      Good Question! Aeroseal residue is non-toxic and is safe. Typically when a home is Aerosealed and overspray occurs the Aeroseal dealer will use a scrubber fan to pull any fog out of the air and into a filter. It is not harmful to fabrics as it has the similar ingredients to baby pacifiers or chewing gum.

      August 11, 2017 at 2:26 pm
  • Scot Reply

    Our house is 2.5 years old. Is it worth getting this type of assessment and treatment completed or is it targeted towards older systems.

    May 24, 2017 at 9:52 am
    • Andrew at Aeroseal Reply

      Hi Scot – Good question. Even in a brand new system there is usually duct leakage that can affect the performance of the system and the comfort of your home. It may be worth your time to contact your local Aeroseal dealer for a duct leakage assessment. That way you can know for sure!

      August 11, 2017 at 2:25 pm
  • John Reply

    Can Aeroseal be used on ductwork with duct lining?

    June 20, 2017 at 7:59 am
  • Chris Reply

    Does the cost vary from dealer to dealer? I have 2 dealers within 10 miles from my home and am wondering whether I need both of them to give me estimates.

    July 12, 2017 at 12:07 am
    • Andrew at Aeroseal Reply

      Hi Chris – That is correct! Pricing is determined by the individual Aeroseal dealer.

      August 11, 2017 at 2:15 pm
  • jay Reply

    what is the average cost for the system to do duct work in a home around 1100 square feet

    July 23, 2017 at 10:27 am
  • Jason Roberts Reply

    Can the product be used on flex duct?

    August 11, 2017 at 2:07 pm
    • Andrew at Aeroseal Reply

      Hi Jason – Aeroseal can be used on flex duct.

      August 11, 2017 at 2:13 pm
  • Marilyn Reply

    I have Easy Breeze install in basement will this be a problem?

    December 10, 2017 at 12:17 pm
    • Jonathan at Aeroseal Reply

      Hi Marilyn, thanks for your question! EZ Breathe ventilation basement system is designed to de-humidify basements and exchange air to the outside. Aeroseal should have no impact on this technology. Feel free to call our main office at 877-349-3828 (or email Our team is happy to chat with you!

      December 29, 2017 at 9:20 am
  • Ben Edelman Reply

    How large are the holes you place in the supply and return ducts to inject the sealant? How are they closed and sealed at the end of the procedure? What are the details of the 10 year guarantee? How do you determine whether the original sealing has not lived up to expectations. Is it based on a certain amount of increased leakage over time? Does the guarantee cover the full cost of resealing? Thank you.

    December 26, 2017 at 8:57 pm
    • Jonathan at Aeroseal Reply

      Hi Ben, thanks for your questions! Local technicians will use 14″, 12″ or 10″ standard injection ports. Alternative options are available, if required. Usually re-sealed with material based on duct type. Also following up to your questions about the 10-year guarantee, Aeroseal warrants the product to dealer. Dealer may (not required to) warrant the product to consumer. If applied to technical specifications, warranty covers all direct costs associated with additional application (labor/materials), does not include overhead/travel, etc… Dealer/consumer determine if original sealing objectives are not achieved as long it is not attributed to alterations/remodels/etc. Additional warranty information and process available to new dealers. Feel free to call our main office at 877-718-6985 (or email Our team is happy to chat with you!

      December 29, 2017 at 9:30 am
  • Mukesh Reply

    Is it possible to Aeroseal a home where the basement is furnished?

    July 12, 2018 at 3:56 pm
    • Andrew at Aeroseal Reply

      Hi Mukesh – you can absolutely have your ducts sealed with Aeroseal in a furnished basement.

      August 7, 2018 at 9:02 am
  • Tammy Reply

    There was a leak during the process of sealing our duckwork in the home. Can the porous materials and wooden flooring painted walls etc. be cleaned or will we have to dispose of everything? Also, I noticed on the bottle of Aeroseal that your company supplies three different types of cleaners? How can I purchase those and can I find out which ones work best for which types of materials? Is there a cleaning protocol for each cleaning product? If so, can I obtain that information before I make my purchase? Thank you for your time.

    July 25, 2018 at 3:07 pm
    • Andrew at Aeroseal Reply

      Hi Tammy, any residue can be cleaned with regular dish soap and warm water.

      August 7, 2018 at 9:01 am
  • Lynn Reply

    We have an older home, and getting to the air ducts would be very difficult without destroying walls. Does this process involve disrupting walls?

    August 7, 2018 at 8:46 am
    • Andrew at Aeroseal Reply

      Hi Lynn! Sealing up leaky ducts with Aeroseal does not require destroying walls. The Aeroseal system seals up air duct leaks from the inside – no demolition necessary!

      August 7, 2018 at 8:57 am
  • kathryn Reply

    If a supply vent is located in a clothes closet – yet – plugged with foam by the HVAC contractor during the application, is it advised to clear the entire closet of clothing? Could a leak occur that damages the clothes in the closet?

    August 10, 2018 at 1:19 pm
    • Jonathan at Aeroseal Reply

      Good question, Kathryn! If the temporary foam plug that was placed in the vent somehow moves/shifts, bows under pressure, or dislodges and loses its air tight seal during the Aeroseal process, sealant will blow into the closet. I would err on the side of being cautious and remove or at least cover clothes and other valuables with thin clear plastic painters’ throws.

      August 21, 2018 at 7:19 am
  • George Papanikolaou Reply

    I have fixed wood registers in the floor that can’t be removed. Can you still seal the system?

    August 20, 2018 at 9:17 pm
    • Jonathan at Aeroseal Reply

      Yes, you can still seal the system. Since the registers cannot be removed, licensed Aeroseal dealers are trained to handle blocking these types of registers as well as typical removable registers.

      August 27, 2018 at 8:01 am

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