Duct Sealing FAQ

How long does the process take?

Usually around 4 hours per system. This is dependent on the size of the system, access to all vents and ductwork, and leakiness of the ductwork.

How long will it last??

Aeroseal is guaranteed for 10 years in residential applications but has been tested to 40 years.

Is the sealant safe?

The sealant is non-toxic, and EPA approved. The primary component is vinyl acetate polymer, used in water-based paints, hair spray, and chewing gum.

What VOCs are emitted?

The sealant has been tested by an independent lab and found to have an extremely low concentration of VOCs. The primary component has no OSHA maximum exposure limit.

How long does it take to dry?

The drying time is less than 2 hours. However, the AC can be turned on immediately after the sealing process. Will my house smell? There is a mild odor, like Elmer’s Glue, during sealing. The odor should be gone by the next morning.

Should I be in the house?

We prefer no one is in the house during sealing as the temperature of your home will be uncomfortable since the AC must be off. If you are pregnant, a senior, or have an infant, or utilizing medical equipment we do encourage you to not be in the home as a simple safety precaution.

How big of a leak can be sealed?

Up to a 5/8” diameter hole can be sealed during normal range of productivity.

What about leaks that are too big?

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

Where does the sealant leaking from the ducts go?

Sealant escaping from the ducts will settle in wall cavities or attics depending on duct location. During the process we will filter the air to capture sealant escaping into the room.

Will it harm electronics?

Sensitive electronics should be covered simply as a precaution. During the process we will filter the air to capture sealant particles escaping into the room.

What about my HVAC accessories?

Our technicians are trained to protect all 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.

Do ducts need to be cleaned before sealing?

Extremely dirty ducts should be cleaned prior to sealing.

Can I clean my ducts if they are sealed?

Ducts of all material types can be successfully cleaned after sealing.

Will the ducts be covered with sealant?

The Aeroseal process does not coat or line the ductwork. The only sealant remain in the ducts will be at the previous leak.