Spray Foam FAQs

How long has spray foam insulation been around?
Spray polyurethane foam insulation has been around for more than 30 years. Its primary use was in the food storage industry. Spray foam insulation has been perfected over the last 10 years and no longer contains urea formaldehyde and does not use CFCs as blowing agents.
What is the R-Value of SealRite Spray Foam™ per inch?
SealRite Spray Foam™ insulation ranges in R-Value from 3.8 – 7 per inch. This range of values relates to the type of spray foam chosen – open cell or closed cell foam. For a full listing of R-values, please refer to the product specifications sheets posted here.
What is the difference between open-cell and closed-cell foams?
Both open and closed cell foams stop the movement of air and slow down the transfer of heat. Closed cell foams have low vapor permeance due to their cell structure. These foams, depending on thickness, may be considered a vapor retarder but not a vapor barrier. Closed-cell foams also have a high compressive strength which allows them to be used for exterior applications.

Open-cell foam should never be used for exterior applications. Open-cell foams are more cost effective per unit of R-value than closed-cell foams but do not provide the structural contribution to a building that closed-cell foams do.

Please work with your dedicated spray foam specialist to determine which product works best for your specific application.
Will SealRite Spray Foam™ burn?
All SealRite Spray Foam’s™ are Class 1 fire rated. They will char but will not sustain a flame.
Does SealRite Spray Foam™ support bacteria or fungal growth?
No, SealRite Spray Foam™ products are inert substances that do not support growth, including, but not limited to mold and mildew.
Does SealRite Spray Foam™ contain formaldehyde?
Since some types of SealRite Spray Foams™ are soy-based, do rodents and insects eat the insulation?
No. SealRite Spray Foam™ is an inert substance and provides no food value for rodents and insects.


What makes SealRite Spray Foam™ so effective?
SealRite Spray Foam™ is so effective because it is applied as a liquid and expands multiple times its original liquid size in seconds. As it expands, it conforms and fills cavities, crevasses and voids to create a sealed thermal envelope. SealRite Spray Foam™ creates a highly efficient seal against air infiltration, the number one source of energy loss in a structure. This innovative insulation adheres to any clean, dry surface and will not sag, settle or disintegrate. SealRite Spray Foam™ also is an inert substance and will not promote mold growth, insects or rodents. It does not break down over time, so it creates a sealed interior that blocks harmful outside irritants.
How does SealRite Spray Foam™ save you money?
While the initial cost of installing SealRite Spray Foam™ may be higher than traditional insulation, the savings in monthly utility bills outweighs the extra cost and results in a positive cash flow. As an example, using SealRite Spray Foam™ may increase your monthly mortgage by $15, but decrease your monthly utility bills by $65, providing a net savings of $50 each month.

For commercial applications, savings can be seen in similar ways; namely, in the added comfort and decrease in monthly utility bills by 30-50%.

Because SealRite Spray Foam™ creates a continuous, sealed thermal envelope around your home or structure, in many cases, you also can save additional money by reducing the required size of the HVAC (heating and air conditioning) unit.
How does SealRite Spray Foam™ control indoor air quality and comfort?
SealRite Spray Foam™ provides a healthier, draft-free, indoor environment. Because SealRite Spray Foam™ expands to fill cavities, crevices and voids, it provides a sealed thermal envelope that does not sag or settle over time. This helps to maintain good indoor air quality by blocking harmful outside irritants such as mold, pollen and other allergens and offers an alternative to fibrous particulates which are attributed to many traditional insulation products.

This sealed envelope gives the HVAC system full control over the amount of filtration of fresh air coming into the structure in addition to reducing drafts and temperature differences throughout the building. A sealed envelope significantly improves sound attenuation.
How does SealRite Spray Foam™ control moisture movement and condensation?
A significant cause of moisture issues in structures is the result of warm, moist air being exchanged with cold, dry air inside a wall cavity. This moisture can condense within the cavity and result in mold, mildew and rot. Because SealRite Spray Foam™ provides an air seal and moisture barrier, condensation potential is greatly minimized.
How long does SealRite Spray Foam™ last?
Indefinitely. As an inert, thermoset plastic, SealRite Spray Foam™ will maintain its properties throughout the life of the building.


How long does it take for SealRite Spray Foam™ to cure?
Open-cell SealRite Spray Foam™ cures in seconds as it expands to 100 times its liquid volume. Closed-cell SealRite Spray Foam™ cures in approximately 2 minutes and expands to 30 times its liquid volume.

Does SealRite Spray Foam™ adhere to metal or wood studs?
SealRite Spray Foam™ adheres well to almost any material, especially wood and steel studs, which are commonly found in residential and commercial construction.

Can SealRite Spray Foam™ be sprayed over electrical wiring?
SealRite Spray Foam™ does not pose any issues with electrical wiring as long as the electrical wiring is installed per National Electric Code. Any overheating issues with SealRite Spray Foam™ in regards to wiring would be directly related to improper installation of the circuit or the size of the wiring.

What happens if I need to add an electrical outlet once SealRite Spray Foam™ is installed?
A certified electrical contractor can pull wire through SealRite Spray Foam™.

Are there any compatibility concerns with other building materials?
SealRite Spray Foam™ is stable in the presence of most solvents found in binders, bituminous materials, wood preservatives and sealers. It is resistant to facers containing plasticizers, fuel, mineral oil, weak acid and weak bases, which are typically found in residential and commercial construction materials.

How is SealRite Spray Foam™ installed?
SealRite Spray Foam™ is sprayed onto the substrate by a certified spray foam engineer. It then expands many times its initial volume in seconds, adhering to the surfaces of the surrounding building materials and sealing all gaps. Required spray foam equipment elements include a plural component proportioner pump with heaters, dual high pressure heated hoses, high pressure mixing spray gun, feed pumps, an air compressor, and an electrical generator.

Can I install SealRite Spray Foam™ myself?
No, only trained professionals can install SealRite Spray Foam™ because of the sophisticated equipment needed to install it properly. SealRite Spray Foam™ trains and certifies its application engineers to ensure that products are properly and safely installed.

How much does it cost to install?
The best way to find out is to contact us and let one of our Innovative Insulation Specialists provide a custom tailored quote according to your needs and specifications. As a rule of thumb, spray foam insulation generally costs 2-3 times more than traditional insulation.

SealRite Spray Foam™ and LEED

What is LEED?
The LEED (Leadership in Energy and Environmental Design) Green Building Rating System® is a voluntary, consensus-based national standard for developing high-performance, sustainable buildings. Members of the U.S. Green Building Council representing all segments of the building industry developed LEED and continue to contribute to its evolution. SealRite Spray Foam™ has been used by builders in the past to assist in qualifying for up to 16 LEED credits.

Some of our LEED projects include Homes for Our Troops (Certified Platinum) in Hillsdale, NJ and a new residence (Certified Silver) in Long Beach Island, NJ.