Spray polyurethane foam (SPF)


Health Concerns
Spray polyurethane foam (SPF) is a highly-effective and widely used insulation and air sealant material. However, exposures to its key ingredient, isocyanates, and other SPF chemicals in vapors, aerosols, and dust during and after installation can cause asthma, sensitization, lung damage, other respiratory and breathing problems, and skin and eye irritation.

Health Concerns Associated with Side A: Isocyanates

Health Concerns Associated with Side B: Polyol Blend

Isocyanates – reported attributable chemical – cause of work-related asthma (potentially life-threatening disease)


Health Concerns Associated with Side A: Isocyanates
Isocyanates are a class of highly reactive chemicals with widespread industrial, commercial, and retail or consumer applications.

Exposure to isocyanates may cause skin, eye and lung irritation, asthma, and “sensitization.” Isocyanates have been reported to be the leading attributable chemical cause of work-related asthma. Both dermal and respiratory exposures can trigger adverse health responses.

EPA, other federal agencies, states, industry, and other countries have taken a variety of actions to address risks posed by exposure to isocyanates.

Exposures to isocyanates should be minimized. The following were noted in the NIOSH Alert, Preventing Asthma and Death from MDI Exposure during Truck Bed Liner and Related Applications.

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Isocyanates have been reported to be the leading attributable chemical cause of work-related asthma, a potentially life-threatening disease.
Exposure to isocyanates can cause contact dermatitis, skin and respiratory tract irritation, sensitization, and asthma.
Both skin and inhalation exposures can lead to respiratory responses.
Isocyanates can cause “sensitization,” which means that some people may become allergic to isocyanates and could experience allergic reactions including: itching and watery eyes, skin rashes, asthma, and other breathing difficulties. Symptoms may also be delayed up to several hours after exposure. If you are allergic or become sensitized, even low concentrations of isocyanates can trigger a severe asthma attack or other lung effects, or a potentially fatal reaction.
Some workers who become sensitized to isocyanates are subject to severe asthma attacks if they are exposed again. Death from severe asthma in some sensitized persons has been reported. NIOSH issued an earlier Alert in 1996, “Preventing Asthma and Death from Diisocyanate Exposure.”
Sensitization may result from either a single exposure to a relatively high concentration or repeated exposures to lower concentrations over time; this is an area where additional research is needed.
Even if you do not become sensitized to isocyanates, they may still irritate your skin and lungs, and many years of exposure can lead to permanent lung damage and respiratory problems.
All skin contact should be avoided since contact with skin may lead to respiratory sensitization or cause other allergic reactions. Appropriate personal protective equipment (PPE) should be used during all activities that may present exposure to any isocyanate compounds to avoid sensitization.


Health Concerns Associated with Side B: Polyol Blend
Side B contains a blend of proprietary chemicals that provide unique properties in the foam, and may vary widely from manufacturer to manufacturer.

Catalysts may be amine or metal catalysts
Amine catalysts in SPF may be sensitizers and irritants that can cause blurry vision (halo effect)
Flame retardants, such as halogenated compounds, may be persistent, bioaccumulative, and/or toxic chemicals (PBTs). Some examples include:
TCPP -(Tris(2-chloroisopropyl)phosphate)
TEP -(Triethyl phosphate)
TDCP -(Tris (1,3-dichloroisopropyl) phosphate blend)
Blowing agents may have adverse health effects
Foam blowing agents
Some surfactants may be linked to endocrine disruption

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Spray polyurethane foam (SPF)

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