The use of fireproofing chemicals should be minimized when possible. Spray-on fireproofing can cause indoor air quality problems when chemical components are released into the air as a result of mechanical damage, air erosion, or deterioration of the binder. Also because spray-on materials have large, porous surface areas, they can act as sinks for adsorption and re-emittance of VOCs. If possible, seal the surface of spray-on fireproofing to reduce adsorption of VOCs. Ensure that the sealer: (a) will not change fire characteristics of the original fireproofing material; and (b) is not a high-VOC emitter. Also seal any penetrations of surfaces sprayed with fireproofing material to prevent damage of the material in the vicinity of penetrations.
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