Fire Protection

Fire protectionVermiculite is used to impart a high degree of fire protection in many industrial and construction applications. Its low density and impressive insulation properties make it useful in:

  • Building boards
  • Fire door cores
  • Encased ductwork
  • Steel building elements
  • Gypsum plasterboard
  • Cementitious spray
  • And more

If it can’t stand the heat…add vermiculite!

Because vermiculite platelets are inorganic, vermiculite can be used as a high-temperature coating, binder, or filler in construction materials, gaskets, specialty papers, and high-temperature textiles. It can impart fire-resistance and upgrade the service temperature of the end product.

Coatings of vermiculite on fiberglass textiles have been shown to increase the service temperatures up to 1100C. These materials have found use in applications including safety fabrics, safety clothing, and thermal insulation.


MicroLite’s easy application and proprietary binders allow for direct application on fabrics and other industrial materials to provide a fire-rated material. Coatings of Microlite on fiberglass textiles have been shown to increase the service temperatures up to 1100°F. You’ll notice in the video that despite temperatures immediately increasing above 1100°F, the flame did not break through the Microlite coated fiberglass mat. The protection of the Microlite coating is clear as the back thermocouple stays well below 1100°F after 90 seconds of continuous burning. Have you seen clothes and other thermal textiles, like blankets, marketed as fire-resistant? They may be coated with Microlite.