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Passive Fire Protection with Intumescent Coatings

Originally used in construction, passive fire protection (PFP) or intumescent coatings are rapidly moving into the automotive space. Applying a thin, even layer of a PFP epoxy, polyurethane, or silicone to  the outside of a battery pack protects it from extreme heat.

When a certain temperature is reached, the sprayed layer of intumescent coating expands, insulating the battery. This keeps the thermal event from reaching the passenger compartment of an electric vehicle (EV).

So that intumescent coating provides effective fire protection, the following must happen:

  • Keep the high viscosity material at the correct temperature when being mixed.
  • Dispense it at a continuous flow for reliable application.
  • Monitor closely the mixing ratio.

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