Embercoat unlike other fire retardants is not an intumescent coating which when exposed to high heat (approx. 200–250°C), they undergo a chemical reaction, swelling to form a thick, insulating char layer that protects the substrate for up to 2 hours. Embercoat instead creates a ceramic like glaze to prevent ignition. This feature not only allows for ease of recoating as the substrate has not been damaged but also does not sacrifice the final coat if damaged due to embers.