Fontefire WF is a one-component water-borne intumescent coating for wood.
It is not simply fire resistant or fire retardant. Just like its cousin, steel intumescent coating, it actually keeps the substrate cool and therefore hinders the progression of fire. Because it keeps the substrate cooler, it is particularly useful in composite beams, to prevent premature softening of the polymeric adhesive. Validated with ISO and European fire tests, it is currently undergoing ASTM and UL testing for protection of wooden substrates. It has a very low level of organic emissions (VOC value 19g/liter).