A 0.5mm sheet of cardboard was chosen as a test piece and covered with three layers of the RE-FLAME™ coating. The thickness of each layer was 0.5mm. The total layer thickness was equal to 1.5 mm.
A gas air-blast burner was used to simulate the fire. The burner was directed at the painted side of the cardboard sheet. The combustion temperature of propane-butane with the forced air draft is +1600 ºС.
As soon as the RE-FLAME™ coating temperature reached over 200 ºC, the formation of a hard burning foam started. The purpose of this foam is precisely to prevent or reduce heating of the application surface.

1 minute of exposure

5 minute of exposure


In the process of the thermal fire exposure aimed at the RE-FLAME™ coating, we also carried out thermography on both sides of a cardboard sheet with the identification of surface temperatures (the temperature of the exposed surface and the one on the reverse side).
The temperature of the thermally exposed side is outside the measuring range of the thermal imaging camera, i.e. +500 ºC. The surface temperature of the reverse side of a cardboard sheet at the hottest point is + 174 ºC. This temperature is lower than the combustion temperature of wood and paper, as well as lower than the melting point of metal and concrete destruction. Due to the RE-FLAME™ coating, there is no inflammation and charring of the cardboard sheet after the prolonged flame exposure.
The experiment clearly shows the high efficiency of the RE-FLAME™ fire-retardant coating in suppressing flame and high temperatures. When exposed to fire and high temperatures, the RE-FLAME™ swells to form a fire-retardant foam that counteracts further heating of the structure where it was applied. Therefore, the surface covered with the RE-FLAME™ coating is effectively protected from both heat and open fire.