I read the technical description in the link. Here is what it said (using Google Translate):

Under the influence of high temperatures, Flame Stal® FireProof Solvent foams, creating a durable thermal insulation, delaying the temperature increase of the steel substrate.

What is the mechanism for the paint to foam? Is it a mixture of components, one of which is a solvent in solid or liquid form, which turns into a gas which causes the paint to change into a foam?  It will be helpful to create the simulation if you know the detailed mechanism of how the material creates a foam at high temperatures.