The burning characteristics of an inflammable polystyrene rigid foam, coated with LIQUID G+ (a water dispersion of graphene nanoplatelets) are evaluated by the standard method UL94HB. This method allows to determine the flame propagation rate between two benchmarks (two lines which delimitate the extremities of the specimen at 25 and 125 mm along the c axis). The specimen is mounted with its long axis horizontal and its short axis at a 45 degree angle. LIQUID G+ coating renders the highly inflammable polystyrene foam non-flammable.
