The A1 wonder foam Substrate: Wood, metals, mineral substrates Max. temperature: 1,100° C viscosity: liquid to paste-like. Adjustable calorific value: Cooling in the event of fire FireFoe (m) is a two-component, non-flammable, self-foaming mineral foam for a wide range of uses, such as the foaming of wall openings, door and window frames, joints and other cavities. The mineral foam can also be used as a heat-insulating and gap-bridging adhesive. After drying, FireFoe (m) has the consistency of pumice stone and, according to testing by the MPA NRW (test No. 230011475-3), has been assigned to building material class A1 (according to DIN EN 13501-1). Patent pending: DE 10 2017 011 280 A1, PCT / EP 2018/084062, registered European trademark.