Fire resistant systems, methods and apparatus

A method comprising:

• (a) attaching a fire-resistant panel to a protected material, wherein the fire-resistant panel comprises a passive layer comprising a phyllosilicate material and a back layer comprising an inorganic material, and wherein the protected material comprises an exposed surface, an unexposed surface, and a core;
• and
• (b) impeding, in the presence of fire and via the passive layer and the back layer, heat transfer to the protected material;
• wherein, during the impeding step, the core of the protected material has an average temperature of not greater than 200° C. above its initial temperature when measured in accordance with section 3.5.3.3(b) of MIL-PRF-32161 or section 5.5.4 of MIL-STD-3020.