Abstract: In a particulate additive for water for fire fighting containing a strongly swelling water-insoluble high molecular weight polymer as gelatinizing agent, the improvement which comprises a water-soluble release agent which does not cause the particles of said gelatinizing agent to swell, the particles of the gelatinizing agent being encased or dispersed in the release agent. Suitable release agents include polyethylene glycol, diammonium biphosphate, sugars, mannitol, etc. The gelatinizing agent may be a moderately cross-linked water-insoluble acrylic or methacrylic acid copolymer.

Abstract: A multilayered electronics protection system includes a first ablator layer providing thermal protection that is sprayed on to a non-metallic surface of an electronics enclosure. A second ablator layer comprised of highly conductive material is sprayed on to the first ablator layer and provides protection against strategic environmental threats.

Abstract: A fire protection and/or extinguishing article comprises a sheet which has, uniformly dispersed therein, a material which undergoes an endothermic reaction to release a non-flammable gas and simultaneously absorb heat when subjected to an elevated temperature. This sheet is sandwiched between a gas permeable thermal barrier and a layer of gas permeable thermal insulation in a preferred embodiment which may function as a foldable and storable blanket.