Abstract: A fire resistant material having boards of the same nature on the upper and lower section of a board core that useful in the manufacture of vessels and other high fire risk is provided. The core board may be made of polyurethane foam, polypropylene or a metal, preferably aluminum while the external boards adhered to the core board are made of aleatory nonwoven sheets adhered to a woven fiber sheet. External or outmost surfaces of the material are further cover with a continued and uniform intumescent paint coating.

Abstract: Flame-retarding arrangement for reinforced-plastic boats which may be of two kinds: Either a solid laminate arrangement formed by various layers of reinforced plastic with flame-retarding additives, with a coating of intumescent paint or a sandwich-type laminate arrangement formed by a core material, which is a fireproof, low-weight, compact or meshed material made of metal, wood or structural foam, two films of reinforced plastic with flame-retarding additives, which have a coating of intumescent paint, this being located on the sides of the core, and an adhesive, which bonds the two films to the core.