A fire retardant body comprises a polymeric matrix and a non-halogenated fire retardant component that is an intumescent material. The fire retardant component is present in the fire retardant body in an amount from about 55% to about 95% of the body by weight. The body preferably has a thickness of at least about 3 mm in each dimension. Methods of using the fire retardant body for protecting a substrate from fire damage are also provided.