Com. epoxy resin was filled with bentonite, a mixt. of SiC and WC powders and glass fabrics to produce thermoprotective composites. The composites were treated with hot combustion gases to det. the temp. profiles across the studied samples (cubes 10 x 25 x 35 mm). Carbonization of the epoxy matrix was obsd. The glass fabrics-filled composites showed the best insulating properties.