Abstract: A method for recycling rubber scrap to yield a final product of various thicknesses and various widths and lengths capable of consolidation into a variety of building product materials. Particle boards including scrap rubber, with or without synthetic and/or textile fibers composition, of the present invention are characterized by high strength, fire resistance, water and rot resistance, and display favorable thermal and acoustical insulation qualities. Adhesives, strengtheners, and fire retardants are mixed with rubber scrap, with or without synthetic or textile fibers, and introduced into molds; or an apparatus system for the continuous production of scrap rubber products; where heat, pressure, with or without ultrasonic sound, is introduced to produce the final product. The amount of chemicals and/or other components to be added to the composite mixture will vary according to the desired result in each of the specified categories characterized by strength and fire resistance.