Mistron® CB is high-purity, platy, very fine talc which has been surface-treated with a proprietary silane coupling agent for rubber applications. Mistron® CB can be used in either sulfur or peroxide cured formulations to improve modulus and compression set. Mistron® CB combines the microcrystallinity and the engineered particle size of Mistron® Vapor R with the silane coupling agent to maximize modulus and reduce compression set. It also reduces viscosity and nerve, increases extrusion rate and quality, and improves molding flow of un-vulcanized rubber compounds. The platy structure of Mistron® CB significantly enhances barrier properties.