Provided is a composition comprising fatty acid bis-amide, inorganic
particulate such as pumice, cellulosic particulate, thermoplastic and
maleic anhydride grafted polyolefin. The combination of an ethylene
bis-amide and a minor amount of pumice produces cellulosic-thermoplastic
composite that has superior extrusion properties over conventional metal
stearate/ethylene bis-stearamide (EBS) compositions such as improved flex
strength and resistance to water absorption.