Cimbar Performance Minerals fine grind Polyfill series alumina trihydrate products are used extensively in elastomers, thermoset plastics, thermoplastic and coating applications where optimum physical properties and surface finish qualities are critical. Use of fine grind Polyfill series products increases flame retardancy and smoke suppression. Polyfill/PolyJet alumina trihydrate products are tightly controlled by Cimbar Performance Minerals ISO 9001:2015 quality program.