A constituent of glass fiber size (glass fiber fillers for unsaturated polyester resins and polyolefins) A finish for glass fabrics used in unsaturated polyester resins As a surface modifier for pigments and fillers for thermosets (unsaturated polyester, MMA), thermoplastics (polyesters and polyolefins) and elastomers As an additive for filled, peroxide-crosslinked elastomers As an additive for casting resins (unsaturated polyester, MMA)