SYNTEVEN 461 is a medium flexible, medium reactive styrenic unsaturated polyester resin free from amine accelerators. It is particularly suitable in combination with unsaturated polyesters of the “direct gloss” type for the preparation of highly pigmented undercoats and primers and specifically spray fillers. SYNTEVEN 461 is used as a flexibilizer in the formulation of fillers for Car Refinishing. It can be used as a cutting resin for regulating the reactivity and elasticity of fillers and mastics based on SYNTEVEN of the 400 series.