SYNTEVEN 674 is an unsaturated polyester resin, modified with DCPD, pre-accelerated with an amine adduct, very reactive and highly stabilized, with high reactivity and low viscosity, which hardens when cold even at temperatures close to 0°C forming medium flexibility polymers and of medium hardness. Fillers formulated with SYNTEVEN 674 harden completely both at high and low thickness, are evident from good flexibility and adhesion and are particularly suitable for the body shop sector, ensuring very short sanding times.