AKPEROX HC9 with cobalt accelerator (AKCOBALT 10%) is used for curing unsaturated polyester resins at 60˚C or higher. The main applications are artificial marble, polymer concrete, filament winding and air drying paints. AKPEROX HC9 in combination with cobalt accelerators and possibly amine accelerators (e.g. N,N Dimethylaniline) is also suitable for curing vinyl ester resins at room temperature. AKPEROX HC9 cures much faster in these resins than commonly used peroxides.