Cromax High Productive Surfacer Black - VS7 VS7 - 3.5 litHigh Productive Surfacer White (1051R) and High Productive Surfacer Black (1057R) are highly productive surfacers that can be used as sanding surfacers and as maxi fillers for all Cromax topcoats. They provide a good performance with no edge mapping. By adding High Productive Accelerator AZ1050, the surfacers help to deliver increased productivity through air drying.