Standox VOC System Filler U7540 offers high-performance and it very economical. It is chromate-free and ideal for universal use. It can easily be applied on almost any substrate, from factory primed substrates to sanded Standox polyester substrates. Standox VOC System Filler U7540 demonstrates extreme vertical stability, dries quickly, provides good build-up and cures very well. Even at high film thicknesses, the surface remains free of blisters. Its good filling properties ensure the surface is easy to sand, wet or dry, and provide excellent topcoat holdout, which helps to save time and money. It can be overcoated with high solid topcoats and conventional or waterborne basecoats. - Easy to sand. - Good filling properties. - Good insulating properties. - VOC compliant. - Optimal topcoat holdout. - Extremely high filling power thanks to the high solids content (70% when ready to use). - Various hardening options: 4:1 with Standox HS Hardener or 7:1 with Standox VOC Hardener.