Sherwin-Williams Automotive Finishes Genesis 2.1 VOC gray epoxy primer, No. E2A400, is U.S. compliant at 2.1 lbs/gal VOC, offers ready-to-spray solids of 48 percent and applies similarly to a sealer. E2A400 is easily topcoatable, and it can be used with a wide range of topcoats. E2A400 has fast dry times and good sandability, according to the company. Along with wet-on-wet capabilities with various compatible topcoat systems, E2A400 DTM Primer also has the option to be accelerated.