This is a UP0765 Aero High #5 Primer Dk Gray. iK High Build Primer, Dark Grey, Aerosol. For the rapid repair of surface defects in painted panels. May be used for small spot repairs or complete coating of new panel. High build, fast drying, easy sanding, chromate free. Can be applied to the following surfaces. Fully cured paint. Polyester body fillers & FRP. High build & fast drying.