Transtar Euro Classic DTM Primer (2.1 VOC) Gray, 1Gallon, Hardener included. 2.1 Low VOC Euro Classic DTM Primer is a 2K primer surfacer that can be applied directly to metal surfaces. It is quick drying and easy to sand wet or dry. It provides corrosion protection along with excellent fill and build properties. This unique primer provides improvements in productivity and reduces cycle times while providing significant labor and material savings.Mixing ratio 4:1, Hardener included in this kit. 7341