Concept 2K Etch Primer is an acid containing etch and primer in one product. This Product is characterized by excellent adhesion and corrosion protection for a wide range of metal substrates. 2K Etch Primer also includes a rust inhibitor and gives a sound surface for the application of primer surfacers and subsequent topcoats. It is used when high performance corrosion and adhesion quality is required. It is Chromate free.