Denso Contact Primer Sealer (DC300) is a primer made from special acrylic resins. It looks like a clear liquid. that can penetrate into the surface very well Because the molecular size is smaller than the general primer. It has the property to help bind the texture of the surface to adhere firmly. and there is an additional part to help the adhesion of the topcoat to the surface excellently Can prevent the problem of flaking of the topcoat paint. Can also be coated as a primer to prevent salt seepage. and prevents alkaline conditions from the surface as well