CORROSHIELD CS Coating provides our fasteners with exceptional corrosion resistance applicable to outdoor environments where they are exposed to contamination of natural atmospheres. It has the perfect price point for the best results to suit most needs, our proprietary coating is protected by a high-density organic zinc-based coating layered over with an aluminum alloy topcoat. This aluminum alloy layer provides the screw with Salt and Acid resistance to endure tough outdoor conditions. CS Coating is the go-to anti-corrosion option for most users with the bestselling range for outdoor applications.