MT Waterproof Sandpaper S400 is a premium-grade sanding paper designed for ultra-fine sanding and finishing. Made with high-quality abrasive grains, it delivers smooth, consistent performance and excellent durability, making it ideal for use on wood, metal, paint, and other surfaces. The S400 grit provides an ultra-smooth sanding finish, perfect for final surface refinement, removing very fine imperfections, and preparing surfaces for polishing or final coatings. Its waterproof design allows for wet sanding, which helps reduce dust, prevent clogging, and achieve a cleaner, smoother result. Suitable for both professional craftsmen and general users, MT Waterproof Sandpaper S400 meets industry standards for reliable performance and consistent results in various fine sanding applications.