Gl P60 Black Silicon Carbide Waterproof Sandpaper. Silicon Carbide Material: High-performance abrasive made from silicon carbide for efficient grinding. Waterproof Design: Water-resistant sandpaper suitable for wet sanding applications. Wide Grit Range: Available in P60 to P3000 grits for various finishing needs. OEM and ODM Services: Full customization options including samples, designs, and flexible customization. Free Sample Offer: Free samples are available for customers to test product quality. 30+ Years Expertise: Over three decades of experience in advanced abrasives R&D and production. ISO Certified Quality: Manufacturing processes certified under ISO 9001 and ISO 14001 standards. Fast Response Support: Engineers provide quick responses within 24 hours for technical issues.