Flexible Sanding Discs

Flexible Diamond Sanding Discs & Pads – Wet Sanding for Stone, Glass, Ceramic & Curved Lapidary Surfaces

Professional flexible diamond sanding discs and foam-backed polishing pads for wet sanding and polishing of stone, glass, ceramic, granite, marble, and curved lapidary surfaces. The flexible backing conforms to curved and contoured surfaces — delivering consistent scratch removal and surface finishing from coarse sanding through fine pre-polish stages. Available in 8" discs (magnetic, Velcro, and plain backing) and 1.75"×2.75" foam-backed hand pads across grit 80 to 1800.

🔥 Shop Flexible Diamond Sanding Discs – From $6.00

Available Sizes & Pricing

Format Size Grit Range Backing Price
Disc 8" 1800 Magnetic / Velcro / Plain $55.00–$60.00
Foam Hand Pad 1.75"×2.75" 80, 120, 240, 400, 600, 800, 1200, 1500, 1800 Foam-backed $6.00 each

Grit Selection Guide

Grit Stage Application
80–120 Coarse sanding Rapid scratch removal, surface flattening, coarse shaping on stone & glass
240–400 Medium sanding Intermediate scratch removal, surface refinement after coarse stage
600–800 Fine sanding Pre-polish preparation, fine scratch removal on stone & ceramic
1200–1500 Fine pre-polish Near-polish surface quality, minimal scratch depth
1800 Ultra-fine pre-polish Final surface preparation before polishing compound stage

Compatible Applications

  • Stone: granite, marble, quartz, slate, sandstone surface finishing
  • Glass: curved glass surfaces, glass art, stained glass edge finishing
  • Ceramic and porcelain tile surface refinement
  • Curved and contoured lapidary surfaces where rigid discs cannot conform
  • Hand sanding and detail work on irregular stone shapes

Related Tools

Frequently Asked Questions

  • Q: What is the difference between flexible diamond sanding discs and rigid flat lap discs?
    A: Flexible diamond sanding discs have a foam or flexible backing that conforms to curved and contoured surfaces — essential for sanding curved stone shapes, glass art, and irregular lapidary surfaces where rigid discs cannot maintain consistent contact. Rigid flat lap discs are designed for flat surface grinding on flat lap machines where a perfectly flat grinding surface is required for accurate cabochon shaping and faceting.
  • Q: Can flexible diamond sanding pads be used dry?
    A: Wet use with water is strongly recommended for all diamond sanding applications. Water reduces heat buildup, extends pad life, flushes stone and glass particles from the pad surface, and prevents thermal cracking of the workpiece. The 1.75"×2.75" foam-backed hand pads are particularly effective for wet hand sanding on stone and glass surfaces.
  • Q: What grit sequence should I use for polishing a granite countertop edge?
    A: For granite edge polishing, start with 80–120 grit to remove saw marks and rough edges, progress through 240–400 grit for surface refinement, then 600–800 grit for fine sanding, 1200–1500 grit for pre-polish, and finish with 1800 grit before applying cerium oxide or diamond compound on a polishing pad for the final mirror finish.
  • Q: What backing options are available for the 8" flexible sanding disc?
    A: The 8" flexible sanding disc is available with magnetic backing (for magnetic quick-change flat lap machines), Velcro (Hook & Loop) backing (for angle grinders and rotary tools with compatible backing pads), and plain (no backing) for custom mounting. The 1.75"×2.75" foam-backed hand pads are for hand use only.
  • Q: Can the foam-backed hand pads be used on an angle grinder?
    A: No — the 1.75"×2.75" foam-backed hand pads are designed for hand sanding only. For angle grinder use, choose the 8" flexible sanding disc with Velcro backing and a compatible 8" backing pad for your angle grinder. Always use appropriate speed settings and water cooling when using diamond sanding discs on power tools.