How to choose sandpaper discs of different materials？

Sandpaper discs can be categorized into the following types based on the abrasive and backing:
1. Abrasive Material

Silicon Carbide (SiC)
High hardness, suitable for sanding hard materials such as metal and glass, commonly found in the low- to medium-grit range of 60#-1500#.

Brown Corundum (Aluminum Oxide)
Excellent toughness, suitable for rough sanding wood, plastic, and metal surfaces, mostly used in the 80#-240# rough sanding stage.

Diamond
High-end models (e.g., 5000# and above) are used for mirror polishing jade and jewelry and require a soft backing.

2. Backing Material

Paper Backing
Standard backing, primarily for dry sanding, is economical and practical. Some brands offer a waterproofing treatment.

Flocked Backing
Abrasive is secured using an electrostatic grit-graining process, preventing clogging and resisting wear, making it suitable for high-intensity work such as automotive paint jobs.

Sponge Backing

Soft and conformable to curved surfaces, compatible with wet sanding, primarily used for electric sanding accessories or precision polishing.

Non-Woven Backing

Lightweight design, fast heat dissipation, suitable for extended mechanical sanding.

3. Adhesive Technology

Adhesive Backing: Double-sided adhesive directly adheres to sanding tools for easy replacement.

Fleece Backing: Adhesive backing is bonded to the sanding tool through the fleece, suitable for rotary sanders. Available with or without holes for heat dissipation and chip removal.

4. Special Material Combinations

Aluminum Oxide + Pick: High-strength backing, tear-resistant, suitable for industrial-grade continuous sanding.

Silicon Carbide Waterproof Paper: Our company (https://www.sxsycoated-abrasives.com/sandpaper/waterproof-sandpaper/400-grit-wet-dry-sanding-sheets.html) produced this silicon carbide latex waterproof sandpaper utilizes a novel process, combining flexibility and water resistance.