3M 7100031595 400 Grit Silicon Carbide Sanding Sheet

Product Description

The 3M 7100031595 is a 400-grit silicon carbide sanding sheet designed for super fine finishing work on a wide range of surfaces. Built on a C-weight paper backing, it delivers consistent cut and flexibility for both wet and dry sanding applications. Silicon carbide abrasive is harder and sharper than aluminum oxide, making it well suited for finishing harder materials, paint, lacquer, and metal. This sheet is part of the 3M 431Q series, a line recognized by finishing trades for its reliable abrasive performance at fine grit ranges. Each sheet weighs 0.01 pounds and is sold individually.

This sanding sheet is used in finishing and surface preparation applications across automotive refinishing, metal fabrication, woodworking, and general industrial work. It performs in both wet and dry sanding scenarios, making it adaptable to hand-sanding blocks or finishing stages on a variety of substrates. The super fine 400-grit rating makes it appropriate for final prep passes before coating, sealing, or polishing. It is commonly used by auto body technicians, metal finishers, and woodworking professionals.

Key Features

• 400-grit super fine silicon carbide abrasive for controlled material removal at finishing stages
• C-weight paper backing balances flexibility and durability for hand and block sanding
• Wet and dry compatible for use with water, cutting fluids, or dry
• Part of the 3M 431Q series for consistent abrasive grain distribution
• Waterproof construction supports wet sanding without backing degradation

Compatibility

Designed as an OEM-style replacement sanding sheet for use with standard hand-sanding blocks and finishing applications requiring a super fine 400-grit silicon carbide abrasive on C-weight paper backing.

Installation Notes

Load onto a sanding block or use freehand for contour sanding. For wet sanding, keep the surface and sheet adequately lubricated throughout the pass to maintain cut and prevent loading. Wear appropriate PPE including a dust mask or respirator when dry sanding, in accordance with applicable shop safety standards. Inspect the sheet for tears or uneven wear before each use and replace when abrasive surface is depleted.