3M 05520 – Rubber Sanding Block (8 in)

The 3M 05520 Rubber Sanding Block (8 in) is a flexible rubber-backed manual sanding block for wet and dry sanding on automotive paint, clearcoat, and primer. Flexible rubber core conforms to curved body panels and contours while providing enough rigidity to keep the abrasive flat on straight sections — the correct balance for sanding curved automotive body panels without leaving flat spots or skipping low areas.

• Size: 8 in
• Material: Flexible Rubber
• Use: Wet or dry
• Application: Curved panel sanding, clearcoat wet sanding, contoured surface finishing
• Country of Origin: USA
• Part Number: 05520

Consistent hand pressure on a quality sanding block — rather than bare-hand sanding — is what separates flat, level repairs from wavy ones that read in reflective light. The block transfers pressure evenly across the abrasive face, preventing the 'thumb print' high spots and low areas that finger sanding creates. Use on every manual sanding operation from P80 body filler blocking through P400 sealer finishing for consistently flat, professional results.