3M Company 99405NA 80 Grit Aluminum Oxide Sandpaper 25 Count

Product Description

The 3M COMPANY 99405NA is an aluminum oxide sandpaper sheet designed for heavy-duty material removal on paint, wood, and metal surfaces. Each sheet measures 9 inches x 11 inches and carries an 80-grit rating, making it well suited for aggressive stock removal and surface leveling. The backing is a heavy-duty D-weight paper construction, which provides the rigidity and tear resistance needed for demanding hand-sanding and block-sanding applications. Sold in a 25-sheet box, this product is a straightforward consumable for contractors, woodworkers, auto body technicians, and maintenance trades who need a reliable abrasive at a working grit.

This sandpaper is appropriate for both residential and light commercial applications. Common uses include stripping paint from wood trim and doors, smoothing rough lumber, removing mill scale or surface rust from metal, and scuffing surfaces before primer or coating application. The 80-grit designation places it in the coarse range, typically used as the first pass in a multi-step sanding sequence before progressing to finer grits. Packages are tri-lingual die-cut for easy identification and dispensing on the job site or in a shop setting.

Key Features

• 80-grit aluminum oxide abrasive for aggressive material removal
• Sheet size of 9 inches x 11 inches fits standard hand sanding blocks and pad sanders
• Heavy-duty D-weight backing resists tearing during extended sanding sessions
• Suitable for use on paint, bare wood, and metal substrates
• 25 sheets per box for consistent job-site supply
• Tri-lingual die-cut packaging for easy access and identification

Compatibility

Designed as an OEM-style replacement consumable abrasive sheet for use with standard 9-inch x 11-inch hand sanding blocks and sheet-pad sanding tools across residential and commercial applications.

Installation Notes

Abrasive sheets are a consumable product installed by hand or loaded onto a compatible sanding block or pad. Ensure the work surface is secure before sanding. When working on painted surfaces that may contain lead-based paint, follow applicable OSHA and EPA renovation, repair, and painting (RRP) guidelines, including appropriate respiratory and eye protection. Discard sheets when abrasive loading or visible wear reduces cutting efficiency.

Technical Specifications

• Grit: 80
• Abrasive Material: Aluminum Oxide
• Sheet Size: 9 inches x 11 inches
• Backing Weight: D-Weight (Heavy Duty)
• Count per Box: 25 sheets
• Package Quantity: 10
• Weight: 23.2 pounds

Standard Information

• Brand: 3M COMPANY
• Manufacturer Part Number: 99405NA