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SKU 7100078006
Legacy SKU 60440299794
UPC 00051125871808
Product Number 405U

3M™ Paper Sheet 405U is a silicon carbide sheet constructed on an A-weight, light paper backing. It features a load-resistant coating and open coat construction.

  • Fast cutting silicon carbide delivers exceptional finishes
  • Load-resistant coating and open coat construction minimize loading for better finish and longer abrasive life
  • Silicon carbide is ideal for general purpose sanding on wood, metal, plastic, dry wall, fiberglass, glass and ceramic
  • Light A-weight paper backing has excellent conformability
  • Great for contour sanding
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On it's way to you October 10   


Minimum Order 2,000 Sheets
Order Increment 2,000 Sheets
  Immense Durability
  Reduces Abrasive Costs
  Lowest Price Per Item
Product Dimensions
Imperial Metric
Width 5-1/2 in 139.7 mm
Length 9 in 228.6 mm
Shipping Dimensions
Weight 20.538 lb
Length 9.625 in
Width 9.625 in
Height 12.25 in
Grit 500


  1. What is 3M™ Paper Sheet 405U?

    3M™ Paper Sheet 405U is a sandpaper sheet used for sanding surfaces. It measures at 5-1/2 inches by 9 inches and has a grit size of 500A A-weight.

  2. How many sheets are there per case?

    There are approximately 2000 sheets per case of the 3M™ Paper Sheet, providing you with plenty to use in your projects.

  3. What types of surfaces can be sanded using this paper sheet?

    This paper sheet is versatile and works on wood, paint, metal, and plastic.

  4. Can these sheets be cut down to smaller sizes if needed?

    Yes! These paper sheets are flexible enough to be cut down into any shape or size that may better suit your project's needs.

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
Extra Fine and Indispensable

Few shops can do without abrasives in handy sheet form, and 3M™ Paper Sheet 405U is built to be indispensable. A flexible A-weight paper backing provides excellent conformability and silicon carbide abrasive mineral delivers exceptional finishes.

Silicon carbide abrasive sheets create a smoother finish than aluminum oxide products on most substrates. Although it breaks down faster than aluminum oxide, it produces a superior finish. A resin bond construction provides superior grain retention while the open coat construction, along with the load-resistant coating, combine to provide excellent anti-loading characteristics.

These versatile sanding sheets contain the ideal abrasive grain type and grades for multi-step finishing processes.

Paper Backing for Conformability to Contours

The light A-weight backing provides conformability over contours and into crevices and corners. The sheet can also be easily cut to fit a hand pad block, inline sander, or finishing or power sanders. Other applications include general sanding, finishing, blending, surface leveling, prep prior to staining/painting and scuff sanding between coatings.

Recommended Applications

Silicon carbide is a synthetic mineral that is very sharp and commonly used for final finishing in white wood sanding. It is ideal for general purpose sanding on wood, metal, plastic, dry wall, fiberglass, glass and ceramic materials as well as contour blending.

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