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SKU 7000118313
Legacy SKU 60070015700
UPC 00051144106998
Product Number 431Q

3M™ Wetordry™ Paper Sheet 431Q features extra-fast cutting silicon carbide on a strong C-weight, waterproof paper backing to provide superior finishing for both wet and dry applications on a variety of substrates, including paint, primer, gel coat, metal, and wood.

  • Versatile sheet can be used wet or dry on paint, primer, gel coat, metal, and wood finishes
  • Waterproof backing supports wet applications for decreased loading and a faster cut
  • Strong C-weight paper backing provides durability for either hand or machine sanding
  • Silicon carbide mineral produces a smoother finish than aluminum oxide
  • Sheet is standard 9 x 11 and can be sized according to task
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On it's way to you October 11   


Minimum Order 500 Sheets
Order Increment 500 Sheets
  Immense Durability
  Reduces Abrasive Costs
  Lowest Price Per Item
Product Dimensions
Imperial Metric
Width 11 in 279.4 mm
Length 9 in 228.6 cm
Shipping Dimensions
Weight 18.35 lb
Length 11.96 in
Width 9.51 in
Height 8.95 in
Color Black
Grit 240


  1. What is 3M™ Wetordry™ Paper Sheet 431Q?

    3M™ Wetordry™ Paper Sheet 431Q is a sandpaper sheet that can be used for both wet and dry sanding applications.

  2. What does the "240 C-weight" mean?

    The "240 C-weight" refers to the strength of the paper. In this case, it indicates that the paper has a medium level of durability.

  3. How big are these sheets?

    These sheets measure 9 inches by 11 inches, making them a standard size for most sanding jobs.

  4. How many sheets come in each package?

    Each package contains 50 sheets, and there are a total of 500 sheets included in each case.

  5. Can I use these sandpaper sheets on any surface?

    Yes! These versatile sandpaper sheets can be used on a wide range of surfaces including metals, woods, plastics and more.

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.
3M™ Wetordry™ Paper Sheets

3M™ Wetordry™ Paper Sheets are a versatile abrasive product that can be used dry or with water. They are designed to prevent dust and debris from clogging the abrasive points, while producing a faster cut at the same time. These sheets are ideal for surfaces that tend to generate a lot of dust, such as paint and primer. They can also be used dry for finishing metal and gel coats. In the marine industry, they are used for sanding old finishes, fine feather edging, and surface work. The standard 9 inch x 11 inch sheets can be cut to size for the application.

Silicon Carbide

Silicon carbide is a very hard mineral that is characterized by sharp points that fracture easily, resulting in freshly exposed sharp edges that cut extra fast and produce a smooth, professional-looking finish. Silicon carbide products are commonly used for low-pressure applications such as paint prep and finishing on wood and metal. While the mineral has a shorter life than aluminum oxide, it produces a superior finish.

Waterproof Paper Backing

3M™ Wetordry™ products are backed with a proprietary waterproof paper backing that supports both wet and dry applications. Lighter weight than cloth and smooth rather than textured, paper backing is preferable for lighter applications such as finishing and paint prep. At the same time, many such applications produce a significant amount of dust, clogging the abrasive points and creating an inferior work environment. These effects can be minimized by sanding with water to rinse dust away from the workpiece and the abrasive surface.

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