Slip Stream 24/7 – Global Supply and Distribution Company providing 3M Industrial, Commercial & Safety Solutions
English Spanish
SKU 7100031595
Legacy SKU 60070015726
UPC 00051144106950
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
  Add to cart
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 9 in 228.6 mm
Length 11 in 279.4 mm
Shipping Dimensions
Weight 15.4 lb
Length 11.9 in
Width 9.6 in
Height 7.3 in
Color Black
Grit 400


  1. What are the dimensions and quantity of 3M™ Wetordry™ Paper Sheet 431Q that come in a case?

    The paper sheets measure 9 inches by 11 inches, and there are 50 sheets per inner pack, with a total of 500 sheets per case.

  2. What is the weight or grit level of these sandpaper sheets?

    These wet/dry sandpaper sheets have a C-weight backing and features silicon carbide abrasive mineral, which offers great durability as well as uniform finishing. Additionally, they have an abrasive grit rating of P400 (coarse).

  3. Can I use these wet/dry sandpaper sheets for various applications?

    Yes! These versatile paper sheet can be used on automotive surfaces such as clear coats, primers or paints; metalwork; plastics; composites; fiberglass gelcoat including scratch refinement during step one (400 grit) of the three-step body repair process. They produce outstanding finishes throughout their life span thanks to its super sharp abrasive minerals.

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.

Brochures, Catalogs & Data Sheets
Other Products in this Family

Lead times are estimates and may vary based on our suppliers' product availability.