Coated Abrasives
3M Cubitron II Sandpaper - Weld Blending

Sandpaper was the foundation on which S.O.T., "Sandpaper of Texas,” was built. Sandpaper’s range of capabilities was also behind the concept for our motto “The Start of a Good Finish”.


Sandpaper applications range from: stock removal, blending, surface preparation, graining, fine finishing and polishing.  


Sandpaper products, also known as coated abrasives, are made from three components:

  1. an abrasive grain

  2. the backing on which the grain is adhered

  3. an adhesive bond 


Coated abrasives grains include: 

  • Aluminum Oxide

  • Zirconia Alumina

  • Ceramic Alumina

  • Silicon Carbide.

  • Combination grains (These have become more common, offering faster cut or extended life, while keeping costs low.)  

Sandpaper is available in closed or open coat formulations:

  • Open coat, 50% to 75% coverage of abrasive grain, can provide faster cut in some applications, or reduce the potential for soft material loading the sandpaper.

  • Closed coat has full coverage of grain, offering finer finishing capabilities and longer life on harder materials.

Backing material used for sandpaper are paper, cloth, fiber, film, or sponge: ​

  • Paper backing is rated from lightweight “A-D” for discs and sheets, and heavier “E & F” for belts.  

  • Cotton cloth backing is common in light, flexible “J” weight, and “X” weight for more durability on discs and belts.  

  • Polyester cloth provides less stretch for wet sanding or heavy pressure belt applications in “X” or “Y” weights.  

  • Fiber backing is a durable backing used to make discs for stock removal or blending applications.  

  • Polyester film provides enhanced finishing characteristics in discs, sheets and belt products.

  • Sponges are available in different thicknesses and flexibility for contour and profile finishing.

Majority of the adhesive bonds have evolved from glues to resins for improved life and performance. Specialty coatings include grinding aids or top coats to prevent heat build-up during stock removal or blending applications. Anti-static coatings can be added for wood and composite sanding application. Non-loading additives prevent loading on wood or soft alloys to extend production life.  

Structured abrasive products can provide exceptional finishing capabilities over conventional coated abrasives. Compact, or agglomerate surface, contains a unique cluster of abrasive grains to provide consistent cut and finish, while combining extended life.  Contact S.O.T. to learn more about these products.


Coated abrasives are available in a wide range of options for your finishing needs:

  • Discs

  • Belts

  • Sheets

  • Rolls 

Coated abrasives are used to make a variety of specialty products:

  • Cartridge Rolls

  • No-Lap Spiral Bands

  • Flap Wheels

  • Flap Discs

  • Quick-Change Roll-Lock and Turn-On Discs 

  • Sanding Stars

  • Overlap Discs

  • Spiral Bands

  • Cross Pads