3M™ Wetordry™ Paper Sheet 431Q combines extra-fast cutting silicon carbide with a durable C-weight, waterproof paper backing, delivering superior performance in both wet and dry sanding applications. Ideal for use on a wide range of substrates—including paint, primer, gel coat, metal, and wood—these sheets offer exceptional surface finishing and material removal.

Thanks to its wet sanding capability, the sheet allows for rinsing during use, reducing clogging and airborne dust while maintaining a clean cut and consistent efficiency. This makes it especially effective on dust-prone surfaces like paint and primer.

Widely used in the marine industry, the 431Q is perfect for sanding old finishes, fine feather edging, and general surface preparation. The standard 9" x 11" sheets can be easily trimmed to fit your specific application.