3M 7000045221 Abrasive Disc 1500 Grit 12 Inch Wet or Dry

Product Description

The 3M 7000045221 is a 12-inch wet or dry abrasive disc designed for fine finishing work on a range of surfaces. Built on the 401Q platform, it uses silicon carbide mineral bonded to an A-weight waterproof paper backing. Silicon carbide cuts faster than aluminum oxide and leaves a smoother scratch pattern, making it well suited for high-grit finishing stages. At 1500 grit, this disc is intended for final surface prep, paint leveling, and pre-polish work. Licensed tradespeople and finishing technicians reach for this disc when a clean, uniform scratch pattern is required before compounding or buffing.

This disc is used in both wet and dry sanding applications across automotive refinishing, marine gel coat finishing, metal fabrication, and wood finishing. The waterproof backing allows water or lubricant to be used during sanding, which reduces loading and extends disc life. It is equally suited for hand sanding blocks and orbital or random-orbit machine sanders. Typical use cases include leveling primer, smoothing paint between coats, and preparing gel coat for polishing compounds.

Key Features

• Silicon carbide mineral cuts faster than aluminum oxide and produces a finer finish at equivalent grit levels
• A-weight waterproof paper backing supports both wet and dry sanding without delaminating
• Waterproof construction reduces loading and extends disc life in wet applications
• 1500 grit rating suited for paint leveling, primer finishing, and pre-polish surface prep
• Compatible with hand sanding and machine sanding applications
• Suitable for use on paint, primer, gel coat, metal, and wood substrates

Compatibility

Designed for use on 12-inch backing pads for hand or machine sanding applications involving paint, primer, gel coat, metal, and wood surfaces.

Installation Notes

This disc is installed and removed by finishing technicians or abrasives users — no licensed trade certification is required, but proper PPE including eye protection and a dust mask or respirator should be worn. When sanding wet, ensure adequate ventilation and avoid pooling water near electrical equipment. Inspect the disc before each use and discard if the backing shows tears, delamination, or mineral loss. Do not exceed the speed rating of the backing pad or sander being used.

Technical Specifications

• Diameter: 12 inches
• Grit: 1500
• Abrasive Mineral: Silicon Carbide
• Backing Weight: A-Weight Paper
• Backing Type: Waterproof
• Application Type: Wet or Dry
• Package Weight: 7.381 pounds
• Package Length: 13 inches
• Package Width: 12.63 inches
• Package Height: 4 inches
• Unit of Measure: Each
• Minimum Order Quantity: 250
• UPC: 051141279218

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000045221