The Mirka Q.Silver 220 Grit Aluminum/Silicon Carbide Abrasive Disc is a 5 inch abrasive disc built for surface preparation, fine sanding, and finishing work across metal, wood, composites, plastics, and coatings. This is a hook and loop sanding disc designed for efficient stock removal and controlled surface prep. Model Number: 2B-612-220. If you need a disc that can move from body filler and primer into harder substrates without giving up cutting speed, this one is aimed right at that kind of work.

What matters here is the abrasive mix and how it behaves under load. Mirka lists this disc as aluminum oxide and silicon carbide, which gives it a broad working range for different materials and sanding stages. The 220 grit rating puts it in a finer range, making it useful when you are refining a surface rather than doing the roughest cut. That makes sense for prep before paint, smoothing primer, working veneers, or cleaning up a surface after more aggressive grits have already done the heavy removal.

Mirka also calls out strong, flexible impregnated latex paper backing. In plain terms, that backing helps the disc stay usable while conforming better than a stiff disc on curves and irregular surfaces. On automotive panels, marine surfaces, or shaped wood parts, that matters. You get a disc that is easier to keep in contact with the work instead of one that wants to chatter or cut unevenly.

Heat is where a lot of sanding discs fall off. Q.Silver is fully resin bonded and described as having high heat endurance, which is important for demanding sanding and down-to-metal operations. If you are stripping paint, leveling body filler, or working stainless steel or mild steel, heat resistance helps the abrasive hold up longer and keeps performance more consistent during longer sanding passes.

This disc is positioned as a multi-material option, and the listed application range is wide: hardwood, MDF, HDF, stainless steel, mild steel, carbon steel, paint removal, lacquers, plastics, body filler, primer, solid surfaces, and veneers. That kind of range is useful in shops that do not want to keep changing product lines every time the material changes. For an automotive refinisher, cabinet shop, marine tech, or composite fabricator, that versatility is a real advantage.

The 5 inch diameter is a standard working size for many random orbit sanders and similar sanding setups that use grip style discs. For buyers already working with hook and loop sanding discs, this format is easy to drop into the workflow. The pack of 50 also makes sense for shop use where discs are consumables and buying singles is just not practical.

Who should buy it? This is a good fit for automotive refinishing, wood processing, composite processing, marine work, and vehicle manufacturing. It also works well for serious DIY users who want a better consumable for prep and finishing work, not just the cheapest disc on the rack. If your work jumps between primer, filler, paint, hardwood, and metal, the Mirka Q.Silver 220 Grit Aluminum/Silicon Carbide Abrasive Disc is the kind of sanding disc that earns its keep by staying versatile and cutting efficiently.

Mirka Q.Silver 220 Grit Aluminum/Silicon Carbide Abrasive Disc for shops that burn through consumables

This is a practical, work-ready sanding disc for users who care more about consistent cut and broad material range than fancy packaging.

• Who it's for: Automotive refinishers, woodworkers, marine techs, composite shops, and serious DIY users doing regular prep and finish sanding.
• Why it stands out: The latex paper backing, resin bonded construction, and heat-tolerant abrasive mix make it a solid choice for demanding sanding across metal, coatings, filler, and wood.
• Worth knowing: This is a 220 grit disc, so think refinement and prep, not heavy stripping. If you are starting with rough material, step down to a coarser grit first.

• What size is this abrasive disc? It is a 5 inch diameter abrasive disc.
• What grit is it? This Mirka Q.Silver disc is 220 grit.
• What materials can it be used on? Listed applications include hardwood, MDF, HDF, stainless steel, mild steel, carbon steel, paint, lacquers, plastics, body filler, primer, solid surfaces, and veneers.
• Is it made for demanding sanding work? Yes. Mirka states that the fully resin bonded abrasive has high heat endurance and is suited for tough sanding tasks, including down-to-metal operations.