Mirka Galaxy 5-in. PSA Film Sanding Disc with Quick Peel Tab (FY-332-080)

The Mirka GALAXY 5 in. PSA w/Quick Peel Tab Sanding Disc 80 Grit, model FY-332-080, is a film-backed abrasive disc built for sanding and surface prep across multiple materials. This is a sanding disc designed for fast stock removal, surface leveling, and finish preparation. It is a strong fit for automotive refinish work, marine production, vehicle manufacturing, collision repair, woodworking, and serious shop use where cut speed and disc life both matter.

What makes this disc worth a look is the ceramic grain. Mirka built the Galaxy line around self-sharpening abrasive particles, so as the grain breaks down, it keeps creating fresh cutting points instead of going dull all at once. On the job, that means the disc keeps cutting more consistently through a sanding cycle. If you are moving through primer, paint, filler, sealers, soft wood, hard wood, or mixed substrates, that kind of steady performance saves time and helps keep your finish predictable.

The 5 inch size and PSA backing make this a straightforward choice for users running pressure-sensitive adhesive sanding pads. The quick peel tab is one of those simple features that actually helps when you are working through grit changes. It gives you a cleaner way to remove the disc without fighting the adhesive edge, which is especially useful in prep work where you may step through multiple grits in one session.

Mirka also built Galaxy as a multipurpose abrasive rather than a niche disc for one material only. According to the product data, it is suitable for both soft and hard materials as well as various substrates. That makes it practical for mixed-work environments where one bench may see body filler in the morning and wood parts or composites later in the day. For a shop trying to simplify inventory without giving up performance, that broad use range is a real advantage.

Dust handling is another big part of the story here. The product is described with excellent clog resistance, a dust repellent coating, and support for optimal dust extraction. In plain terms, that helps the abrasive face stay more open instead of packing up early. A disc that resists loading tends to cut more evenly and hold its finish quality longer, which means less wasted time chasing scratches left by a clogged abrasive.

The film backing matters too. Film-backed sanding discs are generally chosen because they hold up well, resist tearing better than paper in demanding use, and stay consistent during edge work. Mirka specifically calls out superb edge wear resistance, which is important when you are sanding contours, working panel edges, or blending in tighter areas where the outer edge of the disc takes more abuse.

Compatibility is simple and practical. The Mirka GALAXY 5 in. PSA w/Quick Peel Tab Sanding Disc 80 Grit is meant for 5 inch PSA-style sanding setups, so it belongs with sanders and backup pads made for pressure-sensitive adhesive discs. If your workflow already uses PSA abrasives and you want a disc that cuts fast, sheds dust well, and comes off the pad without a fight, this one makes sense.

Who should buy it? If you are a body shop tech, painter, woodworker, marine fabricator, or serious DIY user who values clean sanding and efficient grit changes, this is the type of abrasive that earns its keep. The 80 grit version is a practical choice when you need aggressive material removal and surface prep before moving to finer steps. It is not a finish-only disc. It is a working grit for getting a surface into shape quickly and cleanly.

Mirka GALAXY 5 in. PSA w/Quick Peel Tab Sanding Disc 80 Grit Gets the Dirty Work Done

This is the kind of abrasive you buy when you care less about hype and more about how long the disc keeps cutting once the job gets real.

• Who it’s for: Body shop techs, painters, woodworkers, marine shops, and serious DIY users who need a 5 inch PSA sanding disc for heavier prep and material removal.
• Why it stands out: The ceramic grain, film backing, clog resistance, and quick peel tab all work together to give you a disc that cuts fast, resists loading, and is easier to change.
• Worth knowing: This 80 grit version is a working prep grit, not a final finish disc. If you want a finer finish, plan to step up through finer grits after your initial shaping and leveling passes.

• What type of sander setup does this use? It is designed for 5 in. PSA sanding setups, meaning a pressure-sensitive adhesive backup pad or sander that accepts PSA discs.
• What materials can it be used on? Source data describes it as a multipurpose abrasive suitable for both soft and hard materials as well as various substrates.
• What is the benefit of the ceramic grain? The ceramic grain is engineered to self-sharpen, which helps the disc maintain cut speed and usable life longer during sanding.
• Is this a good choice for dusty sanding work? Yes. The product data specifically calls out clog resistance, dust repellent coating, and support for optimal dust extraction.