Mirka Iridium SR 33/36mm 5µ Rosette Grip Finishing Abrasive Disc (24-689-5U)

The Mirka Iridium SR Rosette Grip is a premium finishing abrasive for high-end surface prep in automotive refinishing, collision repair, and transportation manufacturing. This is a finishing abrasive designed for the finest finishing stages before polishing or final coating work. Model Number: 24-689-5U. If you are working on clearcoat correction, top coat refinement, or composite finishing where the scratch pattern matters, this is the kind of abrasive that helps you stay consistent from panel to panel.

What separates this Mirka finishing abrasive from a generic sanding disc is how it is aimed at the last stages of the sanding process. Mirka states that the slurry coating produces a scratch pattern that is easy and fast to polish out. On the job, that means less time trying to chase sanding marks after the fact and a better shot at a predictable finish when you move into polishing or final inspection.

The abrasive uses silicon carbide grains, which makes sense for fine finishing work on clearcoats, top coats, and composites. Silicon carbide is known for leaving a sharp, refined cut, and here it is paired with a stable, robust backing so the abrasive performs consistently instead of feeling flimsy during delicate sanding steps. When you are working on finish-sensitive surfaces, that backing stability matters just as much as the grain itself.

The rosette grip format is built for fast attachment and removal with a compatible grip-faced backing pad. That makes it practical for repair shops and production environments where swapping abrasives quickly is part of the workflow. Based on the provided product data and packaging, this variant is a 33/36 mm rose grip abrasive in a 5 micron grade, which puts it squarely in precision finishing territory rather than general stock removal.

Mirka also positions the Iridium SR line for automotive refinishing and collision repair as well as transportation vehicle manufacturing. That tells you exactly who it is for: painters, body techs, detail-focused refinishers, and any shop doing high-standard surface finishing on coated parts or composite components. It is not the disc you grab for heavy removal. It is the one you reach for when surface quality is the whole point.

Compatibility is straightforward. Mirka specifically recommends using this abrasive with grip-faced backing pad 1125SG-R. If you already run a Mirka finishing setup and need a premium fine-stage abrasive that plays well in a repeatable process, the Mirka Iridium SR Rosette Grip is the right fit.

Mirka Iridium SR Rosette Grip for Finish Work That Actually Matters

This is the kind of abrasive you buy when the last sanding step can make or break the final result.

• Who it’s for: Body shops, refinish techs, and production finishers working on clearcoats, top coats, and composites.
• Why it stands out: The silicon carbide grain, stable backing, and polish-friendly scratch pattern are all aimed at clean, consistent fine finishing.
• Worth knowing: This Mirka Iridium SR Rosette Grip is a specialty finishing abrasive, so pair it with the recommended 1125SG-R backing pad and save it for the fine stages where it earns its keep.

• What is this product designed for? It is designed for the finest finishing stages in automotive refinishing, collision repair, and transportation vehicle manufacturing.
• What surfaces is it intended to sand? Mirka lists clearcoats, top coats, and composites processing as key applications.
• What abrasive grain does it use? It uses silicon carbide grains.
• What backing pad should I use with it? Mirka recommends using it with grip-faced backing pad 1125SG-R.