The Mirka 23-332-180 PSA Disc is a 5-inch pressure sensitive adhesive sanding disc built for finish sanding and surface preparation. This is a sanding disc designed for smoothing, blending, and material removal on wood, metal, and composite surfaces. Model Number: 23-332-180. If you need a dependable P180 abrasive for shop work or production sanding, this one is aimed at users who want a clean, even scratch pattern in a box-ready quantity.

This Mirka disc uses aluminum oxide abrasive on a paper backing with a coated abrasive construction. In practical use, that means a solid balance of cut speed, durability, and control. The P180 grit sits in a useful spot for refining surfaces after earlier shaping or heavier stock removal, and it works well when you are stepping toward paint prep, finish prep, or final smoothing before moving to finer grits.

One of the important details here is the pressure sensitive adhesive backing. PSA discs are a good choice when you want full-face contact and a secure hold on the sanding pad. That matters for consistent sanding across flat surfaces and for minimizing edge lift during longer passes. Because this version is a no-hole disc, it is best suited to compatible non-vacuum pad setups or jobs where dust extraction through the disc is not required.

Mirka lists this disc in the Bulldog Gold-23 series, and the web data adds useful context on what that means in the real world: durable aluminum oxide grain, high-strength resin bonding, a stronger proprietary backing, and a stearate coating to help resist clogging and loading. Those details matter most when you are sanding materials that can gum up cheaper paper. Better resistance to loading usually means steadier cut quality and fewer disc changes through the job.

The 5-inch diameter makes this abrasive a common fit for random orbital and finish sanding workflows that use PSA-compatible pads. With 100 discs per package, this is clearly set up for users who go through abrasives regularly rather than someone buying one or two discs at a time. That pack size makes sense for cabinet shops, body and paint prep work, maintenance departments, and serious DIY users who want matching discs on hand for repeatable results.

If your work involves wood surface prep, metal finishing, or composite sanding and you prefer PSA-backed abrasives, this Mirka disc is a practical choice. It is especially well suited to users who already know where P180 fits in their sanding sequence and want a consistent, professional-grade consumable instead of bargain-bin paper that burns up too fast.

Mirka 23-332-180 PSA Disc Is a Smart Shop Staple

If you burn through sanding discs and need a dependable 5-inch P180 option, this is the kind of abrasive that earns a permanent spot on the shelf.

• Who it's for: Woodworkers, finish guys, body prep users, and serious DIYers running PSA-compatible sanders.
• Why it stands out: Good grit choice, aluminum oxide durability, anti-loading stearate, and a 100-pack that makes sense for real workflow.
• Worth knowing: This is a no-hole PSA disc, so make sure your pad setup matches before you order.

• What grit is this disc? It is P180 grit.
• Does this disc have vacuum holes? No. This version uses a no-hole design.
• What kind of backing does it use? It uses a pressure sensitive adhesive backing on a paper-backed coated abrasive disc.
• What materials is it suited for? The source data lists wood, metal, and composites.