Key Features
Overview
The Mirka 23-379-120 Gold 6 in. PSA sanding disc is a pressure-sensitive adhesive abrasive disc built for sanding and surface preparation. This is a sanding disc designed for stock removal, smoothing, and prep work on a 6-inch PSA sanding setup. Model Number: 23-379-120. With a 120-grit rating and a 100-count box, it is aimed at users who need a dependable everyday abrasive for steady shop or jobsite use.
What matters here is not just the grit number, but how the disc is built to hold up while working. Mirka calls out resin bonding for strong grain support, along with an excellent grain distribution that helps deliver a more consistent sanding result from disc to disc. In practical terms, that means less guessing, less uneven cutting, and a more predictable finish as you work through a stack of discs.
The special stearate coating is a big part of why this disc stands out. When you are sanding materials that tend to load up abrasives, clogged discs stop cutting and start wasting time. This coating is there to maximize resistance to clogging and loading, so the abrasive stays usable longer and keeps cutting more consistently instead of glazing over early.
Backing matters too, especially on a disc that is going to see repeated use. The C/D weight latex backing is built to combine toughness with flexibility. That gives the disc enough durability for regular sanding work while still allowing it to conform where a little give helps the abrasive track better across the surface.
Because this is a PSA sanding disc, it is intended for 6-inch pressure-sensitive adhesive sanding pads and compatible sanders. That style of attachment gives you a secure hold and quick disc changes when the pad is set up for PSA abrasives. If your sander is built around hook and loop discs instead, this is not the right format.
This Mirka sanding disc makes the most sense for users who go through abrasives regularly and want a known quantity instead of bargain paper that cuts once and quits. If you need a 6-inch 120-grit PSA disc with a box quantity that makes sense for real work, this one is built for exactly that.
What’s in the Box
- (100) Mirka Gold 6 in. PSA sanding discs
- 120 grit
Key Specifications
| Disc Diameter | 6 in. |
|---|---|
| Grit | 120 |
| Backing Type | PSA (Pressure-Sensitive Adhesive) |
| Quantity | 100 discs per box |
| Bonding | Resin bonding |
| Coating | Special stearate coating |
| Backing Weight | C/D weight latex |
| Weight | 1.8 lbs |
Compatibility
Tool Nut’s Take
Mirka 23-379-120 Gold 6 in. PSA Sanding Disc for steady, repeatable sanding work
This is the kind of abrasive you buy when you care more about consistent cut and less about gambling on cheap discs.
- Who it’s for: Anyone running a 6-inch PSA sander and burning through discs on regular prep or finish sanding work.
- Why it stands out: The stearate coating, resin bonding, and latex backing all point to the same thing: longer useful life and more predictable sanding.
- Worth knowing: Make sure your pad uses PSA discs. If your sander is hook and loop, this is the wrong attachment style no matter how good the abrasive is.
Common Questions
- What grit is this sanding disc? This disc is 120 grit.
- How many discs come in the box? The box includes 100 discs.
- What size sander does it fit? It is a 6-inch disc for PSA sanding setups.
- What helps it resist loading? Mirka specifies a special stearate coating to maximize resistance to clogging and loading.
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