The Mirka 23-332-036 Bulldog Gold 5 in. P36 Heavy-Duty PSA Disc is a coarse 5-inch adhesive-backed sanding disc built for aggressive material removal. This is a sanding disc designed for heavy stock removal, surface prep, and early-stage sanding where speed matters more than finish quality. Model Number: 23-332-036. If you need to strip down a surface, flatten high spots, or start a sanding sequence with a fast-cutting abrasive, this is the kind of disc you reach for first.

The big selling point here is the P36 aluminum oxide abrasive. That coarse grit is meant to cut fast and leave a rougher scratch pattern that can be refined later with finer grits. In practical terms, it helps when you're dealing with old finishes, rough wood, filler shaping, or other jobs where lighter finishing discs would just waste time. This is not a finish sanding disc. It is the rough work disc that gets you to the next step faster.

Mirka uses a coated aluminum oxide abrasive with high-strength resin bonding, which matters because coarse discs get worked hard. The grain needs to stay supported so the disc keeps cutting instead of wearing out too quickly. The proprietary backing is also called out as stronger than traditional backing materials used by competing discs, which helps the disc hold together under heavier sanding pressure.

Another important detail is the anti-load stearate coating. On the job, that means better resistance to clogging and loading when dust starts building on the abrasive surface. A clogged disc stops cutting efficiently and starts generating heat. By resisting that buildup, this Mirka PSA disc stays productive longer and gives you more usable life per disc.

This disc uses a pressure sensitive adhesive backing, so it is intended for sanders or backup pads designed for PSA discs. That style of mounting gives you a full-face bond to the pad, which helps the disc sit flat and stay planted during sanding. The disc is also a no-hole design, so it is best matched with applications and pads where dust extraction holes are not required.

The 5-inch diameter is a common size for sanding work, making this disc a practical choice for shops and jobsite users already running 5-inch PSA setups. The pack includes 50 discs, which makes sense for production work, prep work, or any operation that burns through coarse abrasives on a regular basis.

Who should buy it? This Mirka sanding disc makes the most sense for woodworkers, refinishers, body shop users, fabricators, and serious DIYers who need a fast-cutting abrasive for prep work. If your goal is finish-ready results straight off the disc, go finer. If your goal is to remove material quickly and move the job along, this P36 disc is right in its lane.

Mirka 23-332-036 Bulldog Gold 5 in. P36 Heavy-Duty PSA Disc Gets the Ugly Work Done

This is the kind of coarse sanding disc you buy when removal rate matters and you do not want to burn time with finish-grade abrasives.

• Who it's for: Woodworkers, refinishers, body shop users, and serious DIYers doing rough prep and aggressive sanding.
• Why it stands out: P36 grit, aluminum oxide grain, anti-load coating, and a 50-pack format make it a practical shop consumable instead of a one-off disc.
• Worth knowing: This is a PSA no-hole disc, so make sure your sander or backup pad is set up for adhesive-backed 5-inch discs. It is also a coarse prep disc, not a finish sanding choice.

• What grit is this disc? It is a P36 abrasive, which is a coarse grit intended for heavy stock removal and rough prep work.
• Does this disc have dust extraction holes? No. This is a no-hole sanding disc.
• How does it mount to the tool? It uses pressure sensitive adhesive backing, so it is made for PSA-compatible 5-inch sanding pads.
• What abrasive material does it use? The disc uses aluminum oxide abrasive grain.