For removing thick coatings like epoxy, glue and mastic, PCD (polycrystalline diamond) tooling wins — it scrapes and shatters the coating off fast without loading up. Standard diamond grinding segments win when the coating is already thin, or when you need a smooth, polished surface immediately after removal. The fastest approach on most jobs: PCD first to strip the coating, then diamond grinding to clean and finish the concrete.
PCD tools carry small, very hard polycrystalline diamond tips on metal holders. Their cutting action is a scraping/shattering motion that attacks the coating-concrete interface, so thick epoxy and mastics peel off in sheets instead of grinding into dust. Diamond segments, by contrast, cut with abrasive friction — on a soft, sticky coating they smear, heat up and clog, which slows them down dramatically. This is why contractors time and again reach for PCD when the floor is covered in glue or epoxy.
| Factor | PCD Tooling | Standard Diamond Grinding |
|---|---|---|
| Best for | Thick epoxy, glue, mastic, paint | Thin residue, laitance, concrete leveling |
| Speed on coatings | Very fast, peels coating off | Slow, can clog on sticky coatings |
| Heat buildup | Low | High on sticky surfaces |
| Surface result | Rough, textured, ready for next step | Smooth, fine scratches |
| Dust | Coarse flakes | Fine dust |
| Cost per m² | Lower on coated floors | Higher when coating is thick |
This hybrid workflow is what most professional contractors use — WerkMaster PCD Tooling for Coating Removing strips the coating, then a PCD Cup Wheel (JOY-CW-PCD6) or standard segments finish the job.
A: Yes. PCD plates are made for standard floor grinders with compatible connections — check whether your machine needs a specific holder, adapter or quick-change system before ordering.
A: PCD leaves a rough textured surface, which is exactly what you want before coating or before the grinding sequence. The scratches are removed in the following grinding steps if you are polishing.
A: Sticky coatings melt and smear under frictional heat, filling the matrix of the segment. PCD's scraping action avoids this — switch to PCD for the coating stage, then back to segments for the concrete.
A: PCD tooling has a higher upfront price, but on coated floors it removes material much faster, so the cost per square meter is usually lower. On clean concrete, standard segments are more economical.
A: Dry operation is standard for PCD coating removal; the scraping action generates little heat. Some contractors use a dust shroud with a vacuum to keep the site clean.
For coating removal, PCD is the clear winner on thick epoxy, glue and mastic, while diamond grinding is the right tool for cleaning up and finishing. Use them together — PCD to strip, grinding to finish — and your floor prep time will drop dramatically. JOY TECH offers PCD tooling for WerkMaster, Husqvarna, EDCO, HTC and more, plus the full metal bond range to continue into the polish stage. Browse our PCD coating removal tooling or PCD cup wheels to find your match — tell us your coating type and machine, and we will recommend the right setup.
