Quick Answer

Strip industrial paint and sealers with PCD diamond tooling, not metal bond. PCD shears epoxy, polyurethane, and acrylic sealers off in sheets. Expect 200-500 m2 per day on a push grinder, then follow with a 30/46 metal-bond cleanup pass to profile the slab for the new coating.

Why PCD, Not Metal Bond

A metal-bond disc tries to grind through sealer, but the resin softens and loads the segment. PCD (polycrystalline diamond) does not soften: it chips and peels the coating. Our Redi-Lock PCD discs is built for this exact job.

Typical Production Rates

Coating	Thickness	PCD rate (m2/hr)
Acrylic sealer	thin	40-60
Epoxy paint	100-300 microns	25-40
Heavy epoxy build-up	1-3 mm	10-20
Polyurethane topcoat	thin	30-50

Two-Pass Process

1. PCD pass: strip the coating. Expect shavings and chips.
2. Metal-bond cleanup: 30/46 grit like our R3 round-segment shoes to remove residue and open the concrete.
3. Vacuum thoroughly. Any residual film will interfere with the new coating.

Browse concrete grinding discs category for PCD and metal-bond sets.

Frequently Asked Questions

Q: Can I chemical strip instead?

For small rooms, yes. For a 500 m2 plant floor, grinding is faster and avoids chemical disposal.

Q: Does PCD damage the concrete?

No. PCD removes the coating, not the concrete. It leaves a light scratch that metal bond cleans up.

Q: How do I know when to switch to metal bond?

When you see uniform gray concrete instead of coating color.

Conclusion

Industrial sealer removal is a PCD job. Strip, cleanup, vacuum, then re-coat. contact JOY TECH for PCD discs sized to your grinder.