Skip to main content

Open coating – works up to 20% faster

Conventional: Closed coating

The conventional electrostatic grit coating method is closed coating.

New: open coating

Open coating from sia Abrasives has optimised grit positioning to provide an improved removal rate with minimal clogging.


  • Minimal clogging due to open coating technology and optimised stearate composition (zinc-free)
  • Maximum removal rate
  • Longest lifetime
  • Lower abrasive consumption
  • Higher efficiency
  • Lower costs

Performance comparison


  • 1950 siaspeed, P240, 150 mm diameter, 15-hole


  • Random orbit sanding: 5 mm stroke, soft backing pad. Surface: filler, Unipol polyester filler
  • Robotised machine under laboratory conditions