What You Need to Know About Concrete Polishing

Concrete polishing can either be completed using dry or wet methods. Each method has their advantages and disadvantages, so it is best to know each one before considering using it for concrete polishing. The dry method is commonly used today due to its environment-friendly and ease of use features.

On the other hand, the wet method uses water to keep the diamond abrasive cool and eliminate grinding dust. The water minimises the friction and working as a lubricant, thus maximising the life of the polishing abrasives.

The disadvantage of this method is the cleanup as it creates a huge amount of slurry that workers need to collect and dispose of in an environmentally sound manner. Unlike with the dry method in which water is not a requirement as the floor polisher is hooked up to a system of a dust container that will vacuum all the mess.

If you are wondering how to do the concrete polishing, here are the steps you need to follow:

  • Remove the existing coating. For thicker coatings, a 16 or 20 grit diamond abrasive or tool more aggressive to that is required to remove them
  • Use an epoxy or any semi rigid filler to seal joints and cracks
  • Once sealed, grind the floor using a 30 to 40 grit metal bonded diamond
  • Using an 80 grit metal bonded diamond, grind the floor
  • Use a 150 grit metal bonded diamond, or finer, to grind the floor
  • To densify the concrete, apply a chemical hardener (you can buy them at a local hardware)
  • Polish using a 100 or 200 grit resin bond diamond. You can consider combining the two if desired
  • Use a 400 grit resin bond diamond, polish the floor
  • Polish with a resin bond diamond with 800 grit
  • For finishing, depending on the level of shine you want to achieve, use a 1500 or 3000 grit resin bond diamond
  • This is not required: apply a stain guard to give protection to polished surface to make the floor a lot easier to maintain

If you cannot perform the above steps, then contacting a professional is recommended to ensure a satisfactory result. Check out armstrongfloors.com.au for more information.