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What is Polished Concrete?

Polished concrete is a process which enhances the natural beauty of existing concrete by hardening and polishing the concrete.

Traditionally, to achieve a “polished" look on a concrete floor, a build-up of a chemical product was applied to the concrete.  Types of topical seal would include epoxy wax, urethane, and polyspartic coatings.  This process does not hold up as a diamond mechanical polished floor. The floor surface coating would frequently need to be reapplied.  This process is not to be confused with a mechanically polished floor.  

Modern Polished Concrete
• A mechanical grinding & polishing process utilizes industrial diamonds & impregnating hardeners and sealers to level, densify, polish & finally seal the floor from within the interior of the floor surface.  Mechanical grinding is a multistep process using heavy duty grinding machines with diamond bonded pads of different grits. We start with aggressive metal bonded diamonds and progress to finer resin bits. There are no waxes or topical coatings. We use densifiers which harden the concrete and penetrating sealers which help protect the surface from spills, oil, water, etc. The end result is a hightly durable floor with a shine level created by diamond grinding

• A Mechanical Polish will grind and seal the surface of the concrete, giving the appearance of a rich stone-like finish with a choice of sheen levels. The surface will be flattened, and ground smooth to remove any course texture or ridges.

Aggregate Exposure: Grinding a concrete surface with bonded abrasives, in as many abrasive grits necessary to achieve one of the following:

ClassNameSurface Cut DepthAppearance
ACream$Very littleLittle aggregate exposure
BFine Aggregate (Salt and Pepper)$1/16 inchFine aggregate exposure with little or no medium aggregate exposure at random locations
CMedium Aggregate$$1/8 inchMedium aggregate exposure with little or no large aggregate exposure at random locations
DLarge Aggregate$$$1/4 inchLarge aggregate exposure with little or no fine aggregate exposure at random locations

Reflective Clarity and Reflective Sheen: Before application of a polish guard, polishing a concrete surface with the minimum number of bonded abrasives as indicated to achieve one of the following:

LevelName Reflective ClarityReflective Sheen Grit RangeMinimum # of Abrasives
1Ground$ Flat appearance with no to very slight diffused relection None to Very LowBelow 100 4
2Honed$ Matte appearance with or without diffused reflection Low to Medium100 to 400 5
3Semi Polished$$ Objects being reflected are not quite sharp and crisp but can be easily identifiedMedium to High 800 and Higher 6
4Highly Polished$$$ Objects being reflected are not sharp and crisp as would be in a mirror like reflectionHigh to Higher 7
   
   
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