How to Restore Polished Concrete
Polished concrete surfaces can lose their clarity and shine. The good news is that you can restore the luster of worn polished concrete through a simple step-by-step process. In this guide, we will walk you through the key steps involved in restoring polished concrete surfaces.
Table of Contents
Step 1: Create a New Scratch
To begin the restoration process, start by using a 100 grit Terrazzo pad. This copper pad is typically used as a transitional diamond but serves a different purpose here. By running it over the surface with water and a six-tool propane rotary, a new scratch is created. This step eliminates previous polishing and prepares the surface for refining.
Step 2: Remove Previous Scratches
Once the new scratch has been made, collect the slurry using a wet vac. Next, switch to a 200 grit Terrazzo copper pad. This pad’s role is to remove the scratches created by the 100 grit pad, following the principle of using progressively finer grits to achieve a polished finish. Run the pad over the surface to ensure a smooth transition.
Step 3: Wash and Apply Densifier
After collecting the slurry, wash the floor using an auto scrubber or a broom and water. The aim is to remove any dried slurry from the pores of the concrete. Once dry, apply a densifier to harden the surface. The densifier reacts with the calcium hydroxide in the concrete, resulting in the growth of crystalline structures and densifying the floor.
Step 4: Refine with Resin Diamonds
Following the densifier application, switch to a 200 grit resin diamond pad to further refine the surface. This step replaces the more aggressive scratch with a finer one, enhancing the overall smoothness of the concrete. Remember to perform this step wet.
Step 5: Enhance Reflectivity and Clarity
Continuing with the refinements, progress to a 400 grit resin diamond pad, which will replace the previous scratches with a 400 grit scratch. This step not only increases reflectivity but also improves clarity by defining objects and light reflected on the surface.
Step 6: Finalize the Restoration
For the final polishing touch, use an 800 grit resin diamond pad. This last step removes and replaces the 400 grit scratches, further improving reflection and producing enhanced clarity. The result is a beautifully restored polished concrete surface with an 800 grit finish.