How To Clean Exposed Aggregate Concrete

Exposed aggregate concrete by nature will gather dirt, dust, and debris and get dirtier as time passes. It is highly recommended that you clean and seal it to help keep it looking great.

When cleaning exposed aggregate concrete, the following information will help guide you along the path to success.  First thing is to choose the easiest and least exhaustive method while providing a clean surface when done.

The first thing to do is to choose a test patch and attempt to clean a small inconspicuous area.  Often times the exposed aggregate captures dirt and grime or moss (in damp locations) and should be softened with a light degreaser or cleaner.

  • Step 1 – Saturate the surface with a cleaner leaving it to absorb into the concrete.
  • Step 2 – While the surface remains wet, scrub the surface with a stiff bristled broom to agitate and help the cleaner penetrate and loosen the dirt.
  • Step 3 – Use a hose with a nozzle or ideally a high power pressure washer to sequentially move from the high end of the concrete slab to the lower drain area.
  • Step 4 – Let dry
  • Step 5 – Protect the finish by sealing the Exposed Aggregate Concrete Slab.