Concrete is porous, which means stains and organic growth can penetrate below the surface if left untreated for too long.
Oil and rust stains require targeted pre-treatment before pressure washing to break down the stain at a molecular level.
Algae and mildew commonly appear in shaded, damp areas — left untreated, they can make concrete slippery and hazardous.
Sealing concrete after cleaning helps protect it from future staining and extends the time between deep cleanings.



