Deep clean and reseal exposed aggregate surfaces to bring back the stone-like finish.
Exposed aggregate holds up well structurally, but the sealer that gives it that rich, wet-stone look wears off years before the concrete itself does. Once that happens, the surface looks dull, dry, and porous.
Exposed aggregate is more porous than smooth concrete, so it needs sealing more consistently — otherwise water gets between the stones and accelerates freeze-thaw damage from the inside out.
A sodium hypochlorite wash breaks down algae, dirt, and organic growth, then the surface gets a full pressure wash.
An eco-friendly acid etch opens the surface so sealer absorbs evenly between the stones, followed by a neutralizing rinse and a full day to dry.
Surrounding areas get taped off, then a drill-mixed high-gloss sealer with a non-slip additive locks out water and brings the stone colour back.
Walk time: 2–3 hours. Drive time: 24 hours. Final results can vary with the existing condition of the concrete, past sealers, and staining.
A recent exposed-aggregate driveway in London — cleaned, etched, neutralized, and finished with a high-gloss seal that pulls the stone colour back out.
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