Paver Cleaning Guide
What Is Efflorescence and How Do You Remove It From Pavers?
That white chalky haze on your driveway or patio isn't mold — it's efflorescence. Here's what causes it, whether it's a problem, and exactly how to remove it without damaging your pavers or concrete.
What Is Efflorescence?
Efflorescence is the white, chalky, or powdery deposit that appears on the surface of concrete, brick, and pavers. It's caused by water moving through the material and carrying soluble salts to the surface. When the water evaporates, the salts are left behind as a white residue.
In Florida's climate — with frequent rain, high humidity, and temperature swings — efflorescence is extremely common. It's especially prevalent on new pavers and concrete (primary efflorescence) and on older surfaces after heavy rain events (secondary efflorescence).
The good news: efflorescence is cosmetic, not structural. It doesn't mean your pavers are failing. The bad news: if left untreated, it can become increasingly difficult to remove and may indicate a drainage or moisture issue worth addressing.
What Causes Efflorescence on Florida Pavers?
New installation (primary efflorescence)
Most common in the first 1–2 years after installation. The curing process releases salts naturally. This type typically fades on its own but can be accelerated with proper cleaning.
Poor drainage or standing water
Water that pools under or around pavers continuously moves salts to the surface. If efflorescence keeps returning, check your drainage grade and base compaction.
High mineral content in irrigation water
Florida's hard water is high in calcium and magnesium. Irrigation systems that spray onto pavers deposit minerals with every cycle.
Seasonal rain events
Heavy summer rains saturate the base material and drive salts upward. Secondary efflorescence after storm season is very common in Volusia and Flagler counties.
How to Remove Efflorescence: The Right Way
Do not use muriatic acid on pavers without professional guidance. Improper acid application etches the surface, strips sealant, and can permanently damage the paver finish.
Dry brush first
For light, powdery efflorescence, a stiff-bristle brush on a dry surface removes a surprising amount. Always start dry — water can temporarily dissolve and redistribute the salts.
Apply an efflorescence cleaner
Purpose-formulated efflorescence removers (pH-balanced, non-acid) are the safest option for most pavers. Apply per manufacturer instructions, allow dwell time, then scrub.
Low-pressure rinse
Rinse thoroughly with low-to-medium pressure water. High pressure can drive salts deeper into the paver or damage the joint sand. 500–1,200 PSI is appropriate for most paver surfaces.
Allow to dry completely
Pavers must be fully dry before any sealing. Sealing over moisture traps it inside and causes the white haze to return — or worse, causes the sealer to cloud.
Apply a penetrating sealer
A quality penetrating sealer reduces future water infiltration and makes the surface easier to clean. It won't prevent efflorescence entirely but significantly slows recurrence.
Frequently Asked Questions About Efflorescence
Dealing With White Deposits on Your Pavers?
We treat efflorescence as part of our paver cleaning service — not an upcharge. Get a free estimate for your driveway or patio.