How to Clean Efflorescence on a Paver

Paver patios provide an ideal place for outdoor relaxation.

The powdery, scummy haze that appears on pavers is disappointing to homeowners, tarnishing the patio or walkway that likely reflects a heavy investment of time and money. Known as efflorescence, the salty haze blooming across pavers is a calcium carbonate deposit; the result of a chemical reaction between compounds in the pavers and the ground on which they lay. Although efflorescence will naturally dissipate over time, special cleaning methods can be employed to restore pavers to their original beauty.

Things You'll Need

• Dishwashing liquid
• Bucket
• Nylon brush
• Garden hose
• Concrete cleaner
• Stainless steel wire brush
• Wide nylon broom

Instructions

1. Mix two tablespoons of dishwashing liquid in a bucket with two gallons of warm water. Pour the solution over the surface of the pavers and scrub with a stiff bristled nylon brush, concentrating on greasy or oily areas. Rinse clean with a garden hose. Allow the pavers to dry for two days before proceeding.

2. Mix concrete cleaner in a bucket at the dilution rate recommended by the manufacturer. Pour the solution over the pavers and scrub using a stainless steel wire brush to remove efflorescence.

3. Allow the solution to dry completely on the surface of the pavers; this can take a day or more. Sweep clean with a wide nylon bristled broom.

Tips & Warnings

• Wear gloves and goggles when working with cleaners.

References

• Paving Expert: Efflorescence: Whats that White Stuff on My Paving?
• RadonSeal Efflorescence Cleaner:Concrete Cleaner Application