|I have slabs of red flagstone that line my patio. How would I clean that in order to get the 'red' color to become vibrant again?
|Answer from NGA
June 12, 2009
|The best approach is to power wash the flagstone (or scrub it down with soapy water and a scrub brush), then allow to dry and apply a concrete sealer. You can brush or roll this on. It will darken the color of the flagstone and give it a sheen. You can reapply every 2-3 years. Good luck with your project!
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