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By Bob from Copake, NY
By
07/06/2010
Have you tried oxi-clean it is non toxic and works wonders. Spray it on let sit till almost dry use a deck brush and rinse with water.
How do you remove tree sap from a concrete patio? It's older rough concrete. I've used bleach, Comet, and concrete cleaner. Nothing works. I've scrubbed until my back ached.
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