I have another question for you regarding a driveway we just cleaned. We found acorn stains everywhere that did not come up during today's cleaning, and these were not present when I initially did the proposal. We were scheduled to seal the concrete tomorrow, but I am reconsidering the timing. Given the situation, what do you recommend? Should we move forward with sealing tomorrow and then apply the gray out to the stains later? Or would it be better to wait until the tree is done dropping, apply the Gray out, and then perform a final clean before sealing? Any input you have is appreciated.

Question

I have another question for you regarding a driveway we just cleaned. We found acorn stains everywhere that did not come up during today's cleaning, and these were not present when I initially did the proposal. We were scheduled to seal the concrete tomorrow, but I am reconsidering the timing. Given the situation, what do you recommend? Should we move forward with sealing tomorrow and then apply the gray out to the stains later? Or would it be better to wait until the tree is done dropping, apply the Gray out, and then perform a final clean before sealing? Any input you have is appreciated.

Status: Open Sep 10, 2026 - 01:34 PM

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Staff Answer

Sep 10, 2026 - 01:34 PM

I recommend applying Gray-Out to the stains now, before sealing. Once the tree has finished dropping acorns, we can perform a final cleaning and then seal the concrete. Future acorn stains may still occur, but the sealer will help prevent the tannins from penetrating deeply into the concrete. Because these are organic stains, Gray-Out should be able to remove them more quickly after the surface is sealed.

If we seal the concrete before treating the stains, they should eventually fade because they are organic, but that process may take some time.

Gray-Out also cleans organic stains.

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