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[exodusofficer]

I manage some concrete ponds that have quite a few patches on them of different types that have built up over the years. We're getting ready to clean them out and my boss wants me to pressure wash everything. Is there much danger of the pressure washing damaging the patches and ecposing the cracks again?

[D&RW]

I don't specifically know the answer to your question. But, when you're ready to seal everything again, assuming you plan to have fish in it, then a product that has been determined to be safe for fish is White Mountain Wet Look Lacquer. Seals the cement from leaching into your water.