You can buy an Acid concrete cleaner from the DIY store for this job!
Hi Ron, hp[e these help you out,
This link uses hydrogen peroxide and ammonia and gives you step-by-step directions:
Power washer and a little driveway cleaner sold in home stores will do the trick. I suggest wetting first put on cleaner and wait few minutes then use a stiff brush and power wash. It should come out good as new. Take it a step further and trim branches that hang over concrete if possible.
This should help you:
This may be helpful:
Hi Ron, hope this video helps you remove stains from your driveway and patio.
You all right so here is the patio as you can see all those tannin stains are gone that has set forMore
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