Things You'll Need:
- 3500+psi pressure washer
- Dish soap
- Broom
- Muriatic Acid
- Ammonia
- Water
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Step 1
Start by pressure washing. Keep the tip close enough to remove and penetrate into the concrete. Do not keep it too close as to remove the concrete finish. Any thing on the surface should blow off with the pressure.
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Step 2
Measure 1/2 gallon of muriatic acid and pure into a five gallon bucket. Carefully fill the bucket with water. Use rubber gloves and eye protection for precaution. This is a 10:1 mix. Use the same ratio if larger or smaller mixes are needed.
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Step 3
Use a broom to spread and scrub concrete with the acid mix. Initially, the acid will cause the concrete to fizz. Let it sit for 10 minutes. If there are any stains, use a more concentrated mix. Don't let the area sit for it will discolor. Wash it all off with a hose.
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Step 4
Pour 1 gallon of ammonia into a five gallon bucket. Fill the rest with water. With a broom, pour and spread the ammonia mix over the entire deck. Let it sit for 10 minutes and rinse with a hose.
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Step 5
Finally, scrub the concrete walkway with some soap water and a broom. Use plenty of soap in order to penetrate into the crevasses. After it dries, it is recommended to seal the walkway. Sealing should take place only when the deck is clean and dry.











