How do the concrete on the outer wall tiles be removed?
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You can also wipe with a steel ball sticky oxalic acid. Sassafras are good to rinse oxalic acid with water. (Note: oxalic acid is corrosive, with the time must be allocated a good proportion, pay attention to personal protection).
Optional cement mortar cleaning agent. Depending on the dirty situation can be diluted 1-5 times.
How to use: Spray the sand on the mortar contaminated area, wait a moment to scrub directly. The disadvantage is the sand of the Department of chemical products, should be in the same place with a small enemy sand enemy, confirmed and then used a large area. Should try to avoid with stainless steel, plating, coated glass and other surface contact, if the pollution should be washed as soon as possible with water rinse residual liquid.
External wall tiles (rugged) on the cement cleaning method is as follows:
With a direct shovel. Shovel when wiping the water with a cloth to wet the cement. With the wood shovel to make a little effort is also nothing, pay attention with the shovel with the clean up. (For a small area of ??external walls of tiles rugged clean)
You can use 1500 or 2000 water sand paper gently rub. You can also use dilute hydrochloric acid to wipe, wipe clean and then clean with water. (Hydrochloric acid corrosion should pay attention to personal protection)
