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Anonymous users2024-01-24This is due to the oxidation of the chemical components in the tiles, and it may also be due to the depowdering caused by the caulking material during tile mounting.
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Anonymous users2024-01-23Everyone says that it is a return to alkali, but in fact there is a problem with the waterproof layer, what is the room on the other side of the wall, or the outer wall, the white is the fungus generated by mildew, which affects health, or deal with it as soon as possible.
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Anonymous users2024-01-22The main thing is that the ground is damp, and this phenomenon can be eliminated by paying attention to ventilation in the house.
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Anonymous users2024-01-21Clean off the original grout, dry it sufficiently, and apply it again.
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