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The main ingredient of glass glue is silicate colloid, which is not toxic.
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Yes, open the windows more often to allow ventilation.
Because the surface of the ceramic sanitary ware is covered with a dense glaze, the affinity between the acid silicone glass glue and the glaze is extremely poor, so it cannot be used.
It's okay. As long as it doesn't move, it's fine, the glass glue under the toilet bowl is mainly the role of decorative gaps, and the sealing is by the sealing flange of the toilet. It has nothing to do with glass glue.
It's definitely toxic, but open the windows often to ventilate, and it doesn't matter after a while!
Generally, it takes at least 8 hours to sit, and you have to be careful when sitting, so long the surface of the glass glue can be dry, but it is best to wait 48 hours to dry thoroughly, so that the glass glue can exert the maximum adhesive ability.