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Similarly, it can also be used to make porous concrete and plaster quite waterproof. Again, apply a thin coat on the surface that will bind to the concrete and seal it, not allowing water or other liquids to permeate through it. Deflocculant - You will be surprised to know that sodium silicate is also a commonly used deflocculant for clay. A major issue with clay slips is that they contain a lot of water which causes the slip to shrink as it dries. This item is used to thin the clay - it works by dispersing the particles which greatly reduces its viscosity.However, you need to mix the clay, water and water glass in a precise ratio with the latter never exceeding.5% of the entire formulation. This is essential due to the fact that after this point water glass starts having a starkly opposite effect on the clay mixture. Excess water glass will paradoxically make the clay thicker or inoculate it!
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