At present, there are two types of waterproof materials on the market: one is polyurethane waterproof coating. This kind of material is generally made of polyurethane and coal tar as raw materials. The volatilized oil is highly toxic and not easy to remove. Therefore, it was banned in China in 2000. Polyurethane waterproof coatings that are still being sold use asphalt instead of coal tar as a raw material.
However, when such a coating is used, it is generally diluted with an organic solvent such as toluene or xylene, and thus contains toxicity; the other is a polymer cement-based waterproof coating. It is composed of a variety of water-based polymer emulsions and high-quality cement with various additives. The flexibility of the polymer (resin) and the rigidity of the cement make it excellent in impermeability and stability. Its advantages are convenient construction, low comprehensive cost, short construction period, and non-toxic and environmental protection. Therefore, polymer cement base has become the protagonist of the waterproof coating market.
Industry insiders reminded that some decoration companies and consumers mistakenly believe that the indoor decoration waterproof treatment area is not very large, and there are cement and ceramic tiles on the surface after treatment, which is not easy to cause pollution. In fact, because the indoor waterproof layer generally has to reach a certain thickness before it can have the corresponding waterproof function, the use of the material is relatively large. Once the waterproof coating containing the pollutants is used in the waterproof construction, the indoor environment pollution will be caused for a long time.
During the decoration process, as long as it is a place where the water environment is frequently present, such as kitchens and bathrooms, it should be waterproofed. The use of waterproof coatings is not only related to the overall effect of residential decoration, but also closely related to the health of the residents. Waterproof treatment is the "concealed project" in the decoration, and its effect will only be presented after a long period of use. If the waterproof coating contains toxicity, it will become an invisible killer in the home.
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