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    Home > Coatings News > Paints and Coatings Market > Common knowledge of coating: comparison between cement based waterproof coating and polyurethane waterproof coating

    Common knowledge of coating: comparison between cement based waterproof coating and polyurethane waterproof coating

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tips: 1

    Compared with environmental protection and construction performance, waterproof coating is water-based waterproof material, polyurethane is oil-based waterproof material

    Water based coatings have obvious advantages

    First of all, the oil-based coating generally contains toxic and peculiar smell volatile substances

    At the same time, the viscosity is large and the workability is poor, so it is difficult to construct

    Secondly, the solubility of oil and water is poor

    Therefore, the requirements for the dry humidity of the construction base surface are similar to that of coil products

    The water-based materials are superior to the oil-based materials in the above aspects

    2

    Compared with the anti-aging properties of the material, polyurethane is afraid of ultraviolet light, so it can only be used for waterproof of concealed works, while cement based waterproof coating is large

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    Compared with environmental protection and construction performance, waterproof coating is water-based waterproof material, polyurethane is oil-based waterproof material

    Water based coatings have obvious advantages

    First of all, the oil-based coating generally contains toxic and peculiar smell volatile substances

    At the same time, the viscosity is large and the workability is poor, so it is difficult to construct

    Secondly, the solubility of oil and water is poor

    Therefore, the requirements for the dry humidity of the construction base surface are similar to that of coil products

    The water-based materials are superior to the oil-based materials in the above aspects

    2

    Compared with the anti-aging properties of the material, polyurethane is afraid of ultraviolet light, so it can only be used for waterproof of concealed works, while the cement based waterproof coating is mostly made of inorganic sealant and acrylic emulsion, so the anti-aging property is excellent

    3

    Compared with the price, polyurethane waterproof material requires a thickness of 1.5-2.0mm, a material consumption of at least 2.5-3.0kg per square meter, a large amount of material and a high labor cost, while cement-based waterproof material according to the national standard requires 1.0-1.2mm, a small amount and a low cost

    4

    From the comparison of construction safety, the oil polyurethane construction in the closed environment will not only cause poisoning to the construction personnel, but also cause explosion

    However, as a water-based cement-based waterproof coating, it has no such disadvantages, so it can be safely used

    5

    Compared with the quality stability, the polyurethane coating is generally synthesized by reaction in the manufacturer

    Its equipment performance, process control, raw materials and many other aspects may cause quality differences, especially in some small manufacturers, whose conditions are simple and the quality of employees is low, so it is difficult to guarantee the quality

    The cement-based coating is a non reactive product, which can only be processed according to the formula in the factory, so the quality stability is absolutely superior to polyurethane coating

    6

    Compared with the external quality of the coating, the surface tensile strength of polyurethane coating is very low, impact resistance, puncture and other properties are very poor, while the cement-based coating is generally divided into two types, rigid and flexible economic type, with excellent impact resistance

    It is much better than polyurethane coatings in the protection of finished products

    7

    Compared with other materials, polyurethane coating can not directly paint and stick ceramic tiles, while cement-based coating can directly carry out the above construction on its surface

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