In terms of waterproof performance, cement mortar
1. environmental protection one-component polyurethane.
Polyurethane waterproof coating is a one-component environment-friendly liquid building waterproof coating based on imported polyurethane prepolymer and without additives such as tar and asphalt. Curing after contact with moisture in the air, forming a firm and tough seamless integral waterproof film on the surface of the base.
It can be directly constructed on various wet or dry foundations. Strong adhesion to the base surface, high molecular substances in the coating film can penetrate into the fine cracks on the base surface, and the follow-up performance is strong. The coating has good flexibility, strong adaptability to base expansion or cracking, and high tensile strength. The waterproof effect is the best, but the price is also higher, the cost is higher, the drying and curing are slow, and it is rarely used in decoration companies! There must be professional construction!
Construction requirements
1. The base surface shall be smooth, clean and free from sand and looseness.
2. During construction, the base surface shall be checked and accepted to ensure that it meets the requirements, and a layer of primer shall be applied first, and the primer must be uniform.
3. After the primer is cured, it should be painted for the second time, and the painting direction must be perpendicular to the previous time to prevent leakage and scratching, and it should be painted for three to five times in turn.
4. After completion, before the waterproof layer is cured, no one can get the next working procedure here, so as not to damage the waterproof layer.
Two. Acrylate waterproof coating
Acrylate waterproof material is made of pure acrylate polymer or pure propionate emulsion as raw materials, and a proper amount of high-quality fillers and additives are added, which belongs to one-component waterproof coating of synthetic resin. It is a water-soluble coating that can be diluted with water. After conjunctiva, it has great elasticity and ductility, remarkable waterproof effect and moderate price. It is the first choice for home decoration, but it is only used by some large decoration companies. In contrast, it is still high!
(1) has excellent weather resistance, heat resistance and ultraviolet resistance. Its performance is basically unchanged in the range of -30℃ to 80℃, and its ductility is good, which can adapt to the cracking and deformation of the base surface to a certain extent.
(2) Various colors can be blended as required, and the waterproof layer has both decorative and thermal insulation effects.
(3) Environmental protection, non-toxic, tasteless, no environmental pollution and no harm to human body.
(4) Simple construction, short construction period and convenient maintenance.
(5) It can be constructed on wet base surface and has certain air permeability.
3.JS composite waterproof material
JS compliant waterproof material is a new waterproof material developed after absorbing foreign advanced technology. It is a waterproof coating composed of organic liquid and inorganic powder, which has the advantages of high elasticity of organic materials and good durability of inorganic materials.
(1) can be directly used for construction on wet or dry base surfaces of various materials.
(2) The coating is tough and has excellent water resistance, weather resistance and durability.
(3) Non-toxic, harmless, pollution-free, simple in construction and short in construction period.
(4) It does not crack at low temperature and does not flow at high temperature, which is especially suitable for road and bridge waterproofing.
(5) -35℃ to 140℃ and can be firmly bonded with cement mortar and other materials.
Four. cement mortar
Low price, convenient construction and good waterproof effect are widely used by the majority of owners and decoration companies!
Mortar waterproof coating is a two-component water-based waterproof mortar, which consists of organic emulsion composed of acrylate emulsion and various additives, and inorganic powder composed of special cement and various fillers in a certain proportion. This kind of paint is non-toxic, harmless and pollution-free, and it is a real environmental protection paint. It can be directly coated on the concrete surface, with firm bonding, convenient construction, fast drying and short setting time, and the ceramic tile can be pasted on the surface after 2 hours of construction. However, because this kind of material belongs to rigid waterproof coating, it lacks elasticity after film formation, which will affect the waterproof effect due to building settlement and dislocation, and is generally suitable for parts with relatively stable structure.
Verb (abbreviation of verb) circle
At present, there are decoration companies in use! Advantages are low price and good waterproof effect!
Most of the waterproof coatings on the market belong to water-soluble materials, and all businesses also claim that water-soluble waterproof coatings are environmentally friendly materials, while most of them say that oil-soluble waterproof coatings are not environmentally friendly. In fact, no matter whether it is water-soluble or oil-soluble waterproof coating, as long as it has passed the relevant national environmental protection certification, such as China's environmental label certification or CTC product environmental protection quality certification, these materials are environmentally friendly and reliable.
The following three aspects should be considered when judging waterproof materials: 1) The coating should be free of precipitation, delamination and caking; 2) No strong pungent smell; 3) Whether the construction is convenient.
In the mid-1990s, China published the national standard GB 5020794, which clearly defined the quality requirements, construction methods and project acceptance of different types of waterproof coatings, and played a positive role in the development of building waterproof coatings. However, there is no mandatory standard for waterproof coatings, and the market is chaotic, which needs further regulation.
Waterproofing is a necessary process in kitchen and bathroom decoration, but there is no limit standard of harmful substances in waterproof coating in the mandatory national standard 10, so management should be further strengthened in home decoration. After home decoration, it was found that the bathroom and kitchen smelled strong. After testing by the testing center, it was found that the pollution was mainly caused by waterproof paint, which was not easy to remove.
At present, there are two kinds of waterproof materials on the market: one is polyurethane waterproof coating. This material is generally made of polyurethane and coal tar, and its volatile tar gas is toxic and difficult to remove, so it was banned in China in 2000. At present, the polyurethane waterproof coating still on sale uses asphalt instead of coal tar as raw material. However, when using this coating, it is usually diluted with organic solvents such as toluene and xylene, which is also toxic. The other is polymer cement-based waterproof coating. It is composed of emulsion synthesized by various water-based polymers and high-quality cement mixed with various additives. The flexibility of polymer (resin) is integrated with the rigidity of cement, which makes it have excellent impermeability and stability. Its advantages are convenient construction, low comprehensive cost, short construction period, non-toxicity and environmental protection. Therefore, polymer cement-based has become the protagonist of waterproof coatings market.
Experts remind that some decoration companies and consumers mistakenly think that the waterproof treatment area of indoor decoration is not very large, and there are cement and tiles on it after treatment, which is not easy to cause pollution. Actually, it is not, because the indoor waterproof layer generally needs to reach a certain thickness to have the corresponding waterproof function, so the material consumption is relatively large, and once the waterproof coating containing pollutants is used in waterproof construction, it will cause indoor environmental pollution for a long time.
At present, to control the pollution of indoor decoration waterproof coating, it is mainly to control the materials used, and non-toxic and environmentally friendly waterproof coating should be the first choice. At present, acrylate waterproof coatings and tar-free polyurethane waterproof materials on the market have been proved to be non-toxic and tasteless environmental protection products, and the indoor floor treated with this waterproof coating can meet the requirements of indoor environmental protection. Consumers should choose materials from reputable markets and qualified home improvement enterprises for construction.
In the process of decoration, as long as it is a place where water environment often exists, such as kitchen and bathroom, it should be waterproof. The use of waterproof coating is not only related to the overall effect of residential decoration, but also closely related to the health of residents. Waterproof treatment is a "hidden project" in decoration, and the effect will be presented after a long time of use. If the waterproof coating contains toxicity, it will become an invisible killer at home. Therefore, the choice of waterproof materials can not be ignored.