What is the price of polyurethane waterproof coati

2022-07-22
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Polyurethane waterproof coating is a new product in the coating industry in recent years. It overcomes the shortcomings of two-component polyurethane waterproof coating that needs to be prepared on site before use, and uneven preparation will cause performance degradation. It has become a new favorite in the waterproof coating market. What are the advantages and disadvantages of polyurethane waterproof coating? What are the special requirements for construction? What is the price of polyurethane waterproof coating? Let's have a look

what is polyurethane waterproof coating

polyurethane waterproof coating is a one component polyurethane waterproof coating prepared by addition polymerization of isocyanate, polyether and other prepolymers containing isocyanate group, together with catalysts, anhydrous additives, anhydrous fillers, solvents and other processes such as mixing

classification of polyurethane waterproof coatings

polyurethane waterproof coatings can be divided into single component and two component

one component polyurethane waterproof coating, also known as moisture curing polyurethane waterproof coating, is a reactive moisture curing film-forming waterproof coating. When in use, it is coated on the waterproof base and cured and crosslinked into a tough, soft and seamless rubber waterproof film by reacting with moisture in the air

high strength polyurethane waterproof coating is a two-component reaction curing waterproof coating. High strength polyurethane waterproof coating is a two-component chemical reaction cured isocyanate terminated prepolymer obtained by polycondensation of polyether and isocyanate. Component B is a colored liquid composed of plasticizer, curing agent, thickener, accelerator and filler. When in use, the two components of a and B are mixed evenly in proportion, painted on the surface of the waterproof base course, and often thermally crosslinked and solidified to form a rubber elastic film with high elasticity, high strength and durability, so as to play a waterproof role

while waterborne polyurethane waterproof coating generally refers to one component polyurethane waterproof coating, oily refers to two-component polyurethane waterproof coating; Comparatively speaking, the water-based performance is poor, and the price is cheaper. The most important thing depends on the use environment! But waterborne polyurethane waterproof coating is more environmentally friendly. Each has its own advantages. Just like fruits, they have different effects and requirements

characteristics of polyurethane waterproof coating

(1) it can be directly applied on various wet or dry base surfaces

(2) it has strong adhesion with the base surface, and the polymer material in the film can penetrate into the fine cracks of the base surface, with strong follow-up

(3) the film has good flexibility, strong adaptability to the expansion or cracking of the base, and high tensile strength

(4) green environmental protection, non-toxic and tasteless, no pollution to the environment, no harm to people

(5) good weather resistance, no flow at high temperature, no cracking at low temperature, excellent anti-aging performance, oil resistance, wear resistance, ozone resistance, acid and alkali corrosion resistance

(6) the film is dense, the waterproof layer is complete, no cracks, no pinholes, no bubbles, and the water vapor permeability coefficient is small, which has both waterproof and gas barrier functions

(7) simple construction, short construction period and convenient maintenance

(8) various colors can be mixed as needed

(9) it is light and does not increase the load of the building

construction process of polyurethane waterproof coating

1 Clean the base course: use a shovel to remove the dust stuck on the leveling layer, and use a broom to clean the dust, especially the pipe root, floor drain and drain outlet. If there is oil stain, it should be brushed off with steel wire brush and sandpaper or painted on the oil stain surface with intermediate paint and cement. The surface must be flat, and the depression shall be leveled with 1:3 cement mortar

2. Brush the primer: mix the polyurethane A and B and xylene in the ratio of 1:1.5:2 (weight ratio), and then use it. Use a rolling brush or paint brush to dip the primer evenly on the surface of the base course, which shall not be too thin or too thick. The brushing amount is about 0.2kg/m. After painting, it should be dried for more than 4H before the operation of the next process

3. Additional layer of details: mix and stir the polyurethane coating waterproof material according to the proportion of component A: component B =1:1.5, and apply it evenly with a paint brush dipped in the paint on the floor drain, pipe root, internal and external corners, water outlet and other weak parts that are prone to water leakage, without omission (at the junction of the ground and the wall, the coating waterproof corner is made 100mm high on the wall)

4. The first layer of coating: mix the polyurethane A and B components with xylene in the ratio of 1:1.5:0.2 (weight ratio), pour it into the mixing bucket, mix it evenly with an electric mixer (about 5min), scrape a layer of coating with a rubber scraper or paint brush, the thickness should be uniform, the scraping amount should be 0.8 ~ 1.0kg/m, and retreat from the inside to the outside

5. The second coating: after the first coating, when the coating is cured to non stick, the second coating operation shall be carried out according to the material ratio method of the first coating. In order to make the coating thickness uniform, the scraping direction must be perpendicular to the scraping direction of the first coating, and the scraping amount is the same as that of the first coating

6. The third layer of coating: after the second layer of coating is cured, the coating material is still stirred according to the material ratio of the first two times, and the third time of scraping is carried out. The scraping amount is appropriate to be 0.4 ~ 0.5kg/m. When it is not cured after coating, clean &phi can be thinly scattered on the surface of the coating; 2~φ 3mm stone slag to increase the bonding force with the cement mortar covering layer

price of polyurethane waterproof coating

the sales price of polyurethane waterproof coating in the national standard is 12500 yuan/ton, 20 kg per barrel, so the price of polyurethane waterproof coating per barrel is about 250 yuan per square meter. According to the specification, 2.5 kg of paint is used, so the material price per square meter is 31.25. If you do it yourself, basically 2 kg is enough, so you don't have to do it so well. If you let others contract labor and materials, it should be appropriate for them to charge you 45 yuan. If you only make a bathroom, I don't think someone will do it for you for 60 yuan per square meter. Now the prices in the market vary. The minimum price that reaches the national standard is about 11000, and the non-standard price is about 6000

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