1. Coating primer: This process is equivalent to the traditional asphalt waterproof construction and coating cold base oil. The purpose is to block the moisture of the base layer and prevent the waterproof coating film from falling off the drum; strengthen the base layer and improve the bonding strength between the coating film and the base layer to prevent The coating has defects such as pinholes. Our company recommends using polyurethane primer as the base layer.
Preparation of polyurethane primer: The polyurethane material and the material are blended in a ratio of 1:2 to 3 (weight ratio) (other coatings are matched according to the specifications of the product specifications). When the material is thicker, it can be diluted with special diluent. It can not be diluted with acid or oily diluent to avoid affecting the quality of the original product. In the preparation, the material should be diluted and stirred for 2-3 minutes. If it is not needed to be diluted, it can be directly dispensed and stirred for 5-10 minutes with the group A and the stirrer is lifted. It is better to see that the uniform liquid slides slowly from the container. At the same time, it should be noted that the opening material should be tightly sealed immediately to avoid coagulation and scrapping. The mixture should be used according to the actual dosage. (Note: When mixing 991 type construction, the material should be poured into the material for stirring, contrary to the 911 and 851 types)
2. Local reinforcement: For expansion joints, control joints, yin and yang corners, pipe joints, etc., it can be reinforced by a layer of reinforced cloth, and then solidified after the whole.
3. The first coating construction: After the primer is basically dried and solidified, a layer of paint is evenly coated with a plastic or rubber scraper. The coating is required to be uniform and uniform, not too thick or too thin, and the thickness of the coating is generally 0.8. About mm is appropriate. When starting to scrape, the construction retreat and painting sequence should be considered in accordance with the size, shape and materials of the construction area.
4. Second coating application: After the first coating is substantially cured, the second coating is applied to the surface of the coating, and the coating method is the same as the first coating. In order to ensure the quality of the waterproof project, the direction of the coating must be perpendicular to the direction of the first layer. The interval of recoating time is determined by the temperature at the time of construction and the degree of curing of the film (not sticky by hand).
5. After the second pass of the film is cured, the film is applied a third time by the above method.
6. Laying the protective layer or facing material: When the third coating film is completed and not fully cured, a small amount of clean sand (diameter not more than 2mm) may be sprinkled on the surface to increase the coating layer and will The bonding ability between the covered cement mortars. When the coating film is completely cured and the inspection is accepted, the cement mortar protective layer or the paste brick, mosaic and other finish layers can be applied.
7. Construction process of two cloths and three coats: There are not many such processes in the market. The operation method of this process is: according to the above description, the treatment of the base layer and the like is the same, after the first pass of the painting, The glass wire mesh cloth is evenly laid on the top, and it is adhered to it by the adhesive force of the polyurethane. After the first pass, the second method is carried out in the same way. After all the drying, finally, the polyurethane waterproofing is applied according to the above requirements. coating. The construction methods of the bathroom, kitchen and roof are the same. It should be noted that the glass wire mesh is required to be flat when laying, and since the space of the bathroom is relatively small, it should be pre-processed when the mesh cloth is laid. Other requirements are consistent with the traditional construction process requirements of polyurethane.
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