The importance of waterproofing in home life is no doubt that if you want a good waterproof effect, picking the waterproof coating is the key first step. However, there are many kinds of waterproof coatings on the market, and similar professional terms such as “polymer”, “one-component”, “water-based”, and “acrylate” make many consumers feel dizzy. How to choose waterproof coating?

Waterproof coatings are divided into four categories:

1, hard mortar, also known as rigid mortar, emulsion and mortar ratio of 1:4, after the brush does not need to deal with the coating, can be directly tile, more convenient. After the solidified cement blocks are formed, they will not bubbling and seepage. The biggest advantage is that the waterproof effect of the back surface is very good. The disadvantage of this type of coating is that such a mortar has a high hardness and is easily cracked with the deformation of the base layer, and is therefore generally used for waterproofing the back surface.

2. Flexible mortar: The ratio of emulsion to mortar is 5:4, and it has elasticity. Even if the base layer deforms or cracks, it will not affect the waterproof effect. It is mostly used for water surface such as wall surface and ground surface. It cannot be used for the back surface of the top surface. If waterproof is not done well, there is water penetration and it is easy to bubbling and seepage. There is also a type of silicone-based waterproof coating in flexible mortar, which belongs to high-grade flexible mortar. The elasticity and flexibility of the shell are very good, but the price is relatively expensive and it is rare in the market.

3, acrylate: pure liquid, open and use it. Water-based, can be melted in water, it is easy to combine with the gap in the ground to form a strong waterproof layer, waterproof effect is better than flexible mortar. After brushing, it is necessary to perform surface treatment such as pulling or lifting sand in order to increase the friction and make it easier to tiling. Due to its excellent waterproofing effect, flexible mortars and acrylates are more suitable for long-term flooding.

4. One-component polyurethane: It is used both indoors and outdoors. The coating is very thick, about 3mm, and the elastic tension is more than 300%. Cracking of any substrate will not cause it to crack. The waterproof effect is best. Although the safety performance is controlled within the requirements of environmental protection, the smell of such waterproof coatings is relatively large, and it is difficult for most people to accept, and the environmental performance of very few brands is not up to the standard. Polyurethanes are gel-like and very thick. They require the use of scrapers, which are laborious and complicated. After brushing the paint, surface treatment (pulling or sanding) is required to increase the friction and it is easy to tiling. The drying speed of these paints is affected by the climate, and the drying speed is slower in a cool climate, but the climate has no effect on the waterproof effect. In general, the mortar drying cycle is 24 hours, and the acrylic and polyurethane drying cycles are 24-48 hours.

Treatment of the grass before brushing: The coating of the waterproof coating is closely related to the ground conditions. The more uneven the base, the more paint is used. Therefore, before applying the waterproof coating, it is better to simply treat the base layer and flatten the base layer as much as possible. Secondly, it should be ensured that the ground is dust-free, soilless, and oil-free, and can be carefully mopped with mop cloth to remove all dust, otherwise it will cause cracking and peeling of the waterproof coating, which will affect the waterproof effect.