Waterproof coatings are favored by experts who distinguish quality
Waterproof coatings are favored in many fields because of their excellent protective properties. There are many types of waterproof coatings in the market, such as two-component polymer waterproof coatings and one-component polyurethane waterproof coatings. However, how to choose high-quality waterproof coatings is believed to be a problem for many consumers. In fact, according to the nature of the points, the market in the sale of waterproof paint can be divided into four types, their performance is different, but also have their own advantages and disadvantages.
Dulux ( Western Chemicals )
Hard mortar: waterproof effect on the back surface of the coating
Hard mortar, also known as rigid mortar: The ratio of emulsion to mortar is 1:4. It is not necessary to process the coating after brushing, and it can be directly tiled, which is more convenient. After curing, it forms a cement block and does not cause water seepage. Its back surface has good waterproof effect and is its biggest advantage. The disadvantage is that this kind of mortar has high hardness and is easy to crack with the deformation of the base layer, so it is generally used for waterproofing the back surface. Price: 200-300 yuan / barrel, a bucket of 18 kg, brush 10-13 square meters.
Flexible mortar: Cracking does not affect the waterproof effect
Flexible mortar: The ratio of emulsion to mortar is 5:4, and it has elasticity. Even if the base layer deforms and cracks, it will not affect the waterproof effect. It is mostly used on the surface of water, such as wall surface and ground surface, but it cannot be used on the back surface of the top surface. If waterproof is not done well, there is water penetration and it is easy to make water seepage. Price: 300-500 yuan / barrel, a bucket of 18 kg. There is also a type of silicone-based waterproof coating in flexible mortar, which belongs to high-grade flexible mortar. The elastic tension and flexibility are good, but the price is 600 yuan/barrel, which is relatively expensive and very rare on the market.
Acrylate: Long-term soaking does not affect function
Acrylates: pure liquids, ready to use. Water-based, can be melted in water, it is easy to combine with the ground gap 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 sanding 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 immersion in water. Price: 300-500 yuan / barrel, a bucket of 18 kg.
One-component polyurethane: flexible indoor and outdoor use
One-component polyurethane: It can be used both indoors and outdoors. The brush is very thick, about 3mm, and the elastic tension is more than 300%. It is very elastic. The cracking of any substrate will not make it crack. The waterproof effect is the best. Although the safety performance control is among the environmental protection requirements, the odor of such a waterproof coating 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 colloidal and are very thick. The use of scrapers during construction is laborious and complicated. After brushing the paint, it is necessary to perform surface treatment, pull the hair or lift sand to increase the friction, and easy to tiling. Price: 500 yuan / barrel, a bucket of 18 kg.
Waterproof coating knowledge: different in nature and different
In waterproof coatings, the difference between "one-component" and "two-component" is that the mortars are all two-component polymers, that is, the emulsion and the mortar are mixed; the acrylate and the polyurethane are not mixed with the mortar. Single component.
In addition, the drying speed of these paints is affected by the weather, and the drying speed is slower in a cool-climate climate, but the climate has no effect on the waterproof effect. In general, mortars have a drying cycle of 24 hours and acrylics and polyurethanes have a drying cycle of 24-48 hours.
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