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They are quite right, it is not recommended that you use 911, you can use cement-based permeable crystalline waterproof coating, Taishi brand, very easy to use.
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Balcony waterproofing mainly uses environmentally friendly waterproof coatings, which you say is not good; It is recommended to buy waterproof products from well-known brands or go to regular supermarkets to buy them.
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This situation requires cement slurry waterproofing, relying on water volatilization and solidification, Qinglong's RJ208 reflects the curing polymer cement slurry is OK, my neighbor has used it, I heard her say that it is quite satisfied, and the cost performance is better.
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It is not recommended to use 911 polyurethane, which is toxic, and K11 flexible waterproof coating can be used.
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Be sure to use waterproof cement.
Balcony waterproofing belongs to the home decoration waterproof series, which can be recommended to you Qinglong home improvement waterproof coating series water-curing all-effect waterproof coating, polymer JS composite waterproof coating, K11 flexible waterproof slurry, K11 general waterproof slurry.
You can try Xinge JS and 951
It's all the kind that has no taste, and this one of theirs can be directly constructed. >>>More
The balcony is divided into exposed balcony and non-exposed balcony, if the exposed balcony is a large protective layer or tiled, then choose the same material as the bathroom and kitchen, if the waterproof is directly exposed and the person will choose the membrane, if not the person, choose the roof waterproof coating. >>>More
Go to the big market to buy, the bigger the market, the cheaper the building materials, there are tricks in the market, the main road is a little more expensive, so go to a street is waterproof materials. >>>More
It is recommended to buy Zhuozhong, you can check it, they seem to have an official website, and they have a lot of products, you can choose according to your needs.