"General Atlas of Building Structures" (Underground Engineering Waterproofing -88J6) has the practice of three cloths and four coats of FRP waterproofing.

1. Add water (electricity) to the cement-based waterproof material in the order of "water first, then material" and stir for 10 minute.

2. Pressure plastering method: the powder is stirred into putty-like consistency, and it is scraped on the waterproof surface with a rubber trowel. (This construction method is mainly used in corners, drains and other key parts).

3. Brushing method: Stir the powder into paste and brush it on the waterproof surface with a paint brush. (This construction method mainly cooperates with the construction of "one cloth with two coats or two cloths with three coats", and is generally used in roofs, corners and other places).

4. Precautions for two coats and three coats: firstly, brush the material evenly on the surface by brushing, and immediately spread a layer of non-woven fabric (about six meshes is appropriate). Brush a layer of material on it after drying, and immediately spread a second layer of non-woven fabric; After drying, brush the material on it for the third time-this is called "two cloths and three coats". If the requirements are not high or the foundation is good, you can only use "one cloth and two coats".

5. After mixing the material with water, it should be used up within three hours.