What are the following properties that waterproof coatings must possess?

Waterproof coatings must have the following properties:
(1) Solid content
Refers to the proportion of solids contained in waterproof coatings. Due to the formation of a coating film by the solid components of the paint after application, the solid content is closely related to the thickness of the film and the quality of the coating film.
(2) Heat resistance
The performance of the waterproof film formed by the waterproof coating that does not soften, deform, or flow at high temperatures. It reflects the high temperature resistance of waterproof coating.
(3) Flexible
The film layer of waterproof coating maintains its flexibility at low temperatures. It reflects the construction and usage performance of waterproof coatings at low temperatures.
(4) Impermeability
The performance of waterproof coating that does not leak under a certain water pressure (static or dynamic water pressure) and for a certain period of time; It is the main quality indicator for waterproof coatings to meet the requirements of waterproof function.
(5) Extensibility
The ability of waterproof coating to adapt to substrate deformation. After the waterproof coating is formed, it must have a certain degree of extensibility to adapt to the deformation of the base caused by factors such as temperature difference, dryness and wetness, and ensure the waterproof effect.