1. Water resistance: It means that its performance is basically unchanged under the action of water and after being infiltrated by water. It is impervious to water under the action of pressure water, and is usually expressed by indicators such as impermeability and water absorption.

2. Temperature stability: refers to the performance of not flowing, non-foaming, non-slip at high temperature, not brittle at low temperature, that is, the ability to maintain the original performance under certain temperature changes. It is commonly used for indicators such as heat resistance and heat resistance.

3. Mechanical strength, elongation and fracture resistance: refers to the performance of waterproofing membranes subjected to certain loads, stresses or failure under certain deformation conditions. Commonly used for tensile strength, tensile strength and elongation at break.

4. Flexibility: refers to the performance of maintaining flexibility under low temperature conditions. It is very important to ensure easy construction and no brittle fracture. Commonly used for flexibility, low temperature bending and other indicators.

5. Atmospheric stability: refers to the ability to resist erosion under the long-term combined effects of sunlight, heat, ozone and other chemical attack media. It is commonly used for indicators such as aging resistance and heat aging retention.