1. viscosity
The volumetric characteristics of liquid, quasi-liquid or quasi-solid substances against flow, that is, the internal friction or flow resistance between molecules when they flow under the action of external forces. In general, viscosity is directly proportional to hardness.


2. hardness
The ability of a material to locally resist hard objects pressing into its surface is called hardness. Silicone rubber has a Shore hardness range of 0 to 80, which gives designers full freedom to choose the required hardness to best achieve a specific function. Various intermediate hardness values can be achieved by mixing polymer substrates, fillers and auxiliaries in different proportions. Similarly, the time and temperature of heat curing can also change the hardness without destroying other physical characteristics.


3. Tensile strength
Tensile strength refers to the force required on each range unit to cause a sample of rubber material to tear. The tensile strength of hot sulfurized solid silicone rubber ranges from 4.0-12.5MPa. The tensile strength of fluorosilicone rubber ranges from 8.7-12.1MPa. The tensile strength of liquid silicone rubber ranges from 3.6-11.0MPa.