1.Lubricating Properties

O - rings and other gaskets will generate friction with the sealing surface during installation and use. The lubricity of silicone grease can effectively reduce this friction. When an O - ring is installed into a sealing groove, the silicone grease enables the O - ring to slide more easily into the appropriate position, avoiding surface damage to the O - ring caused by excessive friction.

O - rings made of certain materials (such as rubber) may seize or adhere to the sealing surface in specific environments. Silicone grease can form a separation film between the O - ring and the sealing surface to prevent this from happening.

2.Enhancement of Sealing Performance

Even if the sealing surface is precisely machined, there are still microscopic irregularities and gaps on its surface. Silicone grease can fill these tiny gaps and form a more complete seal together with the O - ring. The O - ring mainly acts as the main barrier to block fluids, while the silicone grease can enter the microscopic voids between the O - ring and the sealing surface, just like filling the small holes of a stone wall with fine sand, preventing fluids from leaking through these tiny channels.For example, in the sealing application in a hydraulic system, the high - pressure hydraulic oil needs to be strictly sealed. The silicone grease fills the microscopic gaps around the O - ring, improving the overall sealing effect and ensuring that the hydraulic oil does not leak and the system pressure remains stable.

Silicone grease can help the O - ring better adapt to different sealing conditions. When the sealing surface has a slight deformation (such as deformation caused by pressure or temperature changes), the silicone grease can deform together with the O - ring and still maintain the sealing effect.For example, in the cooling system of a car engine, the temperature change range is relatively large. When the temperature rises, the sealing components will expand, and the silicone grease can flow with the expansion of the O - ring, filling the new microscopic gaps generated by the expansion; when the temperature drops, the silicone grease will not leave the sealing position, but continue to play a sealing role, ensuring that the coolant in the cooling system does not leak.

3.Chemical Stability and Compatibility

Silicone grease has good chemical stability and can resist the erosion of many chemical substances. In various industrial environments, O - rings may come into contact with different chemical fluids, such as acids, alkalis, organic solvents, etc. Silicone grease can protect the O - ring from the corrosion of these chemical substances to a certain extent, maintaining its physical properties and sealing performance.

Silicone grease has good compatibility with a variety of materials, including common O - ring materials such as rubber and plastic, as well as the materials of the sealing surface such as metal. It will not react chemically with these materials, resulting in a decline or damage to the material performance.