There are various types of silicone oil, which can be classified into the following categories based on their chemical structure and applications:

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1. Classified by chemical structure
Methyl silicone oil: The most commonly used silicone oil with high surface activity and low surface tension, widely used in lubricants, defoamers, and fabric finishing agents.

Ethyl silicone oil: By introducing ethyl groups, certain properties of silicone oil have been improved.

Phenyl silicone oil: It has higher heat resistance and weather resistance, and is suitable as an insulating oil for electronic devices.

Hydrogen containing silicone oil: such as methyl hydrogen containing silicone oil, has good waterproof performance and is commonly used in waterproof treatment and release agents.

Modified silicone oil: By introducing amino and polyether groups, silicone oil is endowed with new properties such as softness, hydrophilicity, and anti-static.


2. Classified by purpose
Damping silicone oil: used for damping devices such as shock absorbers.

Diffusion pump silicone oil: used for vacuum diffusion pumps.

Insulating oil: used for insulation of electronic equipment.

Hydraulic oil: used in hydraulic systems.

Heat transfer oil: used in heat exchange systems.