Definition:
Silicone grease is made of silicone oil as base oil and inorganic thickener. It has good waterproof sealing, waterproof, solvent resistance and creepage resistance. It does not corrode metals and has good adaptability with rubber. It is used for waterproof sealing and lubrication of bathroom equipment, sealing rings, and electronic and electrical industries.


Thermal conductive silicone grease
Thermal paste is a paste-like thermal interface material with good thermal conductivity (but mostly non-conductive). It is used at the interface between the heat sink and the heat source (such as chips, inductors). The main function of thermal paste is to fill the pores in the interface, replace the air with low thermal conductivity, reduce thermal resistance, and enhance thermal conductivity.
Because most thermal pastes contain silicon, they are often called silicone grease. The composition of thermal paste is basically a liquid matrix of polymer and a large amount of non-conductive but thermally conductive fillers. Typical matrix materials include silicone resin (mainly), polyurethane, acrylate polymers, etc.; fillers include diamond powder (mainly), aluminum nitride (secondary), aluminum oxide, boron nitride and zinc oxide. The mass fraction of filler is generally 70–80%.
Thermal paste is different from thermal adhesive. Thermal paste has low viscosity and cannot effectively fix the heat sink and heat source. Therefore, a mechanical fixing mechanism is required, and pressure is applied to the interface to allow the thermal paste to fully fill the part where the heat source and the heat sink cannot effectively contact.


Performance characteristics
Excellent thermal conductivity and stability in use, good resistance to high and low temperatures
Water-resistant, non-curing, no corrosion to contacting metal materials (copper, aluminum, steel)
Very low volatile loss, no drying, no melting, good material adaptability and wide operating temperature range (-50∽+250℃)
Non-toxic, odorless, non-corrosive, stable chemical and physical properties.


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