High thermal conductivity sealing silicone - Thermal conductivity 1.5- Heat dissipation silicone is what material

What material is thermal silicone

Heat dissipation silica gel is a kind of heat conduction medium material, silica gel as the base material, adding various auxiliary materials such as metal oxides, and a kind of heat conduction medium material synthesized by special process. It is specially produced for the design scheme of using the gap to transfer heat, which can fill the gap, open the hot channel between the heating part and the heat dissipation part, effectively improve the heat transfer efficiency, and also play the role of insulation, shock absorption, sealing, etc., which can meet the design requirements of miniaturization and ultra-thin equipment.

Silica gel is an amorphous solid with good elasticity, insulation and thermal conductivity. The filler can be a material with good thermal conductivity, such as metal powder, ceramic particles, etc., used to increase the thermal conductivity of heat dissipating silica gel.

The main feature of thermal silicone is that it has good thermal conductivity and can effectively transfer heat to the radiator or heat dissipation module. In addition, the silicone material also has good flexibility and adhesion, which can fill and fill the small gap between the components and improve the heat transfer efficiency. At the same time, the silicone material also has high insulation, which can prevent the flow of current and protect the safe operation of electronic devices.

It is important to note that different types of thermal silicone may have different ingredients and formulations to meet specific thermal requirements and working environments. Therefore, when choosing thermal silicone, please refer to the product description and consult a professional to get the right material and model for your application.


Electrical/mechanical properties (At TA=25℃)

Argument Symbol Test standard Performance index
Hardness shore A


GB/T 531.1


Elongation %


GB/T 528


Tensile strength MPa


GB/T 528


Shear strength MPa


GB/T 7124


Dielectric strength kV/mm


GB/T 1695


Dielectric constant 1.0MHz


GB/T 1693


Volume resistivity Ω·cm


GB/T 1692



Limiting parameter number (AtTA =25℃)

Argument Symbol

Numerical value

Table drying time min



Curing time H



Thermal conductivity W/m·K



Specific gravity g/cm³



Operating temperature


-60°C To +260°C

Storage temperature


 10°C To +25°C 


Thermal sealing silicone applicable range

Heat transfer silicone can be widely coated in a variety of electronic products, electrical equipment in the heating body (power tube, thyristor, electric heating pile, etc.) and heat dissipation facilities (heat sink, heat strip, shell, etc.) between the contact surface, heat transfer media. Suitable for microwave communication, microwave transmission equipment, microwave special power supply, voltage regulation power supply and other microwave devices surface coating or integral potting-sealing, such silicon materials for heat generation of electronic components, provide excellent heat dissipation and thermal conductivity effect. Such as: transistors, CPU assembly, thermistors, temperature sensors, automotive electronic parts, automotive refrigerators, power modules, printers and so on.


Thermal sealing silicone product standard

◆ In line with GB 33372-2020(VOC) volatile organic compounds certification, ◆ in line with REACH EU testing standards, ◆ enterprises through the flame retardant grade UL certification E358706◆ISO14001:2015 certification, ◆ISO9001:2015 certification.

◆ Reference standard: HG/T3947-2007 Single component room temperature vulcanized silicone adhesive/sealant ◆ Passed the national high-tech enterprise certification ◆ Our products have passed 1000 hours of cold and heat shock test, 1000 hours of double 85(high temperature and high humidity) test, 1000 hours of high temperature aging test, committed to providing reliable heat and heat transfer solutions for automotive, communications, security and other industries.

Environmental requirements: comply with RoHS directive and related environmental requirements

Citation standard :HG/T 3947-2007 single component RT-vulcanized silicone adhesive/sealant

Product description

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