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Silicone resin: insulation, moulding and protection

What is silicone resin?

La silicone resin is a silicone-based organo-mineral polymer used in demanding industrial environments to protect, encapsulate, mould or insulate sensitive components. 

It generally takes the form of two-componentIt hardens at room temperature or under heat, forming a flexible, resistant and stable material over the long term. 


Its exceptional flexibility, thermal resistance, elasticity and chemical stability have made it a benchmark in many sectors: electronics, medical, aeronautics, energy, automotive or industrial automation. 

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Silicone resin BLUESIL RTV 148A 1kg Beige
Dow Corning silicone resin

Advantages of silicone resin

The use of a technical silicone resin ensures that the comprehensive, reliable and long-lasting protection in the harshest environments: 

  • Excellent thermal resistance from -60°C to +250°C, or even higher depending on the formulation. 
  • Permanent flexibility after polymerisation: no shrinkage, no cracks. 
  • Resistant to moisture, UV, chemical agents and thermal cycles. 
  • Absorbs vibrations and mechanical expansion. 
  • Chemical inertia Suitable for medical, food and optical applications. 
  • Curing without mechanical stresseven on fragile or heat-sensitive materials. 

Silicone resin is a material versatilewhich combines physical and chemical protection while respecting the constraints of flexibility, stability and safety. 

Electronics and electrical engineering 

  • Encapsulation of sensitive electronic components. 
  • Filling connectors, relays, sensors, coils, etc. 
  • Protection against humidity, electrostatic discharge and aggressive environments. 

Silicone resin is ideal for insulation of components subjected to thermal cycles or vibratory shockswhere other resins become brittle. 

Moulding and prototyping 

  • Manufacture of flexible, reproducible mouldsused for moulding resin, plaster, concrete or wax. 
  • Moulding complex parts with excellent detail reproduction. 
  • Artistic, industrial or medical applications. 

La RTV (Room Temperature Vulcanizing) silicone resin is commonly used for high-precision moulding without the need for an oven. exceptional demouldability. 

Medical, cosmetics, food 

  • Standard-compliant resins FDA or biocompatibleused for : 
  • Flexible prostheses 
  • Food casting moulds 
  • Medical devices or components of on-board electronic devices 

The hypoallergenic and stable properties of silicone resin are sought after to guarantee user safety. 

Aerospace, defence and energy 

  • Protection of on-board components against humidity, electrical shock and vibration. 
  • Stability at high altitude or in extreme environments. 
  • Encapsulation of critical systems for sensitive applications. 

Thanks to its lightness low smoke emissionsand its long-term stabilitySilicone resin is also used in avionics and on-board electronics. 

Encapsulating silicone resin 

Formulated for completely encapsulate electronic componentssilicone encapsulating resin offers a high level of 360° protection. 

  • Room temperature or accelerated curing 
  • Low viscosity for good filling 
  • Long-lasting dimensional stability 

High-temperature silicone resin 

Designed to withstand peaks of up to +250 °C, or even +300 °CThis resin is ideal for : 

  • Engine components, thermal sensors 
  • Heating or control systems 
  • Industrial environments exposed to continuous heat sources 

Flexible silicone resin 

This formulation ensures permanent flexibilityeven after years in a damp or cold environment. 

  • Ideal for absorbing material expansion 
  • Recommended for embedded or mobile applications 
  • Compatible with fragile or heat-sensitive substrates 

At ADDEV Materialswe select silicone resins comply with the most stringent requirements: 

  • UL94 V-0, EN45545, FAR 25, ISO 10993, FDA, REACH / RoHS
     
  • Temperature resistance from -60 °C to +250 °Chigh dielectric strength (up to 25 kV/mm depending on formulation)

  • Internal tests ageing stability, substrate compatibility, chemical resistance, cold flexibility

  • Supply of TDS, SDS, certificates of conformity, biocompatibility or food declarations if required

  • Available formats cartridges, syringes, flexible bags, jars, drums, adapted to your dosing or encapsulation equipment 

At ADDEV Materialswe can provide you with a complete range of technical silicone resinswith expert support from start to finish: 

  • Certified resins (UL, RoHS, REACH, FDA, MIL, EN45545...). 
  • Fast, standard or delayed-setting formulationsdepending on your process. 
  • Wide choice of packaging cartridges, kits, drums, syringes, bags. 
  • Partnerships with leading brands such as Elkem®, Wacker®, Dow®, MG Chemicals®, etc. 
  • Dedicated technical support definition of specifications, adhesion testing, compatibility validation. 

We support you in selection, testing, integration and optimisation of your silicone resins, with the aim of make your production more reliable and secure your components. 

📞 Contact ADDEV Materials as of now for a technical recommendation or to receive a sample of silicone resin adapted to your application, temperature, humidity or durability constraints. 

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Our strategic suppliers of silicone resins

3M logo
BLUESTAR SILICONES logo

FAQ - Silicone resins

It is a liquid or pasty polymer that hardens by chemical reaction and offers a high level of resistance. high flexibility, excellent thermal resistance and a very good electrical insulation. It is used for moulding, encapsulating and protecting components. 

La epoxy resin is rigid when cured, very resistant mechanically, but sensitive to vibration. The silicone resinIt remains flexible, is more elastic, resists extreme temperatures better and absorbs shocks better. 

Yes, it's ideal for encapsulating electronic cards, sensors or connectorsThanks to its insulating properties and its ability to follow thermal expansion without constraint. 

Yes. Thanks to his resistance to UV, humidity and extreme temperaturesIt is perfectly suited to outdoor or on-board environments. 

Yes. Some formulations are certified biocompatible or compliant with food standards (FDA, USP). They are used in prostheses, food moulds or medical devices.