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Two-component polyurethane resin: flexibility and performance

What is a two-component polyurethane resin?

La two-component polyurethane resin is a reactive resin system obtained by mixing a polyol and an isocyanate. This rapid chemical reaction produces a material with exceptional properties in terms of flexibility, mechanical strength and resistance to harsh environments.

Renowned for its versatility, polyurethane resin is used for both pottingthe moulding, l'encapsulationthe flexible bonding or the protection of sensitive components. It stands out for its ability to combine high strength with flexibility, making it indispensable in the electronics, automotive, construction and energy industries.

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two-component polyurethane resin
3M 251 epoxy resin

Advantages of two-component polyurethane resin

The use of a two-component PU resin means you can benefit from a adaptable technical solution and efficient on a number of industrial criteria: 

  • Excellent flexibility or adjustable hardness (Shore A to D depending on formulation) 
  • High mechanical strength compression, peeling, shearing 
  • High resistance to humidityimpact and abrasion resistance 
  • Compatible with a wide variety of media plastics, metals, composites, glass, PCBs 
  • Reliable electrical insulation (ideal for encapsulation) 
  • Low polymerisation shrinkage dimensional stability 
  • Adjustable curing time Fast or long setting, depending on the process 
  • Excellent flowability filling complex moulds or cavities 

La two-component polyurethane resin is often preferred to epoxy in situations where a high level of durability is required. deformation, vibration, energy absorption or prolonged resistance to moisture. 

Potting and electronic encapsulation 

  • Filling of electronic boxes, transformers, relays and sensors 
  • Protection against moisture, dust and chemicals 
  • Absorption of vibrations and electrostatic discharges 
  • Use in embedded electronics, connectivity, home automation, smart devices 

Industrial moulding and prototyping 

  • Manufacture of flexible or semi-rigid technical parts 
  • Moulding of parts with complex geometries or rapid prototyping 
  • Replacement of short-run plastic injection parts 

Insulation and thermal protection 

  • Coating low-voltage electrical components 
  • Creation of flexible or shock-absorbing thermal barriers 
  • Compatibility with heat-sensitive substrates 

Automotive, rail and defence industries 

  • Encapsulation of connectors, harnesses or embedded boards 
  • Resistant to chemical splashes, vibrations and thermal cycles 
  • Reduce interference and improve equipment longevity 

At ADDEV MaterialsWe offer a complete range of two-component polyurethane resins to meet a wide range of industrial needs:

  • Flexible resins for potting and encapsulation

  • Rigid resins for technical moulding and structural parts

  • Specific formulations for casting, bonding or industrial production

  • Resins suitable for low temperatures or high chemical resistance

👉 Need advice or a sample? Contact us for a technical recommendation.

At ADDEV Materialswe select two-component polyurethane resins to the highest industry standards: 

  • UL94 V-0, EN45545, FAR 25, ISO 10993, REACH / RoHS 
  • Thermal resistance : up to +130 °C depending on formulation / dielectric strength up to 20 kV/mm 
  • Internal tests substrate compatibility, chemical resistance, flexibility, accelerated ageing 
  • Supply of TDS, SDS, certificates of conformity 
  • Solutions available cartridges, flexible bags, dosing kits, buckets, drums, compatible with your automatic or manual dosing equipment 

ADDEV Materials can help you with your potting, moulding, encapsulation and protectionwith a comprehensive resin offering and expert support: 

  • Wide range of PU resins : flexible, semi-rigid, transparent, fire-retardant 
  • Partnership with the best manufacturers Elkem, MG Chemicals, Bostik, Henkel, Dow... 
  • Customisable technical formulations depending on viscosity, setting time, mechanical strength 
  • Full technical support : trials, tests, product selection, application assistance 
  • Adapted formats and packaging to your production: from cartridge to barrel 

We can help you to save time, securing your components, reduce your risksand comply with your standards. 

📞Contact our experts ADDEV Materials to receive a recommendations tailored to your projecta technical proposal or a quick quotation for your two-component polyurethane resin. 

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FAQ - Two-component polyurethane resin

Polyurethane resin offers greater flexibility and impact resistance, while epoxy resin is stiffer and more mechanically resistant.

La polyurethane resin for potting is ideal because it offers excellent protection against moisture, impact and chemical attack.

Yes, some formulations are highly resistant to UV, weather and thermal cycles.

It varies from a few minutes to several hours depending on the formulation and application conditions.

Yes, we offer colourable formulations or specific fillers to adapt the resin to your needs.