2-component polyurethane casting resin /PUR casting resin, curing at room temperature

Polyols are cured with isocyanate (for example, MDI or HDI). The reaction comes into effect directly upon mixing these components. The reaction heat created is therefore moderate, whereby larger casting volumes are allowed for as well. Polyurethanes are the preferred material due to the lower prices.

Moisture reacts with isocyanate to CO2, which is undesirable when fully sealed. That is why we have resin components, which contain moisture captors in order to make the casting resin insensitive to moisture.

Depending on the requirements, casting resin with the following properties can be obtained:

  • Low viscosity and simple handling
  • Good heat conductivity
  • Low exothermic energy and shrinkage
  • Reactivity can be adjusted simply
  • Gel time of 2 minutes to 90 minutes possible
  • Handling also possible with lower temperatures
  • Flexibility by low temperatures as well
  • Ideal for pressure-sensitive components
  • Good crack resistance, also thermal cycles
  • Casting of large components
  • Chemical resistance
  • Good adhesion
  • Low costs
  • Low mixture viscosities with excellent fluidity
  • High filling degree with good handling
  • UL 94 V0 permission


We offer:

  • Filled polyurethane with UL 94 V0 permission
    Arathane CW 5620/HY 5610, low viscosity and flexible
    Arathane CW 5631/HY 5610, heat resistant up to 150°C
    Arathane CW 5650/HY 5610, cold flexible