• Coatings

Desmodur® ultra N 3700

As the hardener component for lightfast, fast drying polyurethane coating systems.

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Product Types

  • PIC
  • Aliphatic polyisocyanate
  • Crosslinkers
  • Polyisocyanate
  • Hardeners
  • Polyisocyanurate
  • Isocyanate


High functional, Solvent-free, Weather resistant

General Characterization

Aliphatic polyisocyanate (highly functional HDI trimer).
As the hardener component for lightfast, fast drying polyurethane coating systems.

Storage Conditions

- Storage in original sealed Covestro container.

- Recommended storage temperature: 0 - 30 °C.

- Protect from moisture, heat and foreign material.

General information: The product is sensitive to moisture. Storage at higher temperatures will result in increase of color and viscosity. Storage at significant lower temperatures will result in solidification. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product.


No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
Monomeric HDI M106-ISO 10283 % < 0.1
Viscosity at 23 °C M014-ISO 3219/A.3 mPa*s 16,000 ± 4,000
NCO content M105-ISO 11909 % 20.0 ± 1.0
Color value (Hazen) M017-EN 1557 ≤ 80

Property Name Test Method Unit Value
Density at 20 °C DIN EN ISO 2811 g/ml approx. 1.17
Viscosity at 25 °C DIN EN ISO 3219/A.3 mPa*s approx. 13,000
Equivalent weight approx. 210
Flash point DIN EN 22 719 °C approx. 247


Technical Data Sheet
Safety Data Sheet
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