• Coatings

Desmodur® N 3800

Aliphatic polyisocyanate (flexibilizing HDI trimer). As the hardener component for lightfast polyurethane coating systems.

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Product Types

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


Elastic, Solventborne, Weather resistant, Flexible, High functional

General Characterization

Desmodur N 3800 is an aliphatic polyisocyanate (flexibilizing HDI trimer).
It is suitable for use as the hardener component for lightfast polyurethane coating systems.

Storage Conditions

Desmodur N 3800 should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. The product is sensitive to moisture. Storage at higher temperatures will result in increase of color and viscosity. Due to the raw materials used, the product can occasionally exhibit temperature-dependent turbidity. This turbidity can be reversed by thinning with solvents or heating carefully to maximum 50°C without adversely affecting the quality of the product. Recommended storage temperature is 0º-30ºC.


No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
Viscosity at 23°C mPa∙s 6,000 ± 1,200
NCO content % 11.0 ± 0.5
Hazen color value ≤ 80
Monomeric HDI % ≤ 0.25

Property Name Test Method Unit Value
Equivalent weight approx. 382
Density at 20°C g/cm^3 1.12
Weight per gallon at 20°C lb. 9.33
Flash point °C approx. 235
Viscosity at 25^oC mPa∙s approx. 5,500


Technical Data Sheet
Safety Data Sheet
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