Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Covestro Desmodur N 3390 Polyisocyanate Curing Agent

Covestro Desmodur N 3390 is a premium aliphatic polyisocyanate curing agent from the Desmodur N series, offering excellent UV stability, low viscosity, and fast reactivity for high-performance two-component polyurethane coatings and adhesives.
  • covestro desmodur n 3390 polyisocyanate curing agent_75de5c33
  • covestro desmodur n 3390 polyisocyanate curing agent_75de5c33

Features Of Covestro Desmodur N 3390 Polyisocyanate Curing Agent

  1. Aliphatic HDI-based trimer with excellent UV stability and color retention.

  2. Low-viscosity liquid enabling easy handling, metering, and formulation without solvents.

  3. High functionality and reactivity for rapid curing and superior crosslink density.

  4. Excellent chemical resistance, including resistance to hydrolysis and abrasion.

  5. Compliant with REACH and meets stringent VOC regulations for industrial coatings.

Typical Applications Of Covestro Desmodur N 3390 Polyisocyanate Curing Agent

  1. High-performance automotive clearcoats and basecoats.

  2. Premium industrial maintenance coatings for machinery and infrastructure.

  3. UV-resistant plastic coatings for outdoor applications.

  4. Two-component (2K) polyurethane topcoats for wood and metal substrates.

  5. Specialty coatings requiring gloss retention and weatherability in architectural facades.

Specifications Of Covestro Desmodur N 3390 Polyisocyanate Curing Agent

Chemical TypeAliphatic HDI trimer (isocyanurate)
Product FormLiquid
AppearanceClear, pale yellow liquid
NCO Content (wt %)21.5 – 22.5%
Viscosity at 25 °C1,800 – 2,400 mPa·s
Density at 20 °C1.21 – 1.23 g/cm³
Flash Point (PMCC)145 – 155 °C
Primary Applications2K polyurethane coatings requiring weather resistance and low yellowing


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