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

Covestro Desmodur L 75 Isocyanate Curing Agent

Covestro Desmodur® L 75 is a low-viscosity aliphatic polyisocyanate curing agent from the Desmodur® L series, designed for high-performance 2K PU coatings. It offers excellent weather resistance, gloss retention, and compatibility with hydroxyl-functional resins—ideal for automotive clearcoats, industrial finishes, and plastic coatings requiring UV stability and low yellowing.
  • covestro desmodur l 75 isocyanate curing agent_29ecb437
  • covestro desmodur l 75 isocyanate curing agent_29ecb437

Features Of Covestro Desmodur L 75 Isocyanate Curing Agent

  1. Low-viscosity aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) trimer.

  2. Excellent weather resistance and UV stability, enabling long-term gloss and color retention.

  3. Fast-curing capability at ambient or elevated temperatures for efficient production cycles.

  4. Compatible with a wide range of hydroxyl-functional resins including polyesters, acrylics, and polyethers.

  5. Non-yellowing performance ideal for high-end clearcoats and topcoat applications.

Typical Applications Of Covestro Desmodur L 75 Isocyanate Curing Agent

  1. Automotive OEM and refinish clearcoats.

  2. High-performance industrial maintenance coatings.

  3. Powder coating formulations requiring low-cure temperature response.

  4. Wood finishing systems demanding exceptional clarity and durability.

  5. Plastic coatings for automotive interior and exterior components.

Specifications Of Covestro Desmodur L 75 Isocyanate Curing Agent

Chemical TypeAliphatic HDI-based polyisocyanate (trimer)
Product FormLiquid
AppearanceColorless to pale yellow transparent liquid
NCO Content (wt %)15.5 – 16.5
Viscosity at 25 °C (mPa·s)300 – 600
Density at 20 °C (g/cm³)1.18 – 1.22
Flash Point (PMCC, °C)≈ 150
Storage Stability (unopened, 25 °C)≥ 12 months


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