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

Covestro Desmodur L75 Curing Agent

Covestro Desmodur L75 Curing Agent is a low-viscosity aliphatic polyisocyanate hardener in the Desmodur L series. It delivers excellent UV stability, gloss retention, and weather resistance for two-component polyurethane coatings. Widely used in automotive refinish, industrial wood, and plastic coatings where fast curing and optical clarity are critical. Compatible with hydroxyl-functional resins and suitable for ambient or forced-dry applications.
  • covestro desmodur l75 curing agent_078c8e5f
  • covestro desmodur l75 curing agent_078c8e5f

Features Of Covestro Desmodur L75 Curing Agent

  1. Aliphatic polyisocyanate blend based on hexamethylene diisocyanate (HDI) trimer chemistry.

  2. Low viscosity and excellent compatibility with common polyols and acrylic resins for easy processing.

  3. Provides outstanding UV stability and gloss retention in demanding outdoor applications.

  4. Non-yellowing performance ideal for clearcoats and light-colored coatings.

  5. Compliant with major global VOC regulations, including EU Directive 2004/42/EC and US EPA standards.

Typical Applications Of Covestro Desmodur L75 Curing Agent

  1. Automotive refinish clearcoats and basecoats.

  2. Industrial maintenance coatings for metal and plastic substrates.

  3. High-performance wood coatings requiring durability and clarity.

  4. Plastic coatings for automotive interior and exterior trim components.

  5. General-purpose two-component polyurethane topcoats for OEM and aftermarket use.

Specifications Of Covestro Desmodur L75 Curing Agent

Chemical TypeAliphatic HDI-based polyisocyanate (trimer)
Product FormLiquid
AppearanceClear, colorless to pale yellow liquid
NCO Content (wt %)15.5–16.5
Viscosity at 25 °C (mPa·s)1,800–2,400
Density at 20 °C (g/cm³)1.18–1.22
Solvent Content (wt %)~65–70 (in acetate ester blend)
Primary Applications2K PU clearcoats, industrial finishes, plastic coatings


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