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

Covestro Desmodur L75A Curing Agent

Covestro Desmodur L75A Curing Agent is a low-viscosity aliphatic polyisocyanate hardener in the Desmodur L series. It delivers excellent UV stability, weather resistance and gloss retention for high-performance two-component polyurethane coatings used in automotive refinish, industrial maintenance and plastic coating applications.
  • covestro desmodur l75a curing agent_b3c1d9e4
  • covestro desmodur l75a curing agent_b3c1d9e4

Features Of Covestro Desmodur L75A Curing Agent

  1. Aliphatic polyisocyanate blend based on hexamethylene diisocyanate (HDI), offering excellent UV stability and color retention.

  2. Low-viscosity liquid formulation enabling easy handling, precise metering, and compatibility with standard spray and mixing equipment.

  3. Fast-reacting curing agent optimized for ambient- and low-bake cure systems without requiring catalysts.

  4. Provides outstanding chemical resistance, hardness, and abrasion resistance in final polyurethane coatings.

  5. Compliant with major global regulatory frameworks including REACH and VOC-compliant formulations (≤400 g/L).

Typical Applications Of Covestro Desmodur L75A Curing Agent

  1. High-performance industrial maintenance coatings for machinery, steel structures, and offshore assets.

  2. Automotive refinish clearcoats and basecoat/clearcoat systems requiring gloss retention and weatherability.

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

  4. Wood coatings for premium furniture and architectural millwork demanding durability and clarity.

  5. General-purpose two-component polyurethane topcoats for metal, concrete, and composite substrates.

Specifications Of Covestro Desmodur L75A Curing Agent

Chemical TypeAliphatic HDI-based polyisocyanate blend (trimer-rich)
Product FormClear to pale yellow liquid
AppearanceHomogeneous, transparent, slightly viscous liquid
NCO Content (wt %)19.5 – 20.5%
Viscosity at 25 °C (mPa·s)1,800 – 2,500
Density at 20 °C (g/cm³)1.18 – 1.22
Solvent ContentAcetate-based (e.g., ethyl acetate, butyl acetate)
Primary Applications2K PU coatings for industrial, automotive refinish, and plastic applications


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