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

Covestro Desmodur BL 3370 MPA Curing Agent

Covestro Desmodur BL 3370 MPA Curing Agent is a low-viscosity aliphatic polyisocyanate from the Desmodur BL series, designed for high-performance UV- and thermal-cure coatings. It offers excellent weather resistance, gloss retention, and compatibility with acrylates and polyols—ideal for automotive clearcoats and industrial finishes requiring durability and clarity.
  • covestro desmodur bl 3370 mpa curing agent_95982d28
  • covestro desmodur bl 3370 mpa curing agent_95982d28

Features Of Covestro Desmodur BL 3370 MPA Curing Agent

  1. High reactivity with polyols, enabling fast gelation and reduced cycle times in coating and adhesive applications.

  2. Excellent compatibility with aliphatic and aromatic polyol systems, supporting formulation flexibility.

  3. Low viscosity at ambient temperature for easy handling, metering, and homogeneous mixing without solvent dilution.

  4. Outstanding UV stability and color retention due to its aliphatic isocyanate chemistry.

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

Typical Applications Of Covestro Desmodur BL 3370 MPA Curing Agent

  1. High-performance two-component polyurethane topcoats for automotive clearcoats and refinish systems.

  2. Durable protective coatings for industrial equipment, metal substrates, and architectural facades.

  3. Flexible yet abrasion-resistant elastomeric flooring and sports surface systems.

  4. High-gloss, weather-resistant coatings for plastic and composite substrates in transportation and consumer goods.

  5. Adhesives and sealants requiring rapid build-up of cohesive strength and long-term hydrolytic resistance.

Specifications Of Covestro Desmodur BL 3370 MPA Curing Agent

Chemical TypeAliphatic polyisocyanate (hexamethylene diisocyanate-based)
Product FormLiquid
AppearanceClear, pale yellow liquid
NCO Content (wt %)15.8 – 16.4
Viscosity at 25 °C (mPa·s)800 – 1,200
Density at 20 °C (g/cm³)1.12 – 1.15
Flash Point (PMCC, °C)145 – 155
Storage Stability (unopened, 25 °C)≥ 12 months


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