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

Covestro Desmodur BL3575/1 MPA/SN Curing Agent

Covestro Desmodur BL3575/1 MPA/SN is a high-performance aliphatic polyisocyanate curing agent from the Desmodur BL series, designed for 2K polyurethane coatings requiring excellent weather resistance, low viscosity, and fast ambient-cure capability—ideal for automotive clearcoats and industrial finishes.
  • covestro desmodur bl3575 1 mpa sn curing agent_c99cf43c
  • covestro desmodur bl3575 1 mpa sn curing agent_c99cf43c

Features Of Covestro Desmodur BL3575/1 MPA/SN Curing Agent

  1. Highly reactive aliphatic polyisocyanate blend optimized for low-VOC, high-performance two-component polyurethane systems.

  2. Excellent compatibility with hydroxyl-functional acrylics, polyesters, and polycarbonates for robust film formation.

  3. Superior weather resistance and UV stability—ideal for demanding exterior applications without yellowing.

  4. Controlled viscosity and pot life enabling reliable spray application and consistent crosslinking performance.

  5. Compliant with major global regulatory frameworks including REACH and TSCA; free of dibutyltin dilaurate (DBTDL).

Typical Applications Of Covestro Desmodur BL3575/1 MPA/SN Curing Agent

  1. Automotive OEM clearcoats and topcoats requiring exceptional gloss retention and chip resistance.

  2. High-end industrial maintenance coatings for rail, wind turbine blades, and construction equipment.

  3. Premium architectural coatings for façades, aluminum composite panels (ACPs), and curtain wall systems.

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

  5. Specialty wood finishes where clarity, hardness, and chemical resistance are critical.

Specifications Of Covestro Desmodur BL3575/1 MPA/SN Curing Agent

Chemical TypeAliphatic polyisocyanate blend (HDI-based)
Product FormLiquid
AppearanceClear, pale yellow liquid
NCO Content (wt %)15.0 – 16.0
Viscosity at 25 °C (mPa·s)1,800 – 2,400
Density at 20 °C (g/cm³)1.16 – 1.19
Flash Point (PMCC, °C)125 – 135
Primary Applications2K PU clearcoats, industrial maintenance, architectural façade coatings


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