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

Covestro Bayhydur BL 5335 Waterborne Curing Agent

Covestro Bayhydur BL 5335 is a waterborne aliphatic polyisocyanate curing agent from the Bayhydur® BL series, designed for high-performance, low-VOC two-component waterborne coatings. It offers excellent gloss retention, weather resistance, and fast ambient-cure capability—ideal for automotive refinish, industrial wood, and plastic coatings requiring eco-friendly, durable finishes.
  • covestro bayhydur bl 5335 waterborne curing agent_44a9108d
  • covestro bayhydur bl 5335 waterborne curing agent_44a9108d

Features Of Covestro Bayhydur BL 5335 Waterborne Curing Agent

  1. Waterborne aliphatic polyisocyanate dispersion offering low VOC and reduced environmental impact.

  2. Excellent compatibility with aqueous acrylic and polyester dispersions for stable two-component systems.

  3. Fast ambient-cure performance with good early hardness development and low temperature curing capability.

  4. Superior hydrolytic stability compared to conventional waterborne isocyanates, ensuring extended pot life.

  5. Provides outstanding gloss retention, weather resistance, and chemical resistance in final coatings.

Typical Applications Of Covestro Bayhydur BL 5335 Waterborne Curing Agent

  1. Architectural wall coatings requiring high durability and low-emission compliance.

  2. Industrial maintenance coatings for metal substrates in transportation and infrastructure sectors.

  3. Wood finishing coatings for furniture and interior joinery where low odor and fast turnaround are critical.

  4. Plastic coatings for automotive interior parts and consumer electronics housings.

  5. High-performance floor coatings for commercial and institutional buildings.

Specifications Of Covestro Bayhydur BL 5335 Waterborne Curing Agent

Chemical TypeAliphatic polyisocyanate (HDI-based) dispersion
Product FormWhite to slightly yellow liquid dispersion
AppearanceOpaque, homogeneous dispersion
Solids Content (wt. %)48–52 %
NCO Content (wt. %)6.0–7.0 %
pH7.5–9.0
Density (20 °C)1.08–1.12 g/cm³
Viscosity (23 °C, Brookfield RVT, spindle #3, 20 rpm)150–400 mPa·s


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