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

Covestro Bayhydur 3100 Waterborne Curing Agent

Covestro Bayhydur® 3100 is a waterborne aliphatic polyisocyanate curing agent from the Bayhydur® XP series, designed for high-performance two-component waterborne coatings. It delivers excellent gloss retention, weather resistance, and fast ambient cure—ideal for automotive refinish, industrial wood, and plastic coatings requiring low VOC and superior durability.
  • covestro bayhydur 3100 waterborne curing agent_3b994c2d
  • covestro bayhydur 3100 waterborne curing agent_3b994c2d

Features Of Covestro Bayhydur 3100 Waterborne Curing Agent

  1. Waterborne aliphatic polyisocyanate crosslinker with low VOC and zero APEO content.

  2. Excellent compatibility with acrylic, polyester, and hybrid waterborne resins.

  3. Fast ambient-cure performance with good pot life stability in aqueous dispersions.

  4. Delivers outstanding gloss retention, weather resistance, and chemical resistance in final coatings.

  5. Enables high-film-build coatings without viscosity build-up or phase separation.

Typical Applications Of Covestro Bayhydur 3100 Waterborne Curing Agent

  1. Automotive OEM and refinish clearcoats and basecoats.

  2. Industrial maintenance coatings for metal substrates.

  3. Wood coatings requiring low-odor, high-clarity finishes.

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

Specifications Of Covestro Bayhydur 3100 Waterborne Curing Agent

Chemical TypeAliphatic polyisocyanate (HDI-based)
Product FormAqueous dispersion
AppearanceClear to slightly hazy, colorless to pale yellow liquid
NCO Content (wt%)7.5 – 8.5%
pH (25 °C)7.0 – 8.5
Viscosity (mPa·s, 25 °C)200 – 600
Solids Content (wt%)35 – 40%
Storage Stability≥ 6 months at 5–30 °C (unopened)


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