• Coatings

Crelan® EF 403

Cycloalipatic Polyuretdione without blocking agent. Hardener for polyurethane powder coatings.

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Product Types

  • Hardeners
  • Crosslinkers


Solvent-free, Weather resistant

General Characterization

Crelan EF 403 is a cycloaliphatic polyuretdione without blocking agent.
It is suitable as a hardener for polyurethane powder coatings.

Storage Conditions

Crelan EF 403 should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. The product is sensitive to moisture. Storage at higher temperatures will result in agglomeration of the product. This agglomeration is reversible by mechanical stress without adversely affecting the quality of the product. Recommended storage temperature is -5 to 40°C. Additionally, we recommend that the piling up of the pallets should be avoided.


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Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
Glass transition temperature °C 40 - 55
Hazen color value 10% in butanone ≤ 100
Non-blocked NCO content % ≤ 2.0

Property Name Test Method Unit Value
Total NCO content % approx. 13.5
Melting range °C approx. 70 - 78
Equivalent weight approx. 310


Technical Data Sheet
Safety Data Sheet
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