• Coatings, paints & inks

Desmodur® BL 3370 MPA

Blocked aliphatic HDI-polyisocyanate.To formulate lightfast one-component stoving polyurethane coatings with high themal yellowing resistance; as an additive to improve flexibility and adhesion.

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Product Types

  • PIC
  • Aliphatic polyisocyanate
  • Crosslinkers
  • Polyisocyanate
  • Hardeners
  • Polyisocyanurate
  • Isocyanate


Coatings, paints & inks
Solventborne, Flexible, Thermally resistant, Elastic

General Characterization

Blocked aliphatic polyisocyanate based on HDI.
In combination with Desmophen® grades to formulate lightfast, one-component stoving polyurethane coatings with high resistance to thermal yellowing; as an additive in conventional stoving coating systems to improve the reactivity, flexibility and adhesion.

Storage Conditions

- Storage in original sealed Covestro container.

- Recommended storage temperature: 0 - 30 °C.

- Protect from moisture, heat and foreign material.

General information: Storage at higher temperatures will result in increase of color and viscosity. Storage at significant lower temperatures will result in solidification. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product.


No data available

Packaging Type

No data available

Technical Properties & Datasheets


Property Name Test Method Unit Value
Flash point DIN 53 213/1 °C approx. 49
Viscosity at 25 °C M014-ISO 3219/A.3 mPa*s approx. 3,200
Density DIN EN ISO 2811 g/cm3 approx. 1.08
Equivalent weight approx. 470
Blocked NCO content % approx. 8.9


Property Name Test Method Unit Value
Non-volatile content (1 g / 60 min / 80 °C) M020-ISO 3251 % 70 ± 3
Free NCO content, modified M105-ISO 11909 % ≤ 0,20
Color (Hazen) M017-EN 1557 ≤ 60
Viscosity at 23 °C M014-ISO 3219/A.3 mPa*s 3,800 ± 1,200


Technical Data Sheet
Safety Data Sheet
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