• Coatings

Desmodur® BL 3175 SN

Blocked aliphatic HDI-polyisocyanate. With Desmophen® grades to formulate lightfast one-component polyurethane stoving coatings; as an additive to improve flexibility and adhesion.

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Product Types

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


Elastic, Thermally resistant, Solventborne, Flexible

General Characterization

Blocked, aliphatic polyisocyanate based on HDI.
In combination with Desmophen® grades to formulate lightfast, one-component polyurethane stoving coatings; as an additive in conventional stoving systems to improve 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
Non-volatile content (0.2 g / 60 min / 80 °C) M020-ISO 3251 % 75 ± 2
Free NCO content, modified M105-ISO 11909 % ≤ 0.2
Color value (Hazen) M017-EN 1557 ≤ 60
Viscosity at 23 °C M014-ISO 3219/A.3 mPa*s 3,300 ± 400


Property Name Test Method Unit Value
Blocked NCO content % approx. 11.1
Equivalent weight approx. 380
Density at 20 °C DIN EN ISO 2811 g/ml approx. 1.06
Flash point DIN 53 213/1 °C approx. 45
Viscosity at 25 °C M014-ISO 3219/A.3 mPa*s approx. 2,800


Technical Data Sheet
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com

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