• Adhesives

Desmocoll® 621/1

Desmocoll 621/1 is a predominantly linear hydroxyl polyurethane.

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Product Types

  • PU resin


Heat activated, Solventborne

General Characterization

Predominantly linear hydroxyl polyurethane.
Desmocoll® 621/1 is a flexible polyurethane with a high rate of crystallization and low thermoplasticity. It has good adhesion on many flexible PVC substrates. Desmocoll® 621/1 is characterized in particular by its long tack live after thermal activation.

Storage Conditions

- Storage in original sealed Covestro containers.

Recommended storage temperature: 10 - 25 °C.

- Protect from direct sunlight, moisture, heat and foreign material.


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Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
Solution viscosity, 15 % inbutanone-2 (MEK) at 23 °C, Haake DIN EN ISO 3219/A.3 mPa*s 1,800 ± 300

Property Name Test Method Unit Value
Density DIN EN ISO 2811 g/ml approx. 1.2
Bondability of materials containing plasticisers DIN EN 15307 very good
Minimum activation temperature DIN EN 12961 °C approx. 55
Hydroxyl content DIN 53 240 % < 0.1
Hot tack life DIN EN 12961 min approx. 8
Crystallization DIN 53 505 h approx. 2
Heat resistance ASTM D 816 °C approx. 70


Technical Data Sheet
Safety Data Sheet
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