• Adhesives

Desmocoll® 621/1

Predominantly linear, flexible hydroxyl polyurethane with a high crystallisation rate and low thermoplasticity. Good adhesion on PVC substrates. Suitable to formulate adhesives with a long tack life.

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Product Types

  • PU resin


Heat activated, Solventborne

General Characterization

Desmocoll 621/1 is a 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

Desmocoll 621/1 should be stored in tightly sealed original containers and protected from direct sunlight, moisture, heat, and foreign materials. Recommended storage temperature is 10º-25ºC.


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Packaging Type

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Technical Properties & Datasheets

Property Name Test Method Unit Value
Solution viscosity , 15% inbutanone-2 (MEK)at 23°C, Haake mPa∙s 1,500 - 2,100

Property Name Test Method Unit Value
Bondability of materials containing plasticizers Very good
Heat resistance °C approx. 70
Crystallization h approx. 2
Hydroxyl content % < 0.1
Density g/ml approx. 1.2
Hot tack life min. approx. 8
Minimum activation temperature °C approx. 55


Technical Data Sheet
Safety Data Sheet
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