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When things need to be tight: single-component polyurethane foams from CeraPUR®

The CeraPUR® sealing materials are solvent-free and very fast cross-linking single-component elastomers. They are mechanically foamed, processed at room temperature in a standard room atmosphere and enable the efficient, environmentally friendly and reliable application of foamed seals – without the well-known problems such as the pot life, rinsing, test shots or the search for the right mixing ratio. During the foaming process, gas pores – the cells of the PUR foam – develop in the raw material. The higher the share of closed cells, the less moisture can penetrate. Due to the purely physical foaming process and clever combination of raw materials, CeraPUR® foam beads exhibit predominantly closed-cell structures and outstanding hydrolysis

resistance after curing. CeraPUR® is also extremely tear-resistant. A decisive advantage not only during installation, but also in terms of tightness. We offer  CeraPUR® in various designs, degrees of softness and colours, tailor-made to provide protection against moisture and dirt or for noise attenuation. In our laboratory and application technology department we are always working on further improvements and developing customised special solutions for specific requirements. Always in focus: certified quality, environmental compatibility and occupational safety. Simply talk to our specialists and you will receive the perfect sealing material for your demanding applications.

The most important advantages at a glance

  • Mechanical foaming process without pot life, rinsing or test shots
  • Predominantly closed-cell structure: extreme tightness
  • Excellent resistance to hydrolysis
  • Very good recovery behaviour
  • Extreme tear resistance
  • Fast curing: cycle times of less than 2 seconds

Closed cells

During the foaming process, gas pores – the cells of the PUR foam – develop in the raw material. The higher the share of closed cells, the less moisture can penetrate. Due to the purely physical foaming process of the CeraPUR® materials, the vast majority of the foam cells formed are closed foam cells. This outstanding property results in a low level of water absorption.

Tear resistance

In practice, it is not unusual for the soft foam bead to become damaged when a component is being installed. The more tear-resistant the PUR foam, the less often such damage occurs. An innovative manufacturing process of the base polymers contained in CeraPUR® guarantees this property and makes a decisive contribution to tightness.

Tightness

Especially in the case of seals which are subjected to dynamic loads, the degree of tightness of a foam bead can depend on the following properties, among others:

  • compression
  • tear resistance
  • closed cell structure

CeraPUR® achieves very good values in this respect.

CeraPUR® in use

Selecting the right sealing material is only one of many factors on the way to the perfect result. Equally decisive are the component design and any pre- and post-treatments. Our experienced application engineers will be pleased to advise you.

Application technology

Downloads

Here you will find further information and downloads on CeraPUR® sealing materials and CeraCon Sealing systems.

Brochure: CeraPUR®

Single-component polyurethane foams

Brochure: CeraCon Sealing systems

Innovative single-component foam sealing technology

Downloads in other languages or on other topics can be found in our own Download Centre.

Do you have any questions, or would you like to specifically discuss your individual requirements in the field of sealing materials? We are here for you.

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