Tailor-made chemistry for growing requirements.

FERMAPOR® CC material systems are addition cross-linking 2-component systems for the manufacture of soft polyurethane foams. The main elements of the A component are polyfunctional alcohols, the polyols. The B component consists of the aromatic MDI isocyanate and its derivatives.


When component A is mixed with component B, a chemical reaction starts that, together with Sonderhoff Engineering’s newly developed FIP-CC process, leads to the formation of a strongly closed-cell polyurethane soft foam.

For further information please do not hesitate to contact us.


Low water absorption even for damaged surfaces


FERMAPOR® CC with its smooth, slightly shiny surface gives an optically high-quality appearance. Its foam structure has very fine cells, is impermeable and extremely uniform.

Even if the surface should become damaged during application, practical trials and laboratory tests have shown that there is only a marginal change in water absorption.

Usual processing conditions - typical polyurethane

As soon as the foam has completely hardened, it can be used for applications with high sealing and quality requirements. The operating temperature range lies between -40° to +80°C, and in the short term even up to +160°C dependent on the test conditions, and is tested under real conditions appropriate to the application.

The exact hardening time is dependent on external factors such as temperature, humidity, and sealing dimension and it is also evaluated specifically for the sealed part.

Proven and new benefits - typical polyurethane


  • Mostly closed cells, therefore extremely low water absorption
  • More cost-effective than silicone material and for curing there’s no need for an oven or humidity
  • Even with damaged surface the gasket will hardly absorb water
  • For accelerated curing an oven can be used
  • 90% less air permeability than 2C PU-foam with mixed cells
  • Significantly less swelling because of iced water
  • Formulation may be customized like mixed cells 2C PU
  • Thixotropic and semi-thixotropic formulations available
  • Shrinking is no more possible
  • Meets the standards REACH/ EG-Regulation 1907/2006, RoHS

Diversity of formulations - typical polyurethane

Because FERMAPOR® CC is formulated on a polyurethane basis, the know-how based on over 1,000 Sonderhoff polyurethane formulations is available for the variations of FERMAPOR® CC.

Sonderhoff Chemicals’ extensive experience in developing customer-specific material systems is also completely used for this new material system. Feel free to contact us; we will be pleased to develop the suitable material solution for your requirement.

Das genaue Zusammenspiel unterschiedlicher Einstellungsparameter und Zusatzfunktionen der Misch- und Dosiermaschinen, die exakte Abstimmung von Bauteil und FERMAPOR® K31 Schaumdichtung in der Gesamtkonstruktion sowie die richtige Materialauswahl ermöglichen erst eine wirklich sichere Abdichtung industrieller Bauteile für unterschiedlichste Anwendungen gegen Feuchtigkeit, Staub und andere Umgebungseinflüsse.

FERMAPOR® CC - Processing Information

FERMAPOR® CC systems are processed with 2-component medium-pressure mixing and dosing machines. The recommended processing temperature is +23° +/- 5°C. Generally, FERMAPOR® CC components have a shelf-life for at least 6 months at storage temperatures from +10°up to +40°C.


Property    FERMAPOR® CC
Appearance    black, other colours on request
Hardness    from 40 to 70 Shore 00
Compression resistance (25% compression) > 20 kPa
Bulk density from 0,30 g/cm3 to 0,50 g/cm3
Temperature resistance from -40 °C to +80 °C (short term up to +160°C)
Tensile strength from 150 kPa to 500 kPa
Elongation at fracture 100 % to 150 %
Resilience (compression set) >95% dependent on the test conditions
Water absorption <10% (material is already waterproofed)