Sealing systems based on polyurethane and silicone

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Sealing systems

The all-rounders based on polyurethane and silicone

The basic task of sealing systems is to efficiently protect components against moisture, chemicals, and various environmental influences.

RAMPF Polymer Solutions is a leading specialist in liquid to highly thixotropic two-component foam gaskets and elastomer seals based on polyurethane and silicone.

The foam gaskets are processed using FIPFG (formed in place foam gasket) or FIPG (formed in place gasket) technology.

Unlike dispensing system gaskets that are inserted or stuck on, the foam gaskets are applied directly to the component. They expand in situ and bond very quickly, which reduces cycle times and also ensures more efficient processing.


Our RAKU® PUR and RAKU® SIL systems combine efficient sealing with the highest quality and exceptionally easy handling.

By developing new products and optimizing existing ones, RAMPF ensures the toughest demands in terms of seal quality, sealing geometries, and mechanical, thermal, and chemical resilience are always met.

What’s more, processing properties such as reactivity, viscosity, and color can be tailored to customer requirements.


Your key benefits

Many years of experience in product development and processing technology


Perfect sealing thanks to automatic application of the liquid gasket


ISO/TS 16949 and ISO 14001 certification


Economic benefits thanks to accelerated and simplified production and assembly processes


Used by leading manufacturers for both indoor and outdoor applications, including in the automotive and electronics industries


Reliable and lasting tightness – the gasket is firmly attached to the component and cannot be removed


Reduced noise and vibration


No tool costs; flexible adaptation to modified components using NC technology


Application images

Material types for sealing systems –
polyurethane or silicone?

Choosing the most suitable sealing material is a decision based on

  • Area of application
  • Customer-specific chemical requirements
  • Processing procedure

Polyurethan Schaumdichtung



  • Temperaturfestigkeit: langzeitig von -40 bis +100 °C, kurzzeitig: +140 °C
  • Chemische Beständigkeit gegen Fette und Öle, Waschmittel, wässrige Lösungen u. v. m.


  • Beste physikalische Eigenschaften wie Druckverformungsrest, Zugfestigkeit, Reißdehnung u. v. m.
  • Geringe Wasseraufnahme
  • UV-beständige Formulierungen möglich


  • Exzellente Haftung auf zahlreichen Trägermaterialien
  • Abgestimmte Vorbehandlungssysteme verfügbar


  • Komprimierungsrate: 30 – 60 %


  • UL 94, FMVSS 302



Silikon Schaumdichtung



  • Temperaturfestigkeit: langzeitig von -60 bis +200 °C, kurzzeitig: +300 °C
  • Sehr gute chemische Beständigkeit für extreme Umgebungen


  • Beste physikalische Eigenschaften (z. B. Druckverformungsrest)  über den gesamten Anwendungstemperaturbereich
  • Extrem wasserabweisend
  • Sehr gute  UV- Beständigkeit


  • Exzellente Haftung auf vielen Trägermaterialien
  • Bei Bedarf mit vorheriger Vorbehandlung


  • Komprimierungsrate: 10 – 30 %


  • UL 94 FMVSS 302



We support you with your processes – from original idea to finished product.
We’re always there for you – with production sites on three continents and sales partners worldwid