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Medical Devices

SILPURAN® and ELASTOSIL® silicone elastomers have a special property profile that makes them ideal for medical applications. Three of the many good reasons for using this pure material are that it can be sterilized and offers both excellent chemical and physical resistance without the need for additional stabilizers.

Both SILPURAN® and ELASTOSIL® silicone elastomers from WACKER are the perfect solution for meeting the diverse, complex and highly sensitive requirements of medical-device applications.

Extrudable SILPURAN® solid silicone rubber is used in all kinds of pharmaceutical and medical tubes, e.g.:

  • Drainage, peristalsis and breathing tubes
  • Feeding tubes
  • Urinary catheters
  • Tubes for transferring liquids

SILPURAN® and ELASTOSIL® liquid and solid silicone rubbers are converted by injection or compression molding into:

  • Gaskets
  • Balloon catheters
  • Valves
  • Septa
  • Filters and membranes
  • Ventilation masks, resuscitator bags and pads
  • Instrument grips
  • Mats for sterilization trays
  • Medical products
  • Stoppers and plugs
  • Medical cables


Schematic diagram of an extruder fitted with crosshead die

This is a continuous manufacturing process whereby silicone rubber is forced through a die to shape it, and is then cured. The necessary pressure is produced by a conveying screw, in which the material is homogenized, compressed and vented. This is how medical and pharmaceutical tubing is made. SILPURAN® and ELASTOSIL® solid silicone rubber comes in blocks wrapped in antistatic foil and sealed inside a bag.

Injection Molding

Injection molding is currently the most popular and efficient method of producing large quantities of silicones in consistently high quality. SILPURAN® and ELASTOSIL® HTV and LSR silicone rubber compounds can be processed to gaskets, membranes and valves with this method. WACKER liquid silicone rubber is supplied as a two-part system (A/B) in 20 kg pails and 200 kg drums.

Mixing and Metering Equipment for Liquid Silicone Rubber