Elastomers - Nuclear
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Materials Technology

Elastomers - Nuclear

James Walker has developed two ranges of Shieldseal® elastomers for use with ionising radiation. They are backed with evaluation results from specialist test houses and nuclear sector customers.

Shieldseal® 500: World-leading range of lead-free elastomers for shielding X-ray and gamma radiation. They are used where a resilient rubber-based seal is needed to prevent shine paths in active areas.

Shieldseal® 600: Elastomers that resist ionising radiation. Their change in physical properties has been monitored over time with gamma radiation to prove compression-set resistance and long service life.

Full Product Range

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Shieldseal® 551 - Radiation grade

Lead-free radiation shielding

  • Flexible & resilient polychloroprene-based material.
  • Effective shielding of X-ray and gamma radiation.
  • 2.4mm thickness has same shielding efficiency as 1mm of lead.
  • Maintains long-term sealing forces.
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Shieldseal® 561 - Radiation grade

Lead-free radiation shielding elastomer

  • Flexible & resilient ethylene-propylene based material.
  • Effective shielding of X-ray and gamma radiation.
  • 2.4mm thickness has same shielding efficiency as 1mm of lead.
  • Maintains long-term sealing forces.
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Shieldseal® 621 - Radiation grade

Nitrile elastomer for use with ionising radiation

  • Acrylonitrile-butadiene formulated for radiation resistance.
  • Excellent chemical resistance.
  • Resistant to wear and abraison.
  • Excellent value for money.
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Shieldseal® 641 - Radiation grade

Soft grade elastomer for use with ionising radiation

  • Fluoroelastomer with excellent radiation resistance.
  • Enhanced high temperature capability.
  • Soft grade for sealing duties at low closing forces.
  • Excellent value for money.
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Shieldseal® 661 - Radiation grade

Soft grade elastomer for use with ionising radiation

  • Ethylene-propylene with outstanding radiation resistance.
  • Soft grade material for efficient fluid sealing at low closing forces.
  • Low levels of the ions that promote metalwork corrosion.
  • Economically priced.
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Shieldseal® 662 - Radiation grade

Medium grade elastomer for use with ionising radiation

  • Ethylene-propylene with outstanding radiation resistance.
  • Medium hardness for general applications.
  • Low levels of the ions that promote metalwork corrosion.
  • Economically priced.
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Shieldseal® 663 - Radiation grade

PMUC approved material for use in French nuclear plant

  • Peroxide cured ethylene-propylene terpolymer.
  • Radiation/ageing tested for 40-year lifespan.
  • Strong resistance to short-term high pressure and temperature spikes.
  • Nominal 80 IRHD for general sealing applications.
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