JCS are able to offer an extensive selection of radiation shielding for neutron, gamma and X-ray fields. These materials can be supplied in sheets, rods, pellets, flexible sheets, field castable kits and even pre moulded to your specifications (where relevant). We are also able to offer a machining service for appropriate materials.

JCS are pleased to announce a new low-cost range of engineering grade neutron shielding including pure and boron loaded polyethylene. With standard sizes up to 6m x 2m x 100mm and total elemental boron loading of 5%. Our new sheets are easily machined and cost-effective for all neutron shielding applications.

Pure Polyethylene Neutron Shielding

JCPEP is a pure, high molecular weight, polyethylene neutron shielding, frequently used as a moderator where it is desired to slow fast neutrons down to… more

Key Properties

  • Used to thermalise fast neutrons
  • Very high hydrogen content
  • An excellent neutron moderator
  • Can be supplied as shielding kits

5% Borated Polyethylene

JCPE5 is a 5% boron loaded polyethylene neutron shield – HMW grade. Specifically developed for neutron shielding purposes in nuclear installations; its optimal boron content… more

Key Properties

  • High hydrogen content
  • Excellent attenuation of thermal neutrons
  • Can be supplied as shielding kits
  • Other boron loadings available

Self-Extinguishing Borated Polyethylene

Self-Extinguishing Borated Polyethylene is used for neutron shielding applications where flame resistance is necessary or desired for the installation. Self-extinguishing materials are desirable for use… more

Key Properties

  • Self-extinguishing shielding
  • JC207HD: 0.9% boron & 6% hydrogen
  • JC207HD5: 5.5% boron & 5.7% hydrogen

Lithium Polyethylene

Gamma-sensitive radiation detectors used in the vicinity of reactors or other neutron sources must be shielded from capture-gamma rays. These gammas arise from capture of… more

Key Properties

  • Shield detectors in neutron fields
  • Does not emit capture gamma
  • Shields using enriched lithium 6
  • High hydrogen content with 7.5% lithium

Borated Flex-Panel

JC227ATH Borated Flexi-Panel is an improved version of the discontinued JC227A. The standard thickness has been increased to 5/16” (0.31”), which provides the same amount… more

Key Properties

  • Inexpensive flexible material
  • Useful for facility upgrades
  • Ideal for use on walls or in doors
  • Easily handled & installed by non-specialised personnel

Flex-Boron Sheet

JC238 Flex-Boron is a flexible neutron shielding material useful for shielding irregular shapes as well as for being adhered to large straight or curved vertical… more

Key Properties

  • High temp shielding material
  • Contains 25% boron by weight
  • Useful for shielding irregular shapes
  • Easily cut to size with utility knife


JC237 Boron-Silicone is a fire & heat-resistant, field-castable neutron shielding material. It is silicone elastomer-based and has a high hydrogen content. At temperatures up to… more

Key Properties

  • Fire & heat-resistant
  • High hydrogen content
  • Field-castable shielding
  • Available as custom-made pre-cast pieces

High Temp Silicon

JC237-0 neutron moderator is a fire and heat resistant field-castable neutron shielding material. It is silicone elastomer-based and has a high hydrogen content. At temperatures… more

Key Properties

  • Excellent field castable moderator
  • Fire & heat-resistant material
  • Self-extinguishing material
  • Pre-cast custom shapes available

PolyCast Neutron Shield

Providing excellent, low-cost neutron shielding, PolyCast is a dry mix material designed to be cast into closed containers. It is field castable, with a hydrogen… more

Key Properties

  • Excellent, low-cost neutron shielding
  • Hydrogen content 6% > water
  • Field castable without special tools
  • Requires only water for mixing

Castable Reactor Shielding

JC277 & JC277-5 are excellent high flux neutron shields for power reactor and other industrial neutron shielding applications. Power reactor and other industrial neutron shielding… more

Key Properties

  • Rugged “concrete-like” shielding
  • Boron loadings from 1.6% to 5%
  • Completely non-combustible
  • > 2x hydrogen content as concrete

Neutron Putty

JC261 Neutron Putty can be used for the collimation of neutrons and for plugging neutron shine paths. JC261 is a non-hardening boron loaded LDPE putty… more

Key Properties

  • Non-hardening boron loaded putty
  • Contains 10% boron
  • High hydrogen content
  • Neutron attenuation factor of approx. 105
Get in touch with The JCS team