FlexShield (Lead Shielding Alternative)

“… FlexShield lead alternative offers effective radiation protection wherever it is needed.”

FlexShieldFlexShield is made up of a flexible tungsten impregnated silicone. Used for hot spots our alpha, beta, gamma and neutron shielding comes in a variety of custom shapes for use in many hard to shield applications. It is non-toxic, easy to work with and the lightest shielding available. FlexShield products include sheets, tapes, flooring and are available as a custom mold. Engineering and drafting support is available for requests. Necessity is the mother of invention and new products such as our magnetic product line are being developed daily.


  • Reactor Face Shielding
  • Piping Hot Spots
  • Lead Blanket Replacement
  • Scaffold Shielding
  • Source Shielding Barriers


  • Non-toxic – no mixed waste
  • Superior shielding properties
  • Lightest shielding available
  • Approximately 4.5 lbs/ft2 of FlexShield is equalto 10 lbs/ft2 of lead wool
  • .5” equal to an HVL and 1.2” to 2” equal to a TVL
  • Small pipe shielding – less than 1”
  • Fully customizable
  • Does not require re-sealing
  • Easy to work with – trim, cut, abrade, drill, punch
  • Highly resistant to physical abuse including puncture
  • Material can be cut using a knife or sharp scissors
  • Very good abrasion and tear resistance
  • Excellent conformability to wide variety of shapes
  • Highly resilient to boric acid and sodium hydroxide
  • Excellent chemical resistance at elevated temperatures
  • Operating temperature range -50oC to +250oC
  • Independent test reports available for a variety of isotopes
  • Several material blends available optimized to your requirements
  • Based on application, FlexShield may be installed as a permanent solution for 40+ years

Feel free to call the FlexShield engineering specialists at Marshield anytime for a consultation.