UltraShell™ Lining System
Thames Water Ring Main (TWRM) Extension Brixton to Honor Oak and Coppermills (2008 – 2011)

UltraShell™ is a High-Performance Fibre Reinforced Cement Composite (HPFRCC) developed as a permanent lining in the underground environment that can be sprayed or cast in situ.

Exhibiting high ductility, energy absorption capability and toughness, UltraShell™ is an extremely ductile material able to absorb significant levels of strain, and is able to visibly flex or deform prior to failure, behaviour similar to that exhibited by most metals under tensile or bending stresses. Such behaviour ensures extremely tight crack control and high levels of water tightness.