TamSoil 195CF acts as a soil conditioner for various types of soils, especially silty sands through to sandy clays. The use of TamSoil 195CF results in the creation of temporary cohesion of the soil as well as a reduction in water permeability. TamSoil 195CF gives the soil a cohesive characteristic which is necessary for tunnel boring. The foam also provides an air cushion for the soil which compensates for any abrupt pressure changes at the tunnel face.