Guar gum was one of the first polymers used to provide viscosity to water for fracturing applications. Guar gum comes from the endosperm of guar beans, the beans are processed to separate the endosperm (splits) from the bean hull and Protein. The splits are further flaked and ground into powder which is used in the fracturing fluids cross-linking system.
Guar gum fluids are compatible with both freshwater, saline and reproduced water, making them much more stable in all environments provided pH is controlled to ensure cross-linking of the fluid.