High-mol.-weight water-soluble polymers can be successfully incorporated into aqueous liquids without the formation of polymer aggregates by keeping the polymer particles separated until they are dispersed in the aqueous liquid This can be done by mech., chem., and phys. methods. A method that consistently gives good results under all conditions is the preparation of a liquid polymer suspension in a water-insoluble liquid Such suspensions should have a low viscosity and a high polymer concentration and should readily disperse in compatible aqueous liquids under low shear conditions, should exhibit no polymer settling, have no effect on the rate of hydration of the polymer, and should exhibit no appreciable viscosity increase on aging. Several com. liquid polymer suspensions contain 40-50% polymer solids in a diesel oil medium, and their properties are discussed.