Abstract: A method of and a device for proportioning at least one viscous substance and specifically the components of viscous polycomponent mixtures, wherein each component is charged into respective squeezing unit and delivered into a mixing and discharge unit in a subsequent squeezing operation.The inventive aspect of the method and the inventive device is characterized by the fact that the pressure in the squeezing unit is adapted to the operating pressure in the mixing and discharge unit prior to the squeezing operation.