Abstract: A device for application of liquid products, such as paints and the like, comprising a container holding the main quantity of the product and with a discharge opening therein, and an applicator roller. An elongate chamber is provided between the discharge opening and the applicator roller in a position beneath the roller and with a paint supply slot at its top wall. The roller is mounted in front of the container and above the chamber in a manner ensuring that the roller, when rotated, picks up a controlled amount of paint on its periphery. The device is equally suitable for painting vertical and horizontal surfaces. By tilting the device into various positions of inclination or by providing special means it is possible to control the amount of liquid to be picked up by the roller and also the speed of liquid outflow. Means are provided to allow use of applicator rollers of various kinds and having different circumferential dimensions.