A method and an apparatus are provided for the production of heat-activable adhesive pellets that can be formed into elements for holding an article to a surface such as a glass surface. The apparatus and method for the manufacture of the heat-activable pellets include the steps of introducing at least a first component comprising at least one difunctional polymer with at least one multifunctional polymer into an extruder, heating the first component, introducing a second component comprising isocyanate and a powder flow enhancer (such as fumed silica) at a point downstream of the introduction of the first component, combining the first and second components in the extruder to form a flowable compound, pelletizing the extruded compound exiting the extruder by cutting to form heat-activable adhesive pellets, and drying the pellets. In one embodiment of the disclosed invention a catalyst is applied to the pellets to form catalyst-coated heat-activable adhesive pellets. In another embodiment of the disclosed invention a catalyst is added into the extruder to form catalyst-containing heat-activable adhesive pellets.