An apparatus for making hollow, form-in-place gaskets is disclosed. The apparatus includes a nozzle and a forming surface. The nozzle comprises an extrusion orifice for extruding a gasket onto the forming surface. The apparatus further includes means for the nozzle to separately communicate with an air supply and a liquid elastomer supply. The nozzle configuration maintains the separation between the supplied air and the supplied liquid elastomer proximate to the extrusion orifice.