The present invention relates to a sealing element (1) suitable for using in cooking devices, especially counter-top cooktops, preventing the liquids spilled onto the panel (P) from leaking through the aperture (A) by providing leak-proofing of the apertures (A) wherein the knobs (K) placed onto the panel (P) are mounted and comprising a gasket (2) seated all around the edge of the aperture (A) on the upper surface of the panel (P) and produced from elastic material, and also relates to the cooking device wherein the sealing element (1) is used.