This small silicone tube avoids replace the entire furnace when the inner door glass eventually take off, either because of the age of the device or because of improper manipulation (push the gate, closing the door eg ....). Once we found a way to remove the door (Youtube is your friend for that), the replacement of the glass is simple and fast. The silicon contained in the tube is simple to unmold cord, be careful however not to put glue everywhere because it terribly! Also provide power to flatten the oven door during a couple of hours with a load on the glass to achieve a perfect bonding. Beware handles and other decorations that make for overhang and put the door in torsion, preventing a uniform support of the glass. And finally, allow 5-load running of the oven after drying to remove the smell of silicone! Do not imagine being able to cook something immediately, otherwise the taste of food may be a bit unusual: D