"Gel Gasket®" is a patented special extrusion product in which the ultra-low hardness extruded material "HOTTY Gel" is co-molded with an elastomer. Using gel alone as a gasket is difficult due to its extremely low hardness, making installation and handling challenging. However, by co-molding it with an elastomer, it becomes easy to install and handle while retaining the gel's vibration damping and watertight properties. Various shapes can be produced. Its thermal properties remain stable, with no changes in hardness or adhesiveness across a wide temperature range from -30°C to 80°C.