Gaskets: Cuts installation time in half. Adhesive-backed gasket material helps prevent breaking of water outlet. Gasket cement is not needed. Approved for Marine Applications. Self-adhesive backing holds thermostat in place while water outlet is being installed. Rubber thermostat seals also available. Seals: Fits securely around thermostat valve to prevent leakage. Approved for Marine Applications. Corrosion-resistant steel construction. Specially constructed to assure accurate fit.