Silicone rubber boot, with molded-in mounting nut, completely covers actuator. Units seal both switch and panel-cutout in which switch is mounted. Tolerant to sunlight, weather, salt-spray, ozone, most acids and cleaning solvents. Units RFI suffix are EMI shielded. Meet MIL-B-5423. UL recognized. CSA certified. These sealing boots for pushbutton actuated style circuit breakers are molded from a high tear strength siliconee rubber bonded to a built-in mounting nut. Each encloses the base of the protruding circuit breaker bushing and forms a watertight and dust-tight seal against the front panel surface.