A sealing reducing washer is formed from a metallic reducing washer having a front surface, a rear surface, an outer periphery, and an inner periphery with a pliable rim secured over the outer periphery of the metallic reducing washer, a portion of the rim circumferentially depending below the rear surface of the metallic reducing washer adjacent the outer periphery of the metallic reducing washer so as to form a weathertight seal against a surface of an electrical enclosure when the sealing reducing washer is secured to the enclosure, and a pliable toroid circumferentially positioned adjacent the inner periphery of the metallic reducing washer and extending circumferentially above the front surface of the metallic reducing washer in the region adjacent the inner periphery of the metallic reducing washer, the toroid dimensioned to form a weathertight seal with an electrical conduit or raceway.