The document describes a patent for a device that seals fluid lubricant in the hub of a rotating wheel. The device consists of three parts: a metallic spacing ring, a resilient sealing ring, and a rigid spreading ring. The spacing ring spaces the wheel outward on the axle spindle. The resilient sealing ring has ridges and fins to seal against leakage. The rigid spreading ring holds the sealing ring tightly against the inside of the wheel hub as it rotates.