An end face seal especially adapted for use in severe service environments such as for sealing track pins or track rollers of crawler type tractors. The seal includes a primary annular seal ring, having a radially extending flange with a portion for contacting a mating surface on a machine part in face sealing engagement and an axially extending flange portion, as well as a secondary annular sealing ring positioned in use about the axial flange portion. The secondary seal ring includes an abradable auxiliary excluder lip that contacts a portion of the machine part with the mating surface so as to initially exclude grit from the seal band area of contact between the seal ring and the machine part.