A seal assembly (10, 110), comprising: an inner wear sleeve (14, 114) having a tubular body extending between axially opposite ends and mountable for rotation with a shaft, said sleeve (14, 114) having a flange extending radially outwardly from said body adjacent one of said ends to a radially outermost portion; an outer seal component (12, 112) having an outer wall for receipt in a housing with a flange (22, 122) extending radially inwardly from said outer wall, said flange (22, 122) supporting at least one dynamic seal having a seal lip in sealing engagement with said tubular body of said wear sleeve (14, 114), characterized in that said outer wall supporting an elastically resilient annular retention lip (40, 140) extending radially inwardly from said outer wall around the entire circumference of said outer wall to a radially inner most portion that is radially inward from said radially outermost portion of said flange (22, 122) of said inner wear sleeve (14, 114), said retention lip (40, 140) being axially deflectable to allow said flange (22, 122) of said inner wear sleeve (14, 114) to pass axially thereby during assembly and returning resiliently to a non-deflected state, said retention lip (40, 140) being spaced axially and out of engagement from said flange (22, 122) of said inner wear sleeve (14, 114) in said non-deflected state to provide a non-contact labyrinth passage extending radially and axially between said retention lip (40, 140) and said flange (22, 122) and having at least one expulsion opening extending radially outwardly into said radially inner most portion, said opening being open to said labyrinth passage (42, 142) to allow debris to escape from said labyrinth passage. an inner wear sleeve (14, 114) having a tubular body extending between axially opposite ends and mountable for rotation with a shaft, said sleeve (14, 114) having a flange extending radially outwardly from said body adjacent one of said ends to a radially outermost portion; an outer seal component (12, 112) having an outer wall for receipt in a housing with a flange (22, 122) extending radially inwardly from said outer wall, said flange (22, 122) supporting at least one dynamic seal having a seal lip in sealing engagement with said tubular body of said wear sleeve (14, 114), characterized in that said outer wall supporting an elastically resilient annular retention lip (40, 140) extending radially inwardly from said outer wall around the entire circumference of said outer wall to a radially inner most portion that is radially inward from said radially outermost portion of said flange (22, 122) of said inner wear sleeve (14, 114), said retention lip (40, 140) being axially deflectable to allow said flange (22, 122) of said inner wear sleeve (14, 114) to pass axially thereby during assembly and returning resiliently to a non-deflected state, said retention lip (40, 140) being spaced axially and out of engagement from said flange (22, 122) of said inner wear sleeve (14, 114) in said non-deflected state to provide a non-contact labyrinth passage extending radially and axially between said retention lip (40, 140) and said flange (22, 122) and having at least one expulsion opening extending radially outwardly into said radially inner most portion, said opening being open to said labyrinth passage (42, 142) to allow debris to escape from said labyrinth passage.