Do you know what make of cable it is ???
They are ACS. Replacement seals are available from Spruce. Common problem. I covered mine with some firesleeve.
I'll post part numbers when I get home.
EDIT*** The big one in the OPs picture is part #05-02633. The smaller one closer to the end of the cable at the left is # 05-02634.
Like the fellows below said, the new ones are blue. *****