A fluororubber composition having 10 to 60 parts by weight of wollastonite with an aspect ratio of 7 to 15 and 2 to 20 parts by weight of diatomaceous earth based on 100 parts by weight of fluororubber with a hardness Hs of 75 to 85. The fluororubber composition can be suitably used as a vulcanization molding material of an oil seal for both forward and reverse rotation that can maintain good fluid sealing in both forward and reverse operation even under high operating environment temperatures (e.g., 100 to 200 C.) and high rotational speeds (e.g., 8,000 to 15,000 rpm).