EXHIBIT 10(f)(i)

                                CABOT CORPORATION

                     COMPENSATION FOR NON-EMPLOYEE DIRECTORS

                             AS OF DECEMBER 13, 2005

On January 10, 2003, the Board of Directors of Cabot Corporation ("Cabot")
approved the compensation outlined below for Cabot's non-employee directors,
effective April 1, 2003. There have not been any changes in these arrangements
since that time.

- -     An annual cash retainer of $20,000, payable quarterly in equal
      installments of $5,000.

- -     A per meeting fee of $1,700 for attending each Board meeting and each
      meeting of a Committee of which a director is a member.

- -     An annual fee of $10,000, payable quarterly in equal installments, for
      serving as chair of the Audit Committee.

- -     An annual fee of $4,000, payable quarterly in equal installments, for
      serving as Chair of any Committee of the Board other than the Audit
      Committee.

The standard compensation arrangements for non-employee directors also have
included an annual grant of 2,000 shares of Cabot common stock issued under
Cabot's Non-Employee Directors' Stock Compensation Plan. Cabot was not able to
issue stock pursuant to this plan in 2005. Accordingly, all non-employee
directors, other than Messrs. Enriquez-Cabot and McCance received a cash payment
of $65,000. Messrs. Enriquez-Cabot and McCance, who were elected as directors in
March 2005, received a pro-rated cash payment of $32,500.

Directors also are reimbursed for travel expenses incurred for attending Board
and Committee meetings and are covered by Cabot's travel accident insurance
policy for such travel.