Information Sheet for telephone contacts with Kiewit Materials Company
             Stockholders by employees of Kiewit Materials Company
                        and/or Peter Kiewit Sons', Inc.

Kiewit Materials Company Stockholder:

-    By now you should have received two separate mailings from Jem Lear
     Acquisition Company, Inc., a subsidiary of Rinker Materials Corporation,
     relating to its offer to purchase all outstanding shares of Kiewit
     Materials Company (the "Company") at price of $17.00 per share, in cash.

-    As noted in those mailings, the offer to purchase expires on September 25,
     2002 and the purchase is contingent upon 90% of all the shares of the
     Company being tendered by that date.

-    Included in these mailings was a letter from Kenneth Stinson, Chairman of
     the Board of Directors of the Company, informing stockholders that the
     Board of Directors of the Company has unanimously approved the offer to
     purchase and unanimously recommended that stockholders accept the offer and
     tender their shares.

-    You should have also received a mailing from Peter Kiewit Sons', Inc.
     confirming your receipt of the prior mailings.

-    As noted in the mailings, in order to tender your shares, if you have not
     already done so, you must complete the blue Transmittal Letter included in
     the mailings and mail it to the depositary for the offer at the address set
     forth on the document, together with the certificates representing your
     shares.

     -    [For stockholders with pledged shares:

          -    If your shares are pledged to a bank or other lender and you wish
               to tender your shares, you must first contact the lender to
               arrange for the delivery of the certificate representing the
               shares to Jem Lear and provide the information requested on the
               blue Transmittal Letter. If the offer is completed, the
               depositary will pay the offer price ($17.00) to the lender, and
               the lender must represent to Jem Lear that upon payment of the
               offer price, the shares will be free and clear of any lien or
               other restriction imposed by the pledge.]

-    If you have not received any of the mailings, or if you have any questions
     regarding the tender offer process, including help in completing the blue
     Transmittal Letter, please call D.F. King & Co., Inc., Rinker's information
     agent for the tender offer, toll free at 800-549-6746. Alternatively, we
     can arrange to have them send you the materials or have them call you.





     Their address is as follows:

     D.F. KING & CO., INC.
     77 Water Street
     New York, New York 10005
     (212) 269-5550
     (800) 549-6746