Executive Director and Highest Accounting Executive

We have prudently examined the facts and figures in the above-mentioned
report. As the executive director and the highest accounting executive,
we declare the facts and figures as complete, accurate, truthful, not
misleading, or not inadequate in materiality– which may cause possible
damage to the bearer or buyer of the securities. In addition, we declare
that

1.  The financial statements and financial information, attached as
    parts of this annual information, present accurate and complete, in
    all material aspects, the financial position, result of operations,
    and cash flows of the Siam Cement Public Company Limited and
    subsidiaries.

2.  We are responsible for fine disclosure system to ensure that the
    Company has accurately and completely disclosed material information
    of the Company and subsidiaries as well as supervising the
    compliance of the system.

3.  We are responsible for good internal control and overseeing the
    conformity to such system. We informed the internal control
    evaluation as at February 22, 2006 to the auditors and the Audit
    Committee. The report included any shortcomings and major changes in
    the internal control system as well as any dishonesty that might
    affect the financial statements of the Company and subsidiaries.

In order to ensure the authenticity and the wholeness of all the said
documents endorsed by us, we instructed Mr. Anuwat Jongyindee to initial
each and every sheet of the document. Should any sheet of document be
without his initial, we will consider such sheet (or sheets) not
certified by us.

The Siam Cement Public Company Limited

  Name Position Signature

1.  Mr. Kan Trakulhoon President _______________

2.  Mr. Roongrote Rungsiyopash Executive Vice President _______________

Authorized Person

Mr. Anuwat Jongyindee Corporate Accounting Director _______________

Non-Executive Directors

We have prudently examined the facts and figures in the above-mentioned
report. As the directors of the Company, we declare the facts and
figures as complete, accurate, truthful, not misleading, or not
inadequate in materiality– which may cause possible damage to the bearer
or buyer of the securities.

In order to ensure the authenticity and the wholeness of all the said
documents endorsed by us, we instructed Mr. Anuwat Jongyindee to initial
each and every sheet of the document. Should any sheet of document be
without his initial, we will consider such sheet (or sheets) not
certified by us.

  The Siam Cement Public Company Limited

  Name Position Signature

1.  Mr. Chaovana NaSylvanta Chairman _______________

2.  Air Vice Marshal Kamthon Chairman of The _______________
    Sindhvananda Audit Committee

3.  Mr. Paron Israsena Director, The Audit Committee _______________

4.  Mr. Snoh Unakul Director _______________

5.  Mr. Sivavong Changkasiri Director, The Audit Committee
    _______________

6.  Mr. Sumet Tantivejkul Director, The Audit Committee _______________

Authorized Person

Mr. Anuwat Jongyindee Corporate Accounting Director _______________

  Non-executive Directors

We have prudently examined the facts and figures in the above-mentioned
report. As the directors of the Company, we declare the facts and
figures as complete, accurate, truthful, not misleading, or not
inadequate in materiality– which may cause possible damage to the bearer
or buyer of the securities.

In order to ensure the authenticity and the wholeness of all the said
documents endorsed by us, we instructed Mr. Anuwat Jongyindee to initial
each and every sheet of the document. Should any sheet of document be
without his initial, we will consider such sheet (or sheets) not
certified by us.

  The Siam Cement Public Company Limited

  Name Position Signature

7.  Mr. Yos Euarchukiati Director _______________

8.  Mr. Pricha Attavipach Director, The Audit Committee _______________

9.  Mr. Panas Simasathien Director _______________

10. Mr. Arsa Sarasin Director _______________

11. Mr. Boonsithi Chokwattana Director _______________

Authorized Person

Mr. Anuwat Jongyindee Corporate Accounting Director _______________