Exhibit 23.3

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

• Registration Statement No. 333-112530 on Form S-3,

• Registration Statement No. 333-100558 on Form S-8,

• Registration Statement No. 333-88143 on Form S-8,

• Registration Statement No. 333-88145 on Form S-8,

• Registration Statement No. 333-34938 on Form S-8,

• Registration Statement No. 333-88587 on Form S-3,

• Post Effective Amendment No. 1 to Registration Statement No. 333-88143 on Form S-8,

• Post Effective Amendment No. 1 to Registration Statement No. 333-34938 on Form S-8,

• Amendment No. 1 to Registration Statement No. 333-112530 on Form S-3;

of our report dated March 20, 2008, with respect to the financial statements of CPPC-Decorative Products Co., Ltd., included in this Form 10-K/A (Amendment No. 1) of OMNOVA Solutions Inc. for the year ended November 30, 2007.

/s/ Ernst & Young Office Limited

Bangkok, Thailand

March 20, 2008