**EXHIBIT 24**

 

 

POWEROF ATTORNEY

 

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as his trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 
|   |   | /s/ John F. Akers |
|--------|--------|-------------------|
|   |   | John F. Akers     |
|   |   |              |

 

 

Dated:  February 28, 2008

 

 

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POWEROF ATTORNEY

 

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as his trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 
|   | /s/ H. Furlong  Baldwin |
|--------|-------------------------|
|   | H. Furlong  Baldwin     |
|   |                    |

 

 

# Dated:  February 28, 2008

 

 

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POWEROF ATTORNEY

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as his trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 
|   | /s/ Ronald C. Cambre |
|--------|----------------------|
|   | Ronald C. Cambre     |
|   |                 |

 

 

Dated:  February 28, 2008

 

 

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POWEROF ATTORNEY

 

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as her trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 

 
|   | /s/ Marye Anne Fox |
|--------|--------------------|
|   | Marye Anne Fox     |

 

 

Dated:  February 28, 2008

 

 

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POWEROF ATTORNEY

 

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as his trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 

 
|   | /s/ John J.  Murphy |
|--------|---------------------|
|   | John J. Murphy      |

 

 

 

Dated:  February 28, 2008

 

 

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POWEROF ATTORNEY

 

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as his trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 

 
|   | /s/ Paul J.  Norris |
|--------|---------------------|
|   | Paul J. Norris      |

 

 

 

Dated:  February 28, 2008

 

 

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POWEROF ATTORNEY

 

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as his trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 

 
|   | /s/ Christopher  J. Steffen |
|--------|-----------------------------|
|   | Christopher J.  Steffen     |

 

 

 

Dated:  February 28, 2008

 

 

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POWEROF ATTORNEY

 

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as his trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 

 
|   | /s/ Mark E.  Tomkins |
|--------|----------------------|
|   | Mark E. Tomkins      |

 

 

 

Dated:  February 28, 2008

 

 

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POWEROF ATTORNEY

 

 

The undersigned herebyappoints ROBERT M. TAROLA, MARK A. SHELNITZ, and MICHAEL W. CONRON as his trueand lawful attorneys-in-fact for the purpose of signing the Annual Report on Form 10-Kof W. R. GRACE & CO. for the year ended December 31, 2007, andall amendments thereto, to be filed with the Securities and ExchangeCommission.  Each of suchattorneys-in-fact is appointed with full power to act without the other.

 

 

 

 

 
|   |   | /s/ Thomas A.  Vanderslice |
|--------|--------|----------------------------|
|   |   | Thomas  A. Vanderslice     |

 

 

 

Dated:  February 28, 2008

 

 

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