**Exhibit 24**

POWER OF ATTORNEY 

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes andappoints John K. Morgan and Mark R. Bachmann, and each of them individually, his true and lawful attorneys-in-fact (with full power of substitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director orofficer of Zep Inc., to file a registrant’s annual report on Form 10-K for the fiscal year ended August 31, 2007, and any and all amendments thereto, with any exhibits thereto, and other documents in connection therewith, with theSecurities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do and perform each and every act and thing requisite and necessary to be done in the premises, as fully to allintents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, or their substitutes, may lawfully do or cause to be done by virtue hereof. 

 

Dated: November 26, 2007 

 

POWER OF ATTORNEY 

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints John K. Morgan and Mark R. Bachmann, and each of them individually, his true and lawful attorneys-in-fact (with full power ofsubstitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of Zep Inc., to file a registrant’s annual report on Form 10-K for the fiscal year ended August 31, 2007, and any andall amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do andperform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, ortheir substitutes, may lawfully do or cause to be done by virtue hereof. 

 
/s/ Kenyon W. MurphyKenyon W. Murphy
Dated: November 26, 2007 

 

POWER OF ATTORNEY 

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints John K. Morgan and Mark R. Bachmann, and each of them individually, his true and lawful attorneys-in-fact (with full power ofsubstitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of Zep Inc., to file a registrant’s annual report on Form 10-K for the fiscal year ended August 31, 2007, and any andall amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do andperform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, ortheir substitutes, may lawfully do or cause to be done by virtue hereof. 

 
 /s/ Joseph Squicciarino Joseph Squicciarino
Dated: November 26, 2007 

 

POWER OF ATTORNEY 

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints John K. Morgan and Mark R. Bachmann, and each of them individually, his true and lawful attorneys-in-fact (with full power ofsubstitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of Zep Inc., to file a registrant’s annual report on Form 10-K for the fiscal year ended August 31, 2007, and any andall amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do andperform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, ortheir substitutes, may lawfully do or cause to be done by virtue hereof. 

 
 /s/ Sidney J. Nurkin Sidney J. Nurkin
Dated: November 26, 2007 

 

POWER OF ATTORNEY 

KNOW ALL MEN BY THESE PRESENTS, that the undersigned hereby constitutes and appoints John K. Morgan and Mark R. Bachmann, and each of them individually, his true and lawful attorneys-in-fact (with full power ofsubstitution and resubstitution) to act for him in his name, place, and stead in his capacity as a director or officer of Zep Inc., to file a registrant’s annual report on Form 10-K for the fiscal year ended August 31, 2007, and any andall amendments thereto, with any exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact, and each of them individually, full power and authority to do andperform each and every act and thing requisite and necessary to be done in the premises, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact or either of them, ortheir substitutes, may lawfully do or cause to be done by virtue hereof. 

 
 /s/ J. Veronica Biggins J. Veronica Biggins
Dated: November 26, 2007