ZEP INC. SEVERANCE AGREEMENT

Exhibit 10.18

ZEP INC.

SEVERANCE AGREEMENT

THIS AGREEMENT (the “Agreement”), made and entered into as of this          day of                      , 2007, by and between ZEP INC., a Delaware corporation (the “Company”), and                      (the “Executive”).

WITNESSETH:

WHEREAS , Executive is a key employee of the Company and an integral part of the Company’s management; and

WHEREAS , the Company desires to provide the Executive with certain benefits if the Executive’s employment is terminated involuntarily under certain circumstances; and

WHEREAS , the Company and the Executive have determined it is in their mutual best interests to enter into this Agreement;

NOW, THEREFORE , the parties hereby agree as follows:

Unless earlier terminated as hereinafter provided, this Agreement shall commence on the date hereof and shall be for a rolling, two-year term (the “Term”) and shall be deemed to extend automatically, without further action by either the Company or Executive, each day for an additional day, such that the remaining term of the Agreement shall continue to be two years; provided, however, that either party may, by written notice to the other, cause this Agreement to cease to extend automatically and, upon such notice, the “Term” of this Agreement shall be the two-year period following the date of such notice and this Agreement shall terminate upon the expiration of such Term; provided, further, that in the event of a Change in Control (as defined in Section 2.3 below), the Term of this Agreement shall not expire prior to the expiration of three (3) years after the occurrence of a Change in Control. This Agreement shall not be considered an employment agreement and in no way guarantees Executive the right to continue in the employment of the Company or its affiliates. Executive’s employment is considered employment at will, subject to Executive’s right to receive payments and benefits upon certain terminations of employment as provided below.

As of the date hereof, this Agreement is intended to, and shall, supersede and replace in its entirety the severance agreement, dated as of                      , and the severance obligations contained in any employment letter agreement between Executive and the Company (or a predecessor to the Company).

2.1 “ Board ” or “ Board of Directors ”. The Board of Directors of Zep Inc., or its successor.

2.2 “ Cause ”. The involuntary termination of Executive by the Company for the following reasons shall constitute a termination for Cause:

a. If termination shall have been the result of an act or acts by the Executive which have been found in an applicable court of law to constitute a felony (other than traffic-related offenses);

b. If termination shall have been the result of an act or acts by the Executive which are in the good faith judgment of the Company to be in violation of law or of written policies of the Company and which result in material injury to the Company;

c. If termination shall have been the result of an act or acts of dishonesty by the Executive resulting or intended to result directly or indirectly in gain or personal enrichment to the Executive at the expense of the Company; or

d. Upon the continued failure by the Executive substantially to perform the duties reasonably assigned to Executive given Executive’s training and experience (other than any such failure resulting from incapacity due to mental or physical illness not constituting a Disability, as defined herein), after a demand in writing for substantial performance of such duties is delivered by the Company, which demand specifically identifies the manner in which the Company believes that the Executive has not substantially performed his duties, and such failure results in material injury to the Company.

If Executive’s employment is terminated for any reason, the supervising executive to whom Executive directly reports (the “Supervising Executive”) shall make an initial determination whether or not the termination was for Cause. If the Supervising Executive determines that the termination was for Cause, then, within ten (10) days of such termination, the Company shall provide written notice to the Executive indicating that the termination was for Cause and noting that benefits will not be made available to the Executive pursuant to this Agreement.

2.3 “ Change in Control ”. For purposes of this Agreement, a “Change in Control” shall mean any of the following events:

a. The acquisition (other than from the Company in an acquisition that is approved by the Incumbent Board, as defined herein) by any “Person” (as the term person is used for purposes of Sections 13(d) or 14(d) of the Securities Exchange Act of 1934, as amended (the “1934 Act”), of beneficial ownership (within the meaning of Rule 13d-3 promulgated under the 1934 Act) of twenty percent (20%) or more of the combined voting power of the Company’s then outstanding voting securities; or

b. The individuals who, as of October 31, 2007, are members of the Board (the “Incumbent Board”), cease for any reason to constitute at least two-thirds of the Board; provided, however, that if the election, or nomination for election by the Company’s stockholders, of any new director was approved by a vote of at least two-thirds of the Incumbent Board, such new director shall, for purposes of this Agreement, be considered as a member of the Incumbent Board; or

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c. Consummation of a merger or consolidation involving the Company if the stockholders of the Company, immediately before such merger or consolidation do not, as a result of such merger or consolidation, own, directly or indirectly, more than sixty percent (60%) of the combined voting power of the then outstanding voting securities of the corporation resulting from such merger or consolidation in substantially the same proportion as their ownership of the combined voting power of the voting securities of the Company outstanding immediately before such merger or consolidation; or

d. Consummation of a complete liquidation or dissolution of the Company or of the sale or other disposition of all or substantially all of the assets of the Company.

Notwithstanding the foregoing, a Change in Control shall not be deemed to occur pursuant to Section 2.3, solely because twenty percent (20%) or more of the combined voting power of the Company’s then outstanding securities is acquired by (i) a trustee or other fiduciary holding securities under one or more employee benefit plans maintained by the Company or any of its subsidiaries or (ii) any corporation which, immediately prior to such acquisition, is owned directly or indirectly by the stockholders of the Company in the same proportion as their ownership of stock in the Company immediately prior to such acquisition.

2.4 “ Change in Control Agreement ”. An agreement between Executive and the Company providing for the payment of compensation and benefits to Executive in the event of Executive’s termination of employment under certain circumstances following a “change in control” of the Company (as defined in such agreement).

2.5 “ Company ”. Zep Inc., a Delaware corporation, or any successor to its business and/or assets.

2.6 “ Date of Termination ”. The date specified in the Notice of Termination (which may be immediate) as the date upon which the Executive’s employment with the Company is to cease.

2.7 “ Disability ”. Disability shall have the meaning ascribed to such term in the Company’s long-term disability plan covering the Executive, or in the absence of such plan, a meaning consistent with Section 22(e)(3) of the Code. The determination of Disability shall be made by the Company in a manner consistent with the requirements of Section 409A.

2.8 “ Good Reason ”. A “Good Reason” for termination by Executive of Executive’s employment with the Company shall mean the occurrence during the Term after the occurrence of a Change in Control, without Executive’s express consent, of any of the following acts by the Company, or failures by the Company to act, and such act or failure to act has not been corrected within thirty (30) days after written notice of such act, or failure to act, is given by Executive to the Company:

a. an adverse change in Executive’s title or position in the Company from Executive’s title or position immediately prior to the Change in Control which represents a demotion;

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b. the Company’s requiring Executive to be based more than 50 miles from the primary workplace where Executive is based immediately prior to the Change in Control, except for reasonably required travel on the Company’s business which is not significantly greater than such travel requirements prior to the Change in Control;

c. a reduction in base salary and target bonus opportunity (not the bonus actually earned) below the level in effect immediately prior to the Change in Control, unless such reduction is consistent with reductions being made at the same time for other officers of the Company in comparable positions;

d. a material reduction in the aggregate benefits provided to Executive by the Company under its “employee benefits plans,” as defined in Section 3(3) of ERISA, immediately prior to the Change in Control, except in connection with a reduction in such benefits which is consistent with reductions being made at the same time for other officers of the Company in comparable positions;

e. an insolvency or bankruptcy filing by the Company; or

f. a material breach by the Company of this Agreement.

2.9 “ Notice of Termination ”. A written notice from one party to the other party specifying the Date of Termination and which sets forth in reasonable detail the facts and circumstances relating to the basis for termination of Executive’s employment.

2.10 “ Section 409A ”. Section 409A of the Internal Revenue Code of 1986, as amended, and the regulations and rulings thereunder.

2.11 “ Severance Period ”. A period equal to the lesser of (i)                       months from the Executive’s Date of Termination or (ii) the number of months (rounded to the nearest month) from the Executive’s Date of Termination until the date he attains age 65.

This Agreement provides for the payment of compensation and benefits to Executive in the event his employment (i) is involuntarily terminated by the Company without Cause, or (ii) is terminated by Executive for Good Reason. If Executive is terminated by the Company for Cause, dies, incurs a Disability or voluntarily terminates employment (other than for Good Reason), this Agreement shall terminate, and Executive shall be entitled to no payments of compensation or benefits pursuant to the terms of this Agreement; provided that in such events, Executive will be entitled to whatever benefits are payable pursuant to the terms of any health, life insurance, disability, welfare, retirement, deferred compensation, or other plan or program maintained by the Company.

If, as a result of Executive’s termination of employment, Executive becomes entitled to compensation and benefits under this Agreement and under a Change in Control Agreement, Executive shall be entitled to receive benefits under whichever agreement provides Executive the greater aggregate compensation and benefits (and not under the other agreement) and there shall be no duplication of benefits.

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If Executive’s employment is involuntarily terminated by the Company during the term of this Agreement without Cause (and such termination does not arise as a result of Executive’s death or Disability), or if Executive terminates his employment for Good Reason, the Executive shall be entitled to the compensation and benefits described below, provided that Executive, as described in Section 4.7, executes a valid release of claims in such form as may be required by the Company. In the event Executive is terminated without Cause or Executive terminates his employment for Good Reason, the Company may, in its discretion and to provide equitable treatment, grant benefits to Executive in addition to those provided below in circumstances where Executive suffers a diminution of projected benefits as a result of Executive’s termination prior to attainment of age 65, including without limitation, additional retirement benefits, provided that any such grant of additional benefits shall be consistent with the requirements of Section 409A and no such grant shall be made which would violate Section 409A and the regulations and rulings thereunder.

4.1 Base Salary . Executive shall continue to receive his Base Salary (subject to withholding of all applicable taxes) for the entire Severance Period (as defined in Section 2.11 above), payable in the same manner as it was being paid on his Date of Termination.

4.2 Annual Bonus . Executive shall be paid a bonus in an amount equal to the greater of (i) the annual incentive bonus that would be paid or payable to Executive for the fiscal year of the Company during which Executive’s Date of Termination occurs under the Company’s annual incentive plan (“Incentive Plan”), assuming the target level(s) of performance had been met for such fiscal year, multiplied by a fraction (the “Pro Rata Fraction”), the numerator of which is the number of days that have elapsed in the then current fiscal year through Executive’s Date of Termination and the denominator of which is 365, or (ii) the annual incentive bonus that would be paid or payable to Executive for the fiscal year of the Company during which Executive’s Date of Termination occurs under the Incentive Plan based upon the Company’s actual performance for such fiscal year, multiplied by the Pro Rata Factor. The bonus amount determined pursuant to Section 4.2(i) shall be paid to Executive within ten (10) days of Executive’s Date of Termination and any additional amount payable pursuant to Section 4.2(ii) shall be payable at the same time as bonuses are payable to other executive under the Incentive Plan. In the event Executive becomes entitled to a bonus under this Section 4.2 and under the Incentive Plan in connection with a Change in Control, Executive shall be entitled to receive whichever bonus amount is greater and Executive shall not receive a duplicate bonus for the same fiscal year (or portion of a fiscal year).

4.3 Restricted Stock . Any Restricted Stock granted to Executive under the Acuity Brands, Inc. Long-Term Incentive Plan (“LTIP”) for which the specific performance targets have been achieved and a Vesting Start Date (as defined in the agreement granting the Restricted Stock to Executive, the “Restricted Stock Agreement”) has been established as of Executive’s Date of Termination shall become fully vested and nonforfeitable as of Executive’s Date of Termination and subject to the proviso at the end of this sentence, all Restricted Stock

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for which a Vesting Start Date has not been established shall be immediately forfeited; provided, that if the Restricted Stock Agreement granting the Restricted Stock to Executive provides for more favorable continued vesting after Executive’s Date of Termination, the provisions of such Restricted Stock Agreement shall apply to the vesting of Executive’s Restricted Stock after Executive’s termination. The Vested Value (as defined in the Restricted Stock Agreement) of the shares of Restricted Stock vesting pursuant to this Section 4.3 shall be delivered to Executive in the manner provided in Section 2.2 of the Restricted Stock Agreement within ten (10) days of Executive’s Date of Termination, using Executive’s Date of Termination as the date for determining the Vested Value. This Section 4.3 does not apply to Restricted Stock that only contains time-based vesting.

4.4 Health Care and Life Insurance . The health care (including dental and vision coverage, if applicable) and term life insurance coverages provided to Executive at his Date of Termination shall be continued at the same level as for active executives and in the same manner as if his employment had not terminated, beginning on the Date of Termination and ending on the last day of the Severance Period. Any additional coverages Executive had at termination, including dependent coverage, will also be continued for such period on the same terms, to the extent permitted by the applicable policies or contracts. Any costs Executive was paying for such coverages at the time of termination shall be paid by Executive by separate check payable to the Company each month in advance or, at Executive’s election, may be deducted from his Base Salary payments under Section 4.1. If the terms of the life insurance plan referred to in this Section 4.4, or the laws applicable to such plan, do not permit continued participation by Executive as required by this subsection, then the Company will arrange for other coverage satisfactory to Executive at the Company’s expense providing substantially identical benefits or, at the Company’s election, the Company will pay Executive an amount each month during the Severance Period equal to the costs to Executive for the coverage.

If the terms of the health care plan referred to in this Section 4.4 do not permit continued participation by Executive as required by this subsection or if the healthcare benefits to be provided to Executive and his dependents pursuant to this Section 4.4 cannot be provided in a manner such that the benefit payments will be tax-free to Executive and his dependents, then the Company shall (A) pay to Executive each month during the Severance Period after Executive’s Termination Date an amount equal to the monthly rate for COBRA coverage under the healthcare plan that is then being paid by former active employees for the level of coverage that applies to Executive and his dependents, minus the amount active employees are then paying for such coverage, and (B) permit Executive and his dependents to elect to participate in the healthcare plan for the Severance Period upon payment of the applicable rate for COBRA coverage during the Severance Period. A benefit provided under this Section 4.4 shall cease if Executive obtains other employment and, as a result of such employment, health care or life insurance benefits are available to Executive. At the end of the Severance Period, Executive shall be entitled to elect to continue health care coverage pursuant to the Consolidated Omnibus Budget Reconciliation Act of 1985, as amended (“COBRA”), for the period required by COBRA. In the event Executive’s employment is terminated following a Change in Control under circumstances that entitle the Executive to benefits under this Section 4.4, Executive shall be entitled to elect to continued