UNITED STATES SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 11-K

(Mark One):

þ		ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended: December 31, 2005

o		TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                      to                     

Commission file number 1-14187

     A. Full title of the plan and the address of the plan, if different from that of the issuer named below: RPM International Inc. Union 401(k) Trust and Plan, as amended

     B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office: RPM International Inc. 2628 Pearl Road, P.O. Box 777, Medina, Ohio 44258

 

 

TABLE OF CONTENTS

INDEPENDENT AUDITOR’S REPORT

SIGNATURES

EXHIBIT INDEX

EX-23.1 Consent of SS&G Financial Services, Inc.

RPM INTERNATIONAL INC. UNION 401(K)
TRUST AND PLAN

FINANCIAL STATEMENTS

DECEMBER 31, 2005

Independent Auditor’s Report

RPM International Inc. Audit Committee
RPM International Inc. Union 401(k) Trust and Plan

We have audited the accompanying statements of net assets available for benefits (modified cash basis) of the RPM International Inc. Union 401(k) Trust and Plan as of December 31, 2005 and 2004, the related statement of changes in net assets available for benefits (modified cash basis) for the year ended December 31, 2005, and the supplemental schedule of assets (held at end of year) as of December 31, 2005. These financial statements and supplemental schedule are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements and supplemental schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

As described in Note A, these financial statements and supplemental schedule were prepared on a modified cash basis of accounting, which is a comprehensive basis of accounting other than generally accepted accounting principles.

In our opinion, the financial statements and supplemental schedule referred to above present fairly, in all material respects, the net assets available for benefits of the RPM International Inc. Union 401(k) Trust and Plan as of December 31, 2005 and 2004, and the changes in net assets available for benefits for the year ended December 31, 2005, on the basis of accounting described in Note A.

/s/ SS&G Financial Services, Inc.
CERTIFIED PUBLIC ACCOUNTANTS

Cleveland, Ohio
June 9, 2006

RPM INTERNATIONAL INC. UNION 401(K) TRUST AND PLAN
STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
(MODIFIED CASH BASIS)
DECEMBER 31, 2005 AND 2004

		2005				2004
ASSETS
Investments		$	2,338,690			$	2,171,900
Receivables
Employer’s contribution			8,008				7,142
Participants’ contributions			22,457				18,160
			30,465				25,302
NET ASSETS AVAILABLE FOR BENEFITS		$	2,369,155			$	2,197,202

(See notes to financial statements.)

RPM INTERNATIONAL INC. UNION 401(K) TRUST AND PLAN
STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
(MODIFIED CASH BASIS)
YEAR ENDED DECEMBER 31, 2005

ADDITIONS TO NET ASSETS ATTRIBUTED TO:
Contributions
Participants		$	210,779
Employer			78,642			$	289,421
Investment income
Interest and dividends			38,770
Realized and unrealized gain on investments			76,218				114,988
Total Additions							404,409
DEDUCTIONS FROM NET ASSETS ATTRIBUTED TO:
Benefits paid to participants			229,641
Administrative expenses			2,815				232,456
Change in net assets							171,953
Net assets available for benefits:
Beginning of year						$	2,197,202
End of year						$	2,369,155

(See notes to financial statements.)

RPM INTERNATIONAL INC. UNION 401(K) TRUST AND PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 2005

NOTE A — SIGNIFICANT ACCOUNTING POLICIES

Basis of accounting

The Plan’s policy is to prepare its financial statements on the modified cash basis of accounting. Contributions are recorded on the accrual basis, dividends are recorded on the ex-dividend date, and other revenues are recognized when received rather than when promised or earned. Certain expenses and purchases of assets are recognized when cash is disbursed rather than when the obligation is incurred.

Investment valuation and income recognition

Investments are stated at fair value as determined by the custodian. Shares of registered investment companies are valued at quoted market prices which represent the net asset value of shares held by the plan at year-end. Collective investment funds are valued at their last reported net asset value. Participant loans are valued at their outstanding balances which approximates fair value.

Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded when received. Dividends are recorded on the ex-dividend date.

Contributions

Contributions are recorded on an accrual basis.

Payment of benefits

Benefits are recorded when paid.

Use of estimates

The preparation of financial statements, in conformity with the modified cash basis of accounting, requires management to make estimates and assumptions that affect the reported amount of assets, liabilities and changes therein, and disclosure of contingent assets and liabilities. Actual results could differ from those estimates.

NOTE B — DESCRIPTION OF THE PLAN

The following description of the Plan provides only general information. Participants should refer to the Plan document for a more complete description of the Plan’s provisions.

General

The Plan, adopted on February 1, 1997, is a defined contribution savings plan covering certain union employees at several wholly-owned domestic subsidiaries of RPM International Inc. (the Company).

The Plan is subject to the Employee Retirement Income Security Act of 1974 (ERISA).

Contributions

Each year, participants may contribute up to 20% of pretax annual compensation, as defined in the Plan. Participants who have attained age 50 before the end of the plan year are eligible to make catch-up contributions. Participants may also contribute amounts representing distributions from other qualified defined benefit or defined contribution plans. Participants direct the investment of their contributions into various investment options offered by the Plan. The Plan currently offers sixteen investment funds as investment options for participants. The Company matches, depending upon the collective bargaining agreement of each participating union, up to a maximum rate of 100% of the first 3% and 50% of the next 2% of employee deferrals. The matching Company contribution is invested in the same manner in which the participants invest their own contributions. Contributions are subject to certain limitations.

Participant accounts

Each participant’s account is credited with the participant’s contribution, the Company’s matching contribution and an allocation of Plan earnings and charged with an allocation of administrative expenses. Allocations are based on participant earnings or account balances, as defined. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested account.

Vesting

Vesting is immediate for contributions, both employee and employer, and earnings thereon.

Participant loans

Participants may borrow from their fund accounts a minimum of $1,000 up to a maximum equal to the lesser of $50,000 or 50% of their vested account balance. The loans are secured by the balance in the participant’s account and bear interest at rates that range from 5.0% to 10.5%. Principal and interest are paid ratably through payroll deductions.

Payment of benefits

On termination of service due to death, disability, or retirement, a participant generally will receive a lump-sum amount equal to the value of the participant’s vested interest in his or her account. For termination of service for other reasons, a participant may receive the value of the vested interest in his or her account as a lump-sum distribution.

Plan expenses

During 2005, the administrative expenses, audit fees, certain legal expenses, brokerage fees, transfer taxes, and other expenses incurred in connection with the sale, purchase, and management of the assets of the investment funds were paid by the Company.

NOTE C — INVESTMENTS

The following presents investments at December 31, 2005 and 2004 that represent 5% or more of the Plan’s net assets:

		2005				2004
Stable Portfolio Group Trust		$	667,524			$	590,984
RPM International Inc. Stock Fund			241,395				291,095
Janus Balanced Fund			223,843				190,937
Growth Fund of America			213,826				211,855
Fidelity Contra Fund			182,477				200,259
Fidelity Advisor Government Investment Fund			167,760				153,285
American Washington Mutual Investment Fund			163,846				144,394
Participant loans			126,246				123,035

During 2005, the Plan’s investments (including gains and losses on investments bought and sold, as well as held during the year) appreciated in value by $76,218.

Mutual Funds		$	46,704
Common/Collective Trust			29,514
		$	76,218

NOTE D — PLAN TERMINATION

Although it has not expressed any intent to do so, the Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. In the event of Plan termination, participants will become 100% vested in their accounts. Any unallocated assets of the Plan shall be allocated to participant accounts and distributed in such a manner as the Company may determine.

NOTE E — INCOME TAX STATUS

The Plan obtained its latest determination letter on November 13, 2002, in which the Internal Revenue Service stated that the plan, as then designed, was in compliance with the applicable requirements of the Internal Revenue Code. The plan has been amended since receiving the determination letter. However, the plan administrator and the plan’s tax counsel believe that the plan is currently designed and being operated in compliance with the applicable requirements of the Internal Revenue Code. Therefore, no provision for income taxes has been included in the Plan’s financial statements.

NOTE F — RELATED PARTY TRANSACTIONS

The Stable Portfolio Group Trust and the Enhanced Stock Market Fund are common trust funds managed by Wachovia Bank N.A. The value of the Stable Portfolio Group Trust was $667,524 and $590,984 at December 31, 2005 and 2004, respectively. The value of the Enhanced Stock Market Fund was $91,831 and $69,253 at December 31, 2005 and 2004, respectively. Wachovia Bank N.A. is the trustee as defined by the Plan and, therefore, these transactions qualify as party-in-interest transactions. Fees paid by the Plan for trustee and investment management services amounted to $2,815 for the year ended December 31, 2005.

NOTE G — RISKS AND UNCERTAINTIES

The Plan invests in various investment securities. Investment securities are exposed to various risks such as interest rate, market, and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants’ account balances and the amounts reported in the statement of net assets available for benefits.

RPM INTERNATIONAL INC. UNION 401(K) TRUST AND PLAN
SCHEDULE OF ASSETS (HELD AT END OF YEAR)
DECEMBER 31, 2005

FEDERAL ID #34-6550857 PLAN 007

Schedule H — Line 4i — Schedule of Assets (Held at End of Year)

(a)		(b)		(c)				(e)
				Description of investment
				including				Current value
		Identity of issue, borrower,		maturity date, rate of interest,				at
		lessor, or similar party		collateral, par or maturity value				December 31, 2005
*		Wachovia Bank, N.A., Stable Portfolio Group Trust		Collective investment fund				$	667,524
*		Wachovia Bank, N.A., Enhanced Stock Market Fund		Collective investment fund					91,831
		Fidelity Advisor Mid Cap Fund		Registered investment company					72,773
		Fidelity Contrafund		Registered investment company					182,477
		Growth Fund of America		Registered investment company					213,826
		Neuberger & Berman Genesis Fund		Registered investment company					31,549
		Washington Mutual Investors Fund		Registered investment company					163,846
		American Europacific Growth Fund		Registered investment company					4,073
		Templeton Foreign Fund		Registered investment company					90,518
		Janus Balanced Fund		Registered investment company					223,843
		Evergreen Core Bond Fund		Registered investment company					9,457
		Fidelity Advisors Government Investment Fund		Registered investment company					167,760
*		RPM International Stock Fund		Company stock					241,395
		RPM International Conservative Fund		Registered investment company					1,359
		RPM International Moderate Fund		Registered investment company					26,266
		RPM International Growth Fund		Registered investment company					23,947
*		Participant Loans		Loans (5.00% to 10.50%)					126,246
		Total Investments						$	2,338,690

SIGNATURES

     The Plan. Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

		RPM INTERNATIONAL INC. UNION 401(k) TRUST AND PLAN

		By: RPM International Inc. (Plan Administrator)
		/s/ Janeen Kastner
		Janeen Kastner, Director of Human Resources and Administration

Date: June 27, 2006

EXHIBIT INDEX

23.1

Consent of SS&G Financial Services, Inc.