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Thomas Paulson Senior VP, CFO 763-540-1204 701 N. Lilac Drive
Minneapolis, Minnesota 55422
Kathryn Lovik Director, Communications 763.540.1212

Board of Directors

Azita Arvani,, 54, Director Since 2012, , Head of Innovation Partner & Venture Management for Nokia Networks

Member of the Compensation, Executive and Governance Committees.

Ms. Arvani, through her work with Nokia Networks, brings extensive experience in disruptive technologies. As a consultant and executive leader, she has helped a diverse set of companies develop and commercialize game-changing technologies. Her experience in new technologies is particularly valuable as we evolve our Orbio® water-based and other sustainable cleaning technologies.

William F. Austen ,, 58, Director Since 2007, , President and Chief Executive Officer of Bemis Company, Inc.

Member of the Audit, Compensation and Executive Committees.

Mr. Austen brings a broad strategic perspective as the top leader at Bemis Company where he serves as President and Chief Executive Officer. He is a talented leader in global manufacturing and operations with experience in global mergers, acquisitions and business integration. This experience is relevant to our business due to our international operations and growth initiatives.

Carol S. Eicher,, 58, Director Since 2008, , Non-Executive Chairman of Innocor, Inc.

Chair of the Governance Committee, member of the Compensation and Executive Committees.

Ms. Eicher brings a wealth of global manufacturing, operations and merger and acquisition experience from her senior leadership positions at Innocor Inc., The Dow Chemical Company, Rohm and Haas Company, Ashland Chemical Company and E.I. DuPont de Nemours and Company, Inc. In these positions she has led expansion efforts in developing countries and can provide insights as to the issues we may face as we expand our presence in Brazil, China and other developing countries

H. Chris Killingstad ,, 61, Director Since 2005, , President and Chief Executive Officer of Tennant Company

Mr. Killingstad, our President and CEO, through his work with General Electric, PepsiCo Inc. and The Pillsbury Company, as well as with the Company, has led global expansion and turnaround efforts and has developed expertise in the areas of product innovation, brand marketing and building strong leadership teams. He has also developed and grown startup enterprises within a corporate environment, a skill that he is applying to our water-based and other sustainable cleaning technologies business expansion.

Donal L. Mulligan,, 56, Director Since 2009, , Executive Vice President and Chief Financial Officer of General Mills, Inc.

Chair of the Audit Committee, member of the Executive and Governance Committees.

Mr. Mulligan is the Executive Vice President and Chief Financial Officer for General Mills, Inc. He was selected by the Board not only because of his financial expertise and his various senior financial and operations leadership positions at large multinational public companies, but also because of his knowledge in developing, marketing and branding innovative products, which is particularly relevant to our business, which involves the regular introduction of new and innovative products to the market.

Steven A. Sonnenberg ,, 64, Director Since 2005, Lead Director Since 2016, , Chairman of Emerson Automation Solutions

Lead Director, member of the Audit, Executive and Governance Committees.

Mr. Sonnenberg is an expert in global sales, operations and expansion. His leadership roles with Emerson Electric Company and its various divisions have helped him acquire a specific expertise in process improvement, grounded in systems and metrics that is critical to successful, scalable growth and expansion, which applies directly to our process improvement and growth initiatives. His experience with global acquisitions, joint ventures and expertise in emerging markets is also very valuable as we grow our global business.

David S. Wichmann,, 54, Director Since 2009, , CEO of UnitedHealth Group, Inc.

Member of the Audit, Compensation and Executive Committees.

Mr. Wichmann was selected by the Board for his global financial and operations expertise. In addition to being a seasoned senior executive with UnitedHealth Group Incorporated, he has experience across multiple businesses through his early consulting practice with Arthur Andersen and as Chief Financial Officer of a company in the same business segment as our Company. His understanding of business processes, finance, accounting and internal controls adds further discipline to our growth initiatives.

David Windley ,, 53, Director Since 2016, , President of IQTalent Partners

Chair of the Compensation Committee, member of the Executive Committee.

Mr. Windley has extensive global human resources management, succession planning and executive compensation expertise from his executive roles with IQTalent Partners, Fusion-io, Inc., Yahoo! Inc. and Microsoft Corporation. His experience with leading technologies will be particularly valuable as we expand how we use digital technology in our products and in our go-to-market initiatives.

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