ECert - 2023-09-26T122339.151.pdf Page 1 of 10 Validity of this certificate is based on the successful completion of the periodic surveillance audits of the management system defined by the above scope and is contingent upon prompt,written notification to ABS Quality Evaluations, Inc. of significant changes to the management system or components thereof.

Special items include charges related to specific strategic initiatives or financial restructuring such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting from personnel reduction programs, plant realignment costs, executive separation agreements; asset impairments; settlement gains or losses and mark-to-market adjustments associated with actuarial gains and losses on pension and other post-retirement benefit plans; environmental remediation costs, fines, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, joint ventures and equity investments; gains and losses on facility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the performance period; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results.

MARINE PLYWOOD Hammerhead™ panels are three times lighter than marine plywood MOISTURE ABSORPTION % weight change due to water absorption for selected composites and marine plywood 10000 60000 110000 160000 210000 260000 310000 360000 0.5 0.75 1 1.25 1.5 F le x u ra l R ig id it y - lb / in 2 Panel Thickness - in Hammerhead™ 5.3lb/in^3 Core Density Hammerhead™ 8.4lb/in^3 Core Density Plywood — Hammerhead™ 5.3 lb/ft3 Core Density — Hammerhead™ 8.4 lb/ft3 Core Density — Marine Plywood 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 0 10 20 30 40 50 60 70 80 90 100 % W e ig h t C h a n g e Immersion Time - Days .50" Hammerhead™ .75" Hammerhead™ 1" Hammerhead™ 1.50" Hammerhead™ .50" marine plywood .75" marine plywood 1" marine plywood Fl ex ur al R ig id ity - lb -in 2 INSTALLATION INSTRUCTIONS CUTTING & DRILLING Recommended blade: Industrial fine cut-off saw blade, 10" x 80 teeth 38° ATB grind with 5/8" bore, PTFE coating Recommended router bits: 3/8" diameter, 4 flute TiAlN (titanium aluminum nitride) coated carbide bit FORMING Apply localized 400˚F heat at a length proportional to the panel thickness (see equation below) and bend to shape.

The percent of change in tensile strength, elongation, modulus, and tear strength after heat aging is nominal.

We believe diversity of ideas and backgrounds gives us the creativity to be successful in a rapidly changing world. Some examples are: • Earnings or estimates or other financial information before public release • Significant changes in levels of operations • Discussions about major transactions including acquisitions, joint ventures or dispositions • Information about our financial condition, prospects or plans, marketing and sales programs, and R&D information • Changes in senior management that have not yet been publicly announced • Awards or cancellations of major contracts with customers or suppliers • Pending products or new products, services or processes • The existence of and developments relating to significant regulatory proceedings, government investigations and litigation involving the Company TABLE OF CONTENTS INTRODUCTION OUR CODE OF CONDUCT RESPECT FOR ALL HONESTY AT WORK INTEGRITY IN OUR BUSINESS CORPORATE SOCIAL RESPONSIBILITY RESOURCES CODE OF CONDUCT | 18 Political Contributions / Activities and Charitable Contributions Avient encourages you to stay informed about important issues, to vote and to be involved in the political process.

Are revision changes kept for the life of the active material?

Once a thermoset material is cured with heat it forms a permanent shape that cannot be reheated and reformed. 1http://www.coleparmer.com/Chemical-Resistance Chemical Resistance PERFORMANCE COMPARISON Exposure to chemicals can cause changes in weight, volume and pliability that degrade TPEs and LSR to the point of failure.

Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. validitystatement1: Validity of this certificate is based on the successful completion of the periodic surveillance audits of the management system defined by the above scope and is contingent upon prompt,written notification to ABS Quality Evaluations, Inc. of significant changes to the management system or components thereof. copyright: Copyright 2011-2019 ABS Quality Evaluations, Inc.

Slide 7 - Summary of Special Items Recast for DSS Divestiture Reflects special items from continuing operations which include charges related to specific strategic initiatives or financial restructuring such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting from personnel reduction programs, plant realignment costs, executive separation agreements; asset impairments; mark-to-market adjustments associated with actuarial gains and losses on pension and other post-retirement benefit plans; environmental remediation costs, fines, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, joint ventures and equity investments; gains and losses on facility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the performance period; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results.

Calculate using Let Down Percentage: Cost/lb of Concentrate x (Let Down Percentage/100) = Coloring Cost Calculate using Let Down Ratio: Cost/lb of Concentrate – Cost/lb of Resin Let Down Ratio +1 = Coloring Cost TWO WAYS TO CALCULATE COLORING COSTS OMNICOLOR™ TROUBLESHOOTING TWO WAYS TO CALCULATE COLORING COSTS SYMPTOM CAUSE REMEDY Color Variation Shot-to-Shot Poor Omnicolor preblending Pigment has insufficient thermal stability More thorough blending Ensure correct machine temperature control Screw Slip Premature melting of Omnicolor Excessive addition rate Reduce heat in feed zone Check addition rate and reduce if necessary Overall Good Distributive Mixing With Streaks or Dots of Another Color Poor pigment dispersion in concentrate Return concentrate for replacement Black Streaks or Splotches Degraded polymer in barrel Clean screw and barrel Poor Distributive Mixing (Streaking) Insufficient plastification See processing instructions Loss of Color Pigment has insufficient thermal stability Change to more heat stable colorant Ensure correct machine temperature control OMNICOLOR™ PROCESSING TEMPERATURES RECOMMENDED MAXIMUM PROCESSING TEMPERATURES FOR OMNICOLOR IN SELECTED POLYMERS IN °C UK COLOR NO.