From performance additives that focus on extending product life to special effect colorants that create stunning results, we have technologies that can help you address your challenges. DESIGN & PROCESSING Material flexibility and customization, extrusion and molding optimization techniques SOLUTION: Advanced polymer science, application development, technical service VISUAL AESTHETICS Custom colors, deep shades, special effects SOLUTION: Metallic colorants, granite & woodgrain effects DURABILITY Wind & impact resistance, chemical resistance, weatherability SOLUTION: Scratch & mar resistant or IR/UV resistant additives, dimensional stabilizers TECHNOLOGY DESCRIPTION TYPICAL APPLICATIONS Antimicrobial Additives Antimicrobial technology to limit microbe growth— reduces bacterial, mold and fungal growth on surface and through thickness, protecting finished part • Potable water equipment • Roofs & eaves • Decking, fencing & railings • High-touch surfaces • Bath surrounds, liners & inserts Scratch & Mar Resistance Additives For applications requiring resistance to daily surface abrasion, and management of surface energy • Exterior fencing, decking, railings & shutters • Outdoor furniture • Playground equipment Flame Retardant Additives Reduces spread of fire and heat release by creating a char to limit oxygen at the flame source • Wire & cable • Telecommunications • Decking, fencing & railings • Conduit • Exterior siding & cladding • Housings UV and Light Blocking Additives UV stabilizers help mitigate the harmful effects of UV radiation while light blocking additives protect products sensitive to light • Exterior siding & cladding • Trim & moldings • Roofing, shingles, tiles • Outdoor furniture • Fencing, decking, railings & shutters Anti-static and Conductive Additives Controls build-up of static charges to create static-dissipated parts while reducing related dust accumulation • Electrical connectors • Conduit or tubing • Junction boxes • Flooring • 5G enabling Chemical Foaming Agents Reduces weight and density without compromising mechanical properties • Exterior siding & cladding • Modular panels • Decking, fencing & railings Optimization Additives Cycle-time reducers that help optimize production while allowing improved dimensional stability and energy efficiency, among other processing benefits • Used in extrusion and injection molding processes to improve thermal conductivity, and lower processing temperatures and energy consumption Laser Marking Supports design and production flexibility and offers a new level of control in marking polymers with speed and clarity • Wire & cable • Outdoor furniture • Equipment & housings • Pipes & fittings Anti-counterfeiting Additives Customizable in-plastic authentication technologies that enable positive identification versus counterfeit products • Wire & cable jacketing • Pipes & fittings • Telecommunications • Potable water equipment Wood Plastic Composite (WPC) Capstock Technology Pair with traditional WPC materials as a substrate for a durable outer layer • Exterior siding & cladding • Outdoor furniture • Fencing, decking & railings Sustainable Colorants & Additives Color concentrates and additives carefully chosen to meet industry requirements and legislation, and designed to lower environmental impact while improving sustainability • Green building roofing • OSHA compliance • Sheet & profile extrusions • LEED building & material credits FX Special Effects Colorants Granite, marbling, woodgrain and other distinctive colorant technologies to provide special surface effects • Decorative molding • Chair or hand rails • Wallcovering • Blinds & shutters • Any surface or part demanding a distinctive look Pool Colorants Durable, long-lasting pigment formulations for finishes that hold up to pool water chemistries • Pool decks • Coping • In-ground swimming pools Metallic Flooring & Stain Colorants Colorants designed to give concrete floors and surfaces a distinctive appearance • Concrete flooring • Countertops • Decorative concrete • Walls While this listing represents many Avient solutions and addresses common applications, we can tackle many other building & construction needs.

TEL:+31(0)102922689. www.dnvgl.com/assurance Page 2 of 2 Appendix to Certificate PolyOne-Shanghai, China Locations included in the certification are as follows: Site Name Site Address Site Scope PolyOne Polymer (Tianjin) Company Limited No.28#C, Jin Bin Hi-Tech Industrial Park, 156 Nan Hai Road, Tianjin Economic-Technological, Tianjin, China, 300457 Manufacture of Masterbatch PolyOne-Shanghai, China No. 88, Guo Shou Jing Road, Z.

Zwolseweg 1, 2994 LB, Barendrecht, Netherlands - TEL: +31(0)102922689. www.dnv.com/assurance Page 2 of 2 Appendix to Certificate Polyone - Suzhou, China Locations included in the certification are as follows: Site Name Site Address Site Scope PolyOne Management (Shanghai) Co., Ltd.

In particular, innovative solutions are needed to address weathering issues.

PROFILE/SHEET EXTRUDER R A I L S A N D K I C K P L A T E S • Convert existing PVC profile and sheet rails and kick plates to polyolefin resin to meet Class A fire safety (ASTM E84) • Provide a system that meets healthy building certifications and approvals • Utilize a more sustainable flame retardant technology, removing brominated or halogenated flame retardants from the environment • Achieve non-compromising performance in aesthetics, impact, dimensional stability, CLTE, and E84 testing • Provided broad flame retardant platform, backed by extensive application and industry expertise, to meet global flammability standards • Has largest UL94 recognized Prospector membership with HB, V-0, V-1, V-2 and 5VA/5VB ratings, and broad glow wire performance products • Included in-house UL certified labs and manufacturing locations to perform UL94 material sampling and testing • Supported application development to meet fire safety standards, address current or emerging healthy building codes, smart home requirements, and LEED credits • Offered custom formulations in small lot quantities Cesa™ Flam Non-Halogen Flame Retardants KEY REQUIREMENTS WHY AVIENT?

Any translations of this document shall be used for reference only.) 2/2 Appendix to the Certificate of Approval AWARDED TO PolyOne France Tossiat Route de la vavrette, 01250, Tossiat - France IATF USI: LWZS4P REMOTE SUPPORT FUNCTION(S) NAME ADDRESS SCOPE AVIENT LUXEMBOURG 19, Route de bastogne, 9638, Pommerloch - Luxembourg IATF USI: GAZS9A Purchasing, Logistics, Supplier Management PolyOne Europe Logistics 7 Rue bleriot, 4460, Grace-Hollogne - Belgium IATF USI: P4WA4Y Warehousing Polyone Poland Ul. wschdnia 6, 99-300, Kutno - Poland IATF USI: C4W5ZL Logistics https://e-cer.bureauveritas.com/68LJQE0ZV0CO6I7YW0YSXOUMV9WWROQPHPI2AOHRRLFFVRAVTFVZGXKWIE3TOWLTTKEWCPQB9UNAPXHH6T0HXOMUEDVYPRPJLEXBBTKQYPBRICYOKY143TECQ5UMHGA3JX 2024-12-13T10:07:11+0100 Authenticity and Integrity

Ltd Business Registration Number: 91320505799067336K Registered I Operation Address: 13 Plant, No.855, Zhujiang Road, Suzhou New District, Jiangsu Province, China by reason of its Quality Management System has been awarded this certificate for compliance with the standard ISO 9001:2015 The Quality Management System Applies in the following area: Production Activities of Plastic Colorant & Additive (UV Blockers, Anti-Oxidation, Anti-Aging) Certified since: January 8, 2009 Valid from: January 16, 2024 Valid until: January 4, 2027 the expiry date of last certification cycle: January 4, 2024 the date of recertification audit: December 21, 2023 to December 22, 2023 After a surveillance cycle, the certificate is valid only when used together with an Acceptance Notice of Surveillance Audit issued by CQC.

Ltd Business Registration Number: 91320505799067336K Registered/ Operation Address: 13 Plant, No.855, Zhujiang Road, Suzhou New District, Jiangsu Province, China by reason of its Environmental Management System has been awarded this certificate for compliance with the standard ISO 14001:2015 The Environmental Management System Applies in the following area: Production and Related Management Activities of Plastic Colorant & Additive (UV Blockers, Anti-Aging,Anti-Oxidation) Certified since: June 6, 2012 Valid from: January 17, 2024 Valid until: January 7, 2027 the expiry date of last certification cycle: January 7, 2024 the date ofrecertification audit: December 21, 2023 to December 22, 2023 After a surveillance cycle, the certificate is valid only when used together with an Acceptance Notice of Surveillance Audit issued by CQC.

Zwolseweg 1, 2994 LB, Barendrecht, Netherlands - TEL: +31(0)102922689. www.dnv.com/assurance Page 2 of 2 Appendix to Certificate PolyOne-Shanghai, China Locations included in the certification are as follows: Site Name Site Address Site Scope PolyOne Polymer (Tianjin) Company Limited No. 28#C, Jin Bin Hi-Tech Industrial Park, No. 156, Nan Hai Road, Tianjin Economic- Technological Development Area, Tianjin, China 300457 Manufacture of Colour and Additive Concentrates PolyOne-Shanghai, China No. 88, Guo Shou Jing Road, Z.

Schuering Page 77 Appliance 5% Building & Construction 3% Wire & Cable 3% Electrical & Electronics 3% Consumer 21% Industrial 24% HealthCare 21% Transportation 17% 2011 Revenue: $1.0 Billion2011 Revenue: $1.0 Billion Key SuppliersKey Suppliers At a Glance Distribution Packaging 3% 2.6% 3.0% 3.5% 4.0% 4.6% 5.6% 2006 2007 2008 2009 2010 2011 2015 Operating Income % of Sales ROICROIC Expanding ProfitsExpanding Profits 15.3% 18.4% 22.4% 30.0% 39.2% 48.6% 2006 2007 2008 2009 2010 2011 Target 6 – 7.5% Page 78 Value Proposition and Transformation Highlights Distribution Value Proposition • North America-based distributor with expanding global reach providing key plastic processors and market segments with best-in-class suppliers products, service and delivery with a commitment to develop value-added solutions to enhance customer profitability Transformation Highlights • Significant market share gains with key suppliers , > $5B Addressable Market • Significant market share gains with key suppliers � Proprietary PolyOne technology � Dow Corning • Improved sales mix and profitability by shifting to non-cyclical businesses like healthcare • Established presence in Brazil and Asia in 2011 Page 79 Key Differentiators Distribution • Product offering � Breadth and depth; industry leading suppliers • Sales and marketing capability • Customer service / logistics operations � Customer survey results – consistent best-in-class performance � Leading on-time delivery • Management team experience and stability • Lean Six Sigma � Solving our customers’ unmet needs Page 80 $102.8 $207.2 2006 2011 Healthcare Revenue • Strong market segmentation provides focused resourcing to accelerate growth • Expanding global reach meets Areas of Focus Distribution 2006 2011 $66.0 $182.4 2006 2011 National Accounts Revenue • Expanding global reach meets customers’ needs and creates competitive differentiation • Selling skills & product application knowledge to target executives & engineers ($ millions) Page 81 Critical Imperatives • Invest in commercial resources to accelerate growth • Expand healthcare and key account revenues • Broaden geographic reach and develop new markets and channel partnerships Critical Imperatives and 2015 Goal Distribution channel partnerships • Continue to improve working capital efficiency and superior cash flow generation 2015 Goal • 6 - 7.5% return on sales Page 82 Page 83