Certificate of Registration 9001:2015 MSP 9001:2015–MSP-ANAB-US (2.0) Page 1 of 2 Certificate of Registration of Quality Management System to ISO 9001:2015 The National Standards Authority of Ireland certifies that: Colorant Chromatics Ab Kroklundsvagen 346 AX-22 320 Odkarby Aland Finland has been assessed and deemed to comply with the requirements of the above standard in respect of the scope of operations given below: The Design, Manufacture and Sales of Fluoropolymer Color Concentrates and Compounds Additional sites covered under this multi-site certification are listed on the Annex (File No. 19.2540/C) Approved by: Geraldine LarkinChief Executive Officer Approved by: Lisa Greenleaf Operations Manager Registration Number: 19.2540/C Certification Granted: May 15, 1997 Effective Date: Oct 20, 2018 Expiry Date: Oct 19, 2021 National Standards Authority of Ireland, 20 Trafalgar Square, Nashua, New Hampshire, NH 03063, USA T +1 603 882 4412 9001:2015–MSP-ANAB-US (2.0) Page 2 of 2 Annex to Certificate Number: 19.2540/C Scope of Registration: The Design, Manufacture and Sales of Fluoropolymer Color Concentrates and Compounds Activity Location Central Management Group, Design, Manufacture Colorant Chromatics Kroklundsvagen 346 AX-22 320 Odkarby Aland Finland File No.: 19.2540/C Headquarters, Sales, Distribution Colorant Chromatics Europe B.V.

TECHNICAL PROPERTIES(1) TEST METHOD Edgetek™ ET8900-0011 HI UV NAT Edgetek™ ET8900-0012 HI UV White Edgetek™ ET8900-0013 HI UV Black Physical Density/Specific Gravity ASTM D792 1.13 g/cm3 1.15 g/cm3 1.13 g/cm3 Molding Shrinkage - Flow ASTM D955 1.4–2% 1.4–2% 1.4–2% Mechanical Tensile Strength (Yield) ASTM D638 5,900 psi 5,800 psi 5,800 psi Tensile Modulus(2) ASTM D638 169,000 psi 161,087 psi 176,000 psi Flexural Modulus(3) ASTM D790 187,000 psi 190,985 psi 188,000 psi Impact Notched Izod Impact 73°F (23°C), 0.125 in ASTM D256A 17.3 ft-lb/in 16.5 ft-lb/in 16.5 ft-lb/in Notched Izod Impact -22°F (-30°C), 0.125 in ASTM D256A 3.2 ft-lb/in 3.0 ft-lb/in 3.3 ft-lb/in Thermal (HDT) 66 psi (0.45 MPa), 0.125 in ASTM D648 121°C 135°C 129°C NORTH AMERICA GRADES (1) Data based on single lot of lab generated samples.

TECHNICAL BULLETIN 1.844.4AVIENT www.avient.com PROPERTY TEST METHOD UNITS VERSAFLEX ™ CE 3130-80N VERSAFLEX™ CE 3130-70N Shore Hardness ASTM D2240 Shore A 79 69 Specific Gravity ASTM D792 g/cm3 1.08 1.04 Tensile Strength ASTM D412 psi 2,484 2,222 Melting Flow Index (190°C, 21.6kg) ASTM D1238 g/10min 5.2 4.4 Elongation ASTM D412 % 864 667 Flexural Modulus @ 300% ASTM D790 psi 975 855 Viscosity @ 11,170 sec, 200°C ASTM D3835 Pa.s 30.6 22.2 Abrasion (Mass Lost) ASTM D3389 mg 1.1 2.6 UV Resistance 0.68W/m 2 45°C 168hours — Good Good Stain Resistance *Condition 1*Condition 2 — Excellent Excellent Blooming 85% RH30°C,168 hours — Non Non Processing (Demold) — — Excellent Good Cycle Time — — Short Middle Overmold Substrate — — PC/ABS PC/ABS KEY PROPERTIES AND OVERMOLD PERFORMANCE Copyright © 2021, Avient Corporation. Condition 2: Sunblock and hand cream stand on the surface for 24 hours at 50°C, then removed to observe the surface performance. UV Resistance Test - 0.68W/m2 @ 45°C expose 168 hours Anti-abrasion Test - H18 wheel load 1kg @ 500 cycles Surface/Non-blooming - Visual observation Touch Feel - Hand touch Mechanical Properties - Refer to hardness, gravity, tensile strength, elongation, MFI, and flexural modulus, which are tested using ASTM methods Processing - Demold speed & cycle time TEST RESULTS Comprehensively, the Versaflex CE 3130 non-blooming series performed better than competitive materials in balancing functional properties and processing.

GUIDANCE ( T O TA L C O M PA N Y ) 11 $845 $824 Guidance Actual $130 $131 Guidance Actual Sales Adjusted EBITDA (in millions) $0.60 $0.63 Guidance Actual Adjusted EPS (in millions) Q2 2023 PERFORMANCE VS. GUIDANCE ( T O TA L C O M PA N Y ) 12 15.4% 15.9% Guidance Actual Adjusted EBITDA Margin % Better-than-expected margins driven by: • Favorable mix - strong demand for composite applications • Raw material deflation Q2 EBITDA BRIDGE ( T O TA L C O M PA N Y ) 13 ($ millions) CAI: Price / Mix 7) Deflation 11) SEM: Price / Mix 2) Deflation 6) Net Price Benefit 26) Wage and Energy Inflation (10) Cost Reductions 13) FX (2) Q2 2023 Actual $131) Adjusted EBITDA Q2 2022 Pro Forma $ 172) Demand (68) • Demand conditions vs. Avient reflects 2023 adjusted EBITDA guidance of $525M and estimated run-rate CAPEX of $110M. 2023E (%) 27 79 89 83 83 78 75 90 81 76 72 68 63 53 11 A vi e n t K W R F U L P P G A V Y R P M F M C C E E C L A S H H X L H U N E M N S C L Avient Specialty Formulators Other Specialty / Chemical Companies MULTI PL E EX PANSION Source: Peer data per Bloomberg as of August 17, 2023 Note: Avient reflects 2023 adjusted EBITDA guidance of $525M and closing share price of $37.07.

E L E C T R I C H A I R C L I P P E R S H A I R S T Y L I N G A P P L I A N C E M A N U FAC T U R E R • Regulatory – UL rated flame retardancy • High stiffness and impact resistance • Excellent surface appearance • Colorability/color matching – specific black color • Provided color matching expertise to match glass fiber reinforced formulation to specific customer requirement • Enabled customer to diversify into a new market with a new design of hair clipper for consumers • Developed material quickly - three months from brief to production Bergamid™ A700 glass reinforced flame retardant formulation KEY REQUIREMENTS WHY AVIENT?

WO O D P L A S T I C C O M P O S I T E ( W P C ) M F G S H E E T A N D D E C K I N G • Lightweighting solution offering energy savings and manufacturing efficiencies • Reduced downtime associated with poor quality rejections • Consistent and uniform cell structure in decking material • Compatibility with mono-core extrusion formula (rice hull bio-filler and virgin PVC) when used with a chemical foaming additive • Density control of 0.60-0.65 g/cc in production • Provided a CFA solution that offered energy savings, process optimization, and extended manufacturing run times • Enabled improved performance results and enhanced process control • Allowed tighter tolerance control with uniform cell structure, eliminating voids and surpassing density target ($100K savings) • Increased productivity and aesthetic finish with secondary operations (sanding) KEY REQUIREMENTS Excelite™ Chemical Foaming Additives (CFA) WHY AVIENT?

C A R C O M P O N E N T M A N U FAC T U R E R A C O U S T I C A N D T H E R M A L M A N A G E M E N T S Y S T E M S • High rPET content without loss of tenacity • High volume production • Color options • Offered a chain extender that supports stable spinning and maintains fiber tenacity to help achieve targeted rPET content • Provided technical support for production scale-up • Proposed different color concentrates suitable for application and polymer grade Cesa™ Fiber Additives – chain extenders for recycled polyester (rPET) KEY REQUIREMENTS WHY AVIENT?

PTFE Wire insulation C O N S U M E R & A E R O S PA C E M O L D E R S M E T A L L I C - E F F E C T S U L F O N E S O L U T I O N • Metallic appearance • FDA-food contact compliance* • Resistant to repeated washing, steam sterilization, and chemical disinfection cycles • Easy processing to meet flexible design requests • Lightweight to support a reduction in carbon emissions • Created a variety of food contact-approved, brilliant metallic effect colors such as gold, silver, and bronze for optimal aesthetics • Ensured excellent mechanical performance after repeated steam sterilization and harsh chemical cleaning​ cycles • Offered low MOQ with flexible supply options Colorant Chromatics and BASF Ultrason® high-performance polymers in metallic colors KEY REQUIREMENTS WHY AVIENT?

DIAGNOSTICS MANUFACTURER C O V I D - 1 9 C O N T A I N M E N T T U B E S C R E W C A P S • Wide range of durometers with consistent raw materials • Processing consistencies across the durometer ranges for an easy transition between materials • Materials formulated without animal derivatives at a competitive cost • Offered a comprehensive range of solutions to accommodate specific application demands such as barrier, flexibility, and sealing performance • Provided materials manufactured in an ISO 13485 certified facility • Delivered a series of medical-grade TPEs that could be extruded and injection molded Versaflex™ HC 3810 Thermoplastic Elastomers KEY REQUIREMENTS WHY AVIENT?

OnFlex LO - HVAC Flap - Spanish PROVEEDOR TIER 2 R E J I L L A P A R A S I S T E M A S D E V E N T I L A C I Ó N Y C A L E F A C C I Ó N • Eliminar el post-calentamiento de las piezas a fin de lograr el nivel de olor necesario (≤3.0 VDA 270) • Tener la menor emisión de compuestos orgánicos volátiles (VOC/FOG) (VDA 278), con el mismo compresión set del material anterior • Menos pasos de procesamiento y menores costos de energía para el moldeador • Se lograron los niveles VOC/FOG requeridos y se cumplió el desempeño con el estándar de compresión set OnFlex™ LO REQUERIMIENTOS CLAVE ¿POR QUÉ AVIENT?