No. 0562.01) 11/30/2023 Page 1 of 1 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 AVIENT CORPORATION 733 East Water Street North Baltimore, OH 45872 Claire Holman Phone: (419) 257-1327 MECHANICAL Valid To: October 31, 2025 Certificate Number: 0562.01 In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to this laboratory to perform the following automotive plastics tests: Test Method: Test Name: ASTM D412 Tensile ASTM D523 Specular Gloss ASTM D618 (A) Conditioning of Plastics ASTM D624 (Die C) Tear Strength ASTM D638 Tensile Properties ASTM D792 (A) Density and Specific Gravity by Displacement ASTM D1004 Initial Tear Resistance ASTM D1203 (A) Volatile Loss ASTM D1895 (A) Apparent Density, Bulk Factor, Pourability ASTM D1921 Particle Size (Sieve Analysis) ASTM D2240 Durometer Hardness (Shore A and D) ASTM E1331 Color by Spectrophotometry Using Hemispherical Geometry FMVSS 571.302 Flammability FORD BN-102-01 (A) Low Temperature Flexibility FORD BO-131-03 Interior Odor ISO 3795 Determination of Burning Behavior of Interior Materials SAE J323 (A) Cold Cracking (Mandrel Bend) SAE J1351 Hot Odor for Insulation Materials SAE J1545 Instrumental Color Difference Measurement DOC-058151 Angle of Repose 1 Laboratory Developed Method For the tests to which this accreditation applies, please refer to the laboratory’s Mechanical Scope of Accreditation. Accredited Laboratory A2LA has accredited AVIENT CORPORATION North Baltimore, OH for technical competence in the field of Mechanical Testing This laboratory is accredited in accordance with the recognized International Standard ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories. Trace McInturff, Vice President, Accreditation Services For the Accreditation Council Certificate Number 0562.01 Valid to October 31, 2025 0562-01 0562-01c

Avient in Europe, Middle East and Africa PolyOne S.à r.l., Avient Luxembourg S.à r.l., 19 Route de Bastogne Dyneema® Changes the Game of Fabric Engineering Yet Again with New Composite Technology...

Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation. Further, as a result of Avient's portfolio shift to a pure play specialty formulator, it has completed several acquisitions and divestitures which have resulted in a significant amount of intangible asset amortization.

PolyOne DB5548 Red NP (P542) Avient Product Code (Material or Material Number) may be found on any of the following: Product Quotation - labeled as "Avient Material" Invoice - under "Material Header"

Browse and download our literature to learn more about Avient solutions and services. Fiber-Line Engineered Fibers - Products & Applications Fiber-Line™ engineered fiber solutions are designed to meet the most specific and demanding requirements

Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. 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 en 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 MULTIPLE EXPANSION 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. Further, as a result of Avient's portfolio shift to a pure play specialty formulator, it has completed several acquisitions and divestitures which have resulted in a significant amount of intangible asset amortization.

OUTDOOR OEM C A B L E S L I D E • Reduce wear and improve performance to minimize noise and string fraying caused by highly repetitive use • Increase lubricity while maintaining balance of rigidity and impact strength • Perform in outdoor environments • Reduce total part price LubriOne™ Internally Lubricated Formulation KEY REQUIREMENTS WHY AVIENT? AVIENT SOLUTION OPTIMIZED COEFFICIENT OF FRICTION LEARN MORE Copyright © 2021, Avient Corporation. All Rights Reserved. • Utilized material expertise to present multiple customized options, allowing the customer to select a solution that best met both cost and performance requirements • Quickly turned around a specialty formulation that outperformed the incumbent and competitive materials being reviewed • Delivered solution that worked with existing tooling to minimize costs • Supported material transition with coefficient of friction testing and live technical service https://www.avient.com/products/engineered-polymer-formulations/general-engineered-formulations/lubrione-internally-lubricated-formulations

Fiber-Line™ Engineered Fiber Products Explore our broad engineered synthetic fiber product portfolio     Browse and download our literature to learn more about Avient solutions and services.

Carefully selected regulatory compliant raw materials and chemicals Fiber-Line™ Engineered Fiber Products Browse and download our literature to learn more about Avient solutions and services.

INDUSTRIAL SAFETY OEM B A T T E R Y P A C K H O U S I N G • Static dissipation with dependable performance to protect users from electrical shock • Chemical resistance to withstand industrial cleaning protocols • Colorable material to differentiate models • Achieve target shrink rates • Injection moldable for high-volume production • Provided a custom concentrate material for flexibility in tailoring static dissipation performance • Offered on-site technical support to ensure proper blending and consistent end-application performance • Secured a long-term consistency in specialty raw material supply Surround™ Long Stainless Steel Fiber Reinforced Polycarbonate KEY REQUIREMENTS WHY AVIENT? AVIENT SOLUTION INJECTION MOLDABLE + STATIC DISSIPATION LEARN MORE Copyright © 2023, Avient Corporation. All Rights Reserved https://www.avient.com/products/engineered-polymer-formulations/conductive-signal-radiation-shielding-formulations/surround