Tensile strength and elongation at yield retention between 75-125% 2. Figure 2. Public Health Reports 2007, 122 (2), 160–166. 3.

TAB TESTING OF VARIOUS INSTALLATION METHODS Hammerhead™ PETG Laminate Hammerhead™ PETG Laminate BOTTOM PANEL LEG LENGTH BREAK STRENGTH PETG Skins with Plywood Core 1 in/25 mm 1.5 in/38 mm 2 in/51 mm 2400 lbs/1089 kg 2820 lbs/1279 kg 2748 lbs/1246 kg Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density 2 in 51 mm 665 lbs 302 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density 2 in 51 mm 881 lbs 400 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density 2 in 51 mm 1084 lbs 492 kg Marine Plywood 2 in 51 mm 770 lbs 349 kg Glass/Epoxy with Plywood Core 2 in 51 mm 1055 lbs 479 kg Glass/Polyester with Balsa Core 2 in 51 mm 919 lbs 417 kg L-Bracket Installation Hammerhead™ PETG Laminate Hammerhead™ PETG Laminate BOTTOM PANEL LEG LENGTH BREAK STRENGTH PETG Skins with Plywood Core 2 in 51 mm 2375 lbs 1077 kg Marine Plywood 2 in 51 mm 770 lbs 349 kg Glass/Polyester with Balsa Core 2 in 51 mm 797 lbs 362 kg U-Channel Installation ITW Plexus MA420 adhesive was used in all tab testing installations except where noted. GL AS S/ EP OX Y TA B M AT ER IA L N O T AB BOTTOM PANEL LEG LENGTH BREAK STRENGTH Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density 2 in 51 mm 420 lbs 191 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density 2 in 51 mm 370 lbs 168 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density 2 in 51 mm 332 lbs 151 kg Marine Plywood 2 in 51 mm 984 lbs 446 kg Glass/Polyester with Balsa Core 2 in 51 mm 1298 lbs 589 kg Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 501 lbs 227 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 839 lbs 381 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 1156 lbs 524 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density - Crestomer 1152PA Adhesive NA 1530 lbs 694 kg Hammerhead with 8 lb/in3 (135 kg/m3) Core Density - Crestomer M1-30 Adhesive NA 1471 lbs 667 kg Mixed Conditions ADHESIVE DESCRIPTION ADHESIVE GRADE MANUFACTURER AVERAGE BOND STRENGTH STANDARD DEVIATION FAILURE MODE BEST ADHESION 2k Urethane 75421 LORD 2281 psi 15.73 MPa 184 psi 1.27 MPa Substrate Cohesive 2k Acrylic SA1-705 GRY1 ACRALOCK 2211 psi 15.24 MPa 78 psi 0.54 MPa Substrate 2k Acrylic Plexus MA420 ITW 2171 psi 14.97 MPa 262 psi 1.81 MPa Substrate 2k Acrylic SA10-05 Blk1 ACRALOCK 2102 psi 14.49 MPa 138 psi 0.95 MPa Substrate 2k Urethane 75451 LORD 2047 psi 14.11 MPa 68 psi 0.47 MPa Cohesive 2k Acrylic SA1-705 GRY 1:1 ACRALOCK 1966 psi 13.56 MPa 68 psi 0.47 MPa Substrate 2k Acrylic Scotch-Weld 8010 3M 1907 psi 13.15 MPa 61 psi 0.42 MPa Adhesive Cyanoacrylate Gorilla Glue Gorilla Glue 1885 psi 13.00 MPa 432 psi 2.98 MPa Cohesive 2k Acrylic Crestabond PP-04 Scott Bader 1873 psi 12.91 MPa 281 psi 1.94 MPa Substrate 2k Acrylic SA10-05 Blk 10:1 ACRALOCK 1779 psi 12.27 MPa 127 psi 0.88 MPa Cohesive 2k Urethane 75422 LORD 1716 psi 11.83 MPa 190 psi 1.31 MPa Cohesive Adhesive 2k Urethane 75452 LORD 1535 psi 10.58 MPa 98 psi 0.68 MPa Adhesive 2k Methacrylate PolyFuse Icon Containment 1610 psi 11.10 MPa 98 psi 0.68 MPa Adhesive INTERMEDIATE ADHESION 2k Acrylic FA10-05 Blk C010817 ACRALOCK 724 psi 4.99 MPa 58 psi 0.40 MPa Cohesive 2k Acrylic FA10-05 Blk1 ACRALOCK 722 psi 4.98 MPa 44 psi 0.30 MPa Cohesive 2k Epoxy Loctite Epoxy Instant Mix Loctite 508 psi 3.50 MPa 81 psi 0.56 MPa Adhesive 2k Epoxy Gorilla Epoxy Gorilla Glue 341 psi 2.35 MPa 198 psi 1.37 MPa Adhesive NOT RECOMMENDED 2k Epoxy Loctite Epoxy Marine Loctite 0 0 No bond ADHESIVE SELECTION Brand names of the adhesives are owned by the respective manufacturers. Reference to them does not indicate any affiliation with or endorsement by them. 1 surface sanded with 220 grit scuff prep 2 surface primed with 459T For more information on installation, adhesives, and fasteners for specific applications, please contact Avient.

The wet out characteristic is determined by the rheology of the TPEs as shown in Figure 2. The data is reported as average force over 2 inch (5.08mm) of pulling at speed of 2"/min (5.08mm/min). As seen in Table 2, chemistry, types and aging have no effect on bonding strength.

AVIENT CORPORATION S E C O N D Q U A R T E R 2 0 2 3 R E S U L T S (NYSE: AVNT) J U LY 2 7 , 2 0 2 3 DISCLAIMER Forward-Looking Statements Certain statements contained in or incorporated by reference into this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Additionally, Adjusted EPS excludes the impact of special items and amortization expense associated with intangible assets. 2 COMPOSITES PORTFOLIO D Y N E E M A ® E X P A N D S O U R E N G I N E E R E D F I B E R S A N D P A N E L S T E C H N O L O G Y LFT Tapes Laminates/Panels Shapes Pultrusion Engineered Fibers 4 DEFENSE TELECOMMUNICATIONS ENERGY TRANSPORTATION Military • Law Enforcement First Responders Body Armor • Helmets Vehicle Protection Sustainable Infrastructure Offshore Wind Electrical Grid Protection EV Battery Components Commercial Laminates Body & Trim • Air Cargo and Railroad Car Panels 5G Applications Fiber Optic Cables Satellite Communications Connectors and Components 5 COMPOSITES SERVE DIVERSIFIED END MARKETS INDUSTRIAL Lifting Slings • Aquaculture High Pressure Pipe Conveyer Springs Q 2 P ER FO RM A N CE Q2 2023 PERFORMANCE VS. GUIDANCE (TOTAL COMPANY) 8 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 (TOTAL COMPANY) 9 ($ 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. expectations: US & Canada LATAM EMEA Asia • Net price benefit remains greater than wage and energy inflation • Clariant synergies and reduced administrative costs Q2 2023 SEQUENTIAL SALES BY REGION Q 2 2 0 2 3 v s .

TECHNICAL BULLETIN 1 How to keep a sustainable PET recycling industry in Europe - EPBP - European PET Bottle Platform 2 How circular is PET? Picture of plaques originally made from preforms containing Fortis Amber-1 and Amosorb Solo2-2. Bottle A is the original bottle with 100% virgin material and a combination of Amosorb SolO2-2 at 4% with Fortis Amber-1 at 0.09% LDR.

Kateřiny Hájkové, LL.M., datum narození 03.06.1982, adresa místa pobytu Křižíkova 220/91, Karlín, 186 00 Praha 8, advokáta, evidenční číslo ČAK 13682, spolupracujícího s PRK Partners s.r.o., advokátní kancelář, IČO 266 92 392, se sídlem Jáchymova 26/2, Staré Město, 110 00 Praha 1, dle kterého výpis z obchodního rejstříku obsahuje stav aktuální ke dni konání valné hromady dne 21.10.2021. ----------------------------------- 2. Kateřina Hájková, LL.M., datum narození 03.06.1982, adresa místa pobytu Křižíkova 220/91, Karlín, 186 00 Praha 8, advokáta, evidenční číslo ČAK 13682, spolupracujícího s PRK Partners s.r.o., advokátní kancelář, IČO 266 92 392, se sídlem Jáchymova 26/2, Staré Město, 110 00 Praha 1 (dále též „Předsedající“). Obchodní firma: Avient Material Solutions ČR s.r.o.---------------------------------------------- 2.

B H D . 2 11 23 12 10 10 1 2 11 22 1 3 10 10 1 SOH SOCK LAN S1189628F 603-62583692 PENGARAH 2 1 09-Jun-2021 440790-X WP KUALA LUMPUR KUALA LUMPUR 5 2 1 0 0 9-3A-1, JLN METRO PERDANA BARAT 1, TMN USAHAWAN KEPONG UTARA,

Example: Deflection for 24 inch panel = Chart value *[12 / 24] Performance Comparison Hammerhead Panels and Marine Plywood TAB TESTING OF VARIOUS INSTALLATION METHODS Hammerhead™ PETG Laminate Hammerhead™ PETG Laminate BOTTOM PANEL LEG LENGTH BREAK STRENGTH PETG Skins with Plywood Core 1 in/25 mm 1.5 in/38 mm 2 in/51 mm 2400 lbs/1089 kg 2820 lbs/1279 kg 2748 lbs/1246 kg Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density 2 in 51 mm 665 lbs 302 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density 2 in 51 mm 881 lbs 400 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density 2 in 51 mm 1084 lbs 492 kg Marine Plywood 2 in 51 mm 770 lbs 349 kg Glass/Epoxy with Plywood Core 2 in 51 mm 1055 lbs 479 kg Glass/Polyester with Balsa Core 2 in 51 mm 919 lbs 417 kg L-Bracket Installation Hammerhead™ PETG Laminate Hammerhead™ PETG Laminate BOTTOM PANEL LEG LENGTH BREAK STRENGTH PETG Skins with Plywood Core 2 in 51 mm 2375 lbs 1077 kg Marine Plywood 2 in 51 mm 770 lbs 349 kg Glass/Polyester with Balsa Core 2 in 51 mm 797 lbs 362 kg U-Channel Installation ITW Plexus MA420 adhesive was used in all tab testing installations except where noted. GL AS S/ EP OX Y TA B M AT ER IA L N O T AB BOTTOM PANEL LEG LENGTH BREAK STRENGTH Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density 2 in 51 mm 420 lbs 191 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density 2 in 51 mm 370 lbs 168 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density 2 in 51 mm 332 lbs 151 kg Marine Plywood 2 in 51 mm 984 lbs 446 kg Glass/Polyester with Balsa Core 2 in 51 mm 1298 lbs 589 kg Hammerhead with 5 lb/ft3 (80 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 501 lbs 227 kg Hammerhead with 7 lb/ft3 (115 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 839 lbs 381 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density - ITW Plexus MA420 Adhesive NA 1156 lbs 524 kg Hammerhead with 8 lb/ft3 (135 kg/m3) Core Density - Crestomer 1152PA Adhesive NA 1530 lbs 694 kg Hammerhead with 8 lb/in3 (135 kg/m3) Core Density - Crestomer M1-30 Adhesive NA 1471 lbs 667 kg Mixed Conditions ADHESIVE DESCRIPTION ADHESIVE GRADE MANUFACTURER AVERAGE BOND STRENGTH STANDARD DEVIATION FAILURE MODE BEST ADHESION 2k Urethane 75421 Lord 2281 psi 15.73 MPa 184 psi 1.27 MPa Substrate Cohesive 2k Acrylic SA1-705 GRY1 AccraLock 2211 psi 15.24 MPa 78 psi 0.54 MPa Substrate 2k Acrylic Plexus MA420 ITW 2171 psi 14.97 MPa 262 psi 1.81 MPa Substrate 2k Acrylic SA10-05 Blk1 AccraLock 2102 psi 14.49 MPa 138 psi 0.95 MPa Substrate 2k Urethane 75451 Lord 2047 psi 14.11 MPa 68 psi 0.47 MPa Cohesive 2k Acrylic SA1-705 GRY 1:2 AccraLock 1966 psi 13.56 MPa 68 psi 0.47 MPa Substrate 2k Acrylic Scotchweld 8010 3M 1907 psi 13.15 MPa 61 psi 0.42 MPa Adhesive Cyanoacrylate Gorilla Glue Gorilla Glue 1885 psi 13.00 MPa 432 psi 2.98 MPa Cohesive 2k Acrylic Crestabond PP-04 Scott Bader 1873 psi 12.91 MPa 281 psi 1.94 MPa Substrate 2k Acrylic SA10-05 Blk 10:2 AccraLock 1779 psi 12.27 MPa 127 psi 0.88 MPa Cohesive 2k Urethane 75422 Lord 1716 psi 11.83 MPa 190 psi 1.31 MPa Cohesive Adhesive 2k Urethane 75452 Lord 1535 psi 10.58 MPa 98 psi 0.68 MPa Adhesive 2k Methacrylate Polyfuse Icon Containment 1610 psi 11.10 MPa 98 psi 0.68 MPa Adhesive INTERMEDIATE ADHESION 2k Acrylic FA10-05 Blk C010817 AccraLock 724 psi 4.99 MPa 58 psi 0.40 MPa Cohesive 2k Acrylic FA10-05 Blk1 AccraLock 722 psi 4.98 MPa 44 psi 0.30 MPa Cohesive 2k Epoxy Loctite Epoxy Instant Mix Loctite 508 psi 3.50 MPa 81 psi 0.56 MPa Adhesive 2k Epoxy Gorilla Glue Epoxy Gorilla Glue 341 psi 2.35 MPa 198 psi 1.37 MPa Adhesive NOT RECOMMENDED 2k Epoxy Loctite Epoxy Marine Loctite 0 0 No bond ADHESIVE SELECTION Brands identified are owned by the manufacturers of the adhesive products. 1 surface sanded with 220 grit scuff prep 2 surface primed with 459T FASTENER TYPE BENEFITS CONSIDERATIONS Through-Bolting Best mechanical locking system Need back side access to panel Screw-In Anchor Highest pullout strength Requires pilot hole Cup Washer Spreads compressive load Requires relief hole; For substructure and hard point attachment Wide Grip (Bulb-Style) Rivet Ease of use—no installation torque limitations For lower load attachments Sheet Metal or Wood Screw Readily available, low cost Penetrate both skins for improved pullout Shoulder Washer Limits compressive load Requires relief hole; For substructure and hard point attachment For more information on installation, adhesives, and fasteners for specific applications, please contact Avient.

Colorants & Additives for Electrical & Electronic Applications IEC 60695-2, known as the Glow Wire test, and UL 94 are established standards in the Electrical & Electronics industry that ensure plastic parts in electrical and electronic components have been tested for fire resistance in support of safer consumer products. OnColor™ UL 94 Colorants* • More than 2,000 recognized concentrates available worldwide in all color options • HB rating for most of PP, PS, ABS, PC/ABS, PBT, PA, PA-GF, TPU generic resins • V-0, V-1, V-2 and 5VA/5VB ratings for more than 200 specific engineering resins • Master file of recognized concentrates with scope of use accessible in the UL product finder • Development of custom products for specific resins upon request • Compliance Letters available for REACH and RoHS Cesa™ Flame Retardant Additives for Glow Wire • Fire performance in line with different levels of Glow Wire temperatures (IEC 60695-2-12) • Let-Down Ratio adjustable to reach different levels of Glow Wire temperatures • Non-halogen (in accordance with IEC 61249- 2-21) and non-HBCD** solutions • Wide range of solutions adapted to different polymers (PP, PS, PC) • Color and flame retardants can be combined in one product • Compliance Letters available for REACH and RoHS APPLICATION BULLETIN * Solutions also sold as Renol™ UL 94 Colorants APPLICATION POLYMER GWFI TEMPERATURE TYPICAL LET-DOWN RATIO CONTENT HIPS 750–960°C 5–10% Non-HBCD flame retardant** PC 850–960°C 2–4% Non-halogen in accordance with IEC 61249-2-21 PP homopolymer 850–960°C 4% Non-halogen in accordance with IEC 61249-2-21 PP copolymer 850–960°C 4–8% Antioxidant - metal deactivator ** Non-HBCD means that Hexabromocyclododecane (HBCD) is neither used as starting material during the mixing phase of our products nor intentionally added during production, but it cannot be excluded that it is not present at level of ubiquitous traces in any of the raw materials used in manufacturing of our products.

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