Synthomer plc
External Appointment

Synthomer (the "Company") announces, in accordance with Listing Rule 9.6.14R(2), that Ian Tyler, Non-Executive Director and Senior Independent Director of the Company, is to be appointed Non-Executive Director and Chair Designate of Grafton Group plc ("Grafton") with effect from 1 March 2024, and he will assume the role of Chair of Grafton with effect from 2 May 2024.

Further information:

Investors: Faisal Tabbah, Vice President Investor Relations Tel: +44 (0) 1279 775 306

Media: Charles Armitstead, Teneo Tel: +44 (0) 7703 330 269

Notes

Legal Entity Identifier (LEI): 213800EHT3TI1KPQQJ56. Classification as per DTR 6 Annex 1R: 3.1.

Synthomer plc is a leading supplier of high-performance speciality polymers and ingredients for coatings, construction, adhesives, and healthcare end markets. Headquartered in London, UK and listed there since 1971, we employ around 4,400 employees across nearly 40 locations across Europe, USA and Asia. With more than 6,000 customers and £2.4bn in continuing revenue in 2022, our three divisions are aligned to our end markets which play an important role in global megatrends including urbanisation, climate change, and economic and demographic shifts. In Coatings & Construction Solutions, our tailored solutions enhance the sustainability and performance of a range of products such as architectural and masonry coatings, mortar modification, fibre bonding, waterproofing and flooring, while our energy solutions promote drilling stability in the challenging operating environments of the oil and gas industry. Adhesive Solutions is a leading supplier of products that bond, modify and compatibilise surfaces and components for a range of end markets including tapes and labels, packaging, hygiene, tyres and plastics. In Health & Protection and Performance Materials we are a world-leading supplier of water-based polymers for medical gloves and a major European manufacturer of high-performance binders, foams and other products for a range of niche applications. Our purpose is creating innovative and sustainable solutions for the benefit of customers and society. Around 20% of our sales volumes are from new and patent protected products. At our innovation hubs in the UK, Germany, Malaysia and Ohio, USA we collaborate closely with our customers to develop new products tailored to their needs while also minimising environmental impact. We are working to embed sustainability in everything we do; we have reduced our scope 1 and 2 carbon footprint by one third since 2019, and our 2030 decarbonisation targets have been approved by the Science Based Targets initiative as being in line with what the latest climate science says is necessary to meet the goals of the Paris Agreement. Since 2021 we have held the London Stock Exchange Green Economy Mark, which recognises green technology businesses making a significant contribution to a more sustainable, low-carbon economy. Find us at www.synthomer.com or search for Synthomer on LinkedIn.