Regarding Price Revision for Building Material Product Group

April 14, 2026 Sekisui Chemical Co., Ltd. The procurement environment for vinyl chloride and polyethylene raw materials derived from oil and naphtha has rapidly deteriorated due to instability in the Middle East, leading to a sharp rise in raw material prices and energy costs. While we have diligently promoted cost reduction and business efficiency improvements, this situation has significantly exceeded the limits of our self-help efforts, and we have decided to revise our sales prices as follows. We will continue to strive for stable supply and cost countermeasures, and we kindly ask for your understanding of the circumstances. 1. Effective date of price increase: From shipments on Wednesday, May 20, 2026 2. Target products and price increase range Rain gutters and related products, corrugated sheets: 20% or more Color pipe main body: 30% or more Color joints and related products: 15% or more PVC deck materials, Cregaare, Zetron: 20% or more End Sekisui Chemical Co., Ltd. Corporate Communications Department, Public Relations Group Email: kouhou@sekisui.com