The Composite Release Liners segmentation by application delineates five principal end‑use domains: automotive, aerospace, construction, electronics, and medical. Automotive accounts for the largest share—approximately 35%—driven by high‑volume interior trim, paint‑shop masking, and adhesive‑bonded structural components that demand reliable release performance under variable temperature cycles. Aerospace, contributing roughly 25%, leverages lightweight composite panels and precision‑engineered bonding processes where release liner integrity is critical for safety‑certified assemblies. Construction represents about 20% of the market, primarily in roofing membranes, façade systems, and prefabricated panels where moisture resistance and durability are paramount. Electronics, at 12%, supports flexible circuit boards and encapsulation processes that require low‑particle contamination and exacting release characteristics. The medical segment, though modest at 8%, is expanding due to stringent regulatory standards for sterile packaging and bio‑compatible adhesive applications. Collectively, these application categories shape the overall market size by aligning liner material specifications with sector‑specific performance, cost, and regulatory demands.