The global Highly Reactive Polyisobutylene Market size is projected to reach US$ 937.87 million by 2034 from US$ 613.71 million in 2025. The market is anticipated to register a CAGR of 4.8% during the forecast period 2026–2034. Highly reactive polyisobutylene (HR-PIB)—featuring a high content of terminal vinylidene double bonds—is an advanced specialty polymer widely used as...