MARKET INSIGHTS

Global Styrene-Isoprene-Styrene Block Copolymer (SIS) market size was valued at USD 1.52 billion in 2024. The market is projected to grow from USD 1.61 billion in 2025 to USD 2.45 billion by 2032, exhibiting a CAGR of 5.4% during the forecast period.

Styrene-Isoprene-Styrene (SIS) is a high-performance thermoplastic elastomer characterized by its unique combination of high strength, low hardness, and excellent viscosity properties. As the softest variant among styrenic block copolymers, SIS polymers are widely utilized in pressure-sensitive adhesives, asphalt modification, and specialized plastic applications. The material’s molecular structure – alternating blocks of styrene and isoprene – enables exceptional elastic recovery and processing versatility.

Styrene-Isoprene-Styrene Block Copolymer (SIS) Market – View in Detailed Research Report

Top 10 Companies in the Styrene-Isoprene-Styrene Block Copolymer (SIS) Market (2026)

1️⃣ Kraton Corporation

Headquarters: Kalamazoo, Michigan, USA
Key Offering: Specialty polymers, high-value SIS grades, custom formulations.

Kraton has led the SIS market with a robust portfolio of linear and radial SIS products. Recent capacity expansions in 2025 and 2026, including a new 200,000 t/yr plant in Michigan, reinforce its market leadership. The company focuses on high-performance grades for automotive, packaging, and construction applications.

Sustainability & Growth Initiatives:

• Investing in bio‑based feedstock research to reduce carbon footprint.
• Expanding renewable SIS lines for automotive lightweighting.
• Strategic partnerships with Tier‑1 automotive suppliers.

2️⃣ TSRC Corporation

Headquarters: Taipei, Taiwan
Key Offering: Advanced thermoplastic elastomers, custom SIS blends.

TSRC has positioned itself as a key player in Asia‑Pacific, leveraging integrated production capabilities to supply high‑performance SIS for packaging and construction markets.

Sustainability & Growth Initiatives:

• Developing high‑performance SIS grades with superior UV and thermal stability.
• Investing in energy‑efficient manufacturing processes.
• Collaborating with local governments on infrastructure projects.

3️⃣ LCY Technology Corp.

Headquarters: Taichung, Taiwan
Key Offering: Linear and radial SIS, specialty elastomers.

LCY focuses on high‑quality SIS for automotive interior components and pressure‑sensitive adhesives, with a strong emphasis on product differentiation.

Sustainability & Growth Initiatives:

• Adopting green chemistry principles in SIS synthesis.
• Expanding production capacity in response to rising demand.
• Partnering with OEMs to develop low‑VOC adhesive solutions.

4️⃣ Sinopec

Headquarters: Beijing, China
Key Offering: Petrochemical feedstocks, SIS production.

Sinopec’s vast petrochemical infrastructure enables it to supply raw materials and SIS products at competitive prices, supporting the growing Chinese market.

Sustainability & Growth Initiatives:

• Investing in renewable feedstock projects.
• Reducing VOC emissions across production sites.
• Expanding capacity for high‑performance SIS in 2025‑2026.

5️⃣ Zeon Corporation

Headquarters: Tokyo, Japan
Key Offering: Advanced elastomers, specialty SIS.

Zeon supplies high‑quality SIS for automotive, packaging, and construction sectors, with a focus on performance and sustainability.

Sustainability & Growth Initiatives:

• Developing bio‑based isoprene routes.
• Enhancing energy efficiency in manufacturing.
• Collaborating with OEMs for lightweight vehicle components.

6️⃣ Versalis (Eni)

Headquarters: Milan, Italy
Key Offering: Petrochemical products, SIS manufacturing.

Versalis leverages its European footprint to supply SIS for automotive, packaging, and construction markets.

Sustainability & Growth Initiatives:

• Investing in low‑carbon production technologies.
• Expanding high‑performance SIS lines for automotive use.
• Reducing waste through circular economy practices.

7️⃣ Ningbo Jinhai Chenguang Chemical

Headquarters: Ningbo, China
Key Offering: Cost‑effective SIS, packaging and sealant grades.

This regional player focuses on meeting the robust domestic demand for SIS used in adhesives and asphalt modification.

Sustainability & Growth Initiatives:

• Optimizing production efficiency to lower energy use.
• Developing low‑VOC adhesive formulations.
• Expanding production capacity in 2025‑2026.

8️⃣ Guangdong Sunion Chemical

Headquarters: Guangzhou, China
Key Offering: SIS for packaging and construction applications.

Sunion supports the growing Chinese market with affordable SIS products and rapid delivery.

Sustainability & Growth Initiatives:

• Implementing energy‑saving technologies.
• Developing high‑performance SIS for automotive use.
• Strengthening supply chain resilience.

9️⃣ Zibo Luhua Hongjin New Material

Headquarters: Zibo, China
Key Offering: Specialty SIS for sealants and asphalt modifiers.

With a focus on performance, Zibo Luhua delivers SIS solutions tailored for infrastructure projects.

Sustainability & Growth Initiatives:

• Investing in renewable feedstock sourcing.
• Reducing process emissions through advanced catalysts.
• Expanding production capacity to meet demand.

🔟 Zhejiang Zhongli Plastic & Rubber

Headquarters: Zhejiang, China
Key Offering: Linear and radial SIS for diverse end‑uses.

Zhejiang Zhongli provides high‑quality SIS for packaging, automotive, and construction markets, emphasizing product consistency.

Sustainability & Growth Initiatives:

• Adopting green manufacturing practices.
• Developing bio‑based SIS variants.
• Strengthening R&D for high‑performance grades.

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Market Outlook (2025‑2034)

Based on current growth drivers, the SIS market is expected to expand from USD 1.61 billion in 2025 to USD 3.10 billion by 2034, maintaining a CAGR of approximately 5.6% over the forecast horizon. Key growth factors include continued packaging demand, infrastructure development, and the automotive industry’s push for lightweight, high‑performance elastomers.

Future Trends Shaping the SIS Landscape

1. Advanced Asphalt Modifiers: Increased adoption of SIS in bitumen formulations to improve road durability and reduce maintenance costs.

2. Automotive Lightweighting: Growing use of SIS in interior components, seals, and plastic parts to meet fuel‑efficiency targets.

3. Healthcare & Hygiene Applications: Expansion of high‑purity SIS grades for medical adhesives, wound care, and disposable hygiene products.

4. Sustainable Production: Development of bio‑based isoprene routes and greener SIS formulations to address environmental regulations.