About Us
Your Trusted Polyisobutylene Supplier
Founded in 2008 in Jiaxing, Zhejiang, Cenway is a Tsinghua-incubated new materials enterprise integrating R&D, production and sales. We manufacture full grades of high and medium molecular
weight polyisobutylene for industrial, food and pharmaceutical applications worldwide.
Zhejiang Cenway Materials Co., Ltd. was established in July 2008 in Jiaxing Port District China Chemical New Materials (Jiaxing) Park. Cenway is a new material enterprise integrating R&D,
production and sales, incubated by Tsinghua Industrial Development Research Institute. We supply full grades of industrial, food and pharmaceutical grade polyisobutylene to customers
worldwide.
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16+
Years of experience
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107+
R&D talents
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100+
Patents
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500+
Global customers
What We Offer
Polyisobutylene is the product of cationic polymerization of isobutylene monomers, a linear saturated polymer with strong stability to acids, alkalis and salts at room temperature. It delivers outstanding tack, barrier and weatherability across demanding industrial formulations.
High Molecular Weight Polyisobutylene
A rubbery elastomer with a molecular weight (Mv) of >100,000. Excellent heat resistance, UV and ozone aging resistance, gas and moisture barrier properties.
- Virtually tasteless and odor-free
- Very low permeability to gases, water and aqueous solutions
- Glass transition temperature −64°C, keeps elasticity at −50°C
Medium Molecular Weight Polyisobutylene
A transparent viscous or semi-solid polymer with a molecular weight (Mv) of 10,000–100,000. Widely used in oil additives, sealants, adhesives and protective films.
- Excellent atmospheric resistance and durability
- Improves flexibility, weather resistance and adhesion
- Available in industrial, food and pharmaceutical grades
Hot Products
Polyisobutylene Product Range
A complete portfolio of high and medium molecular weight polyisobutylene grades engineered for adhesives, sealants, roofing membranes, insulated glass, lubricants, chewing gum base and protective films. Every batch is tested for molecular weight, volatility and purity before shipment.
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![HB-100 Polyisobutylene For Transdermal Patches]( "HB-100 Polyisobutylene For Transdermal Patches")
HB-100 Polyisobutylene For Transdermal PatchesThe high molecular weight polyisobutylene is a solid rubberlike substance and appears as a transparent non-drying synthetic polyisobutylene polymer, low color,
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![HB-100 Polyisobutylene For Rate Glue & Pest Control Glue]( "HB-100 Polyisobutylene For Rate Glue & Pest Control Glue")
HB-100 Polyisobutylene For Rate Glue & Pest Control GlueThe high molecular weight polyisobutylene is a solid rubberlike substance and appears as a transparent non-drying synthetic polyisobutylene polymer, low color,
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![Polyisobutylene For Insulated Glass Sealant]( "Polyisobutylene For Insulated Glass Sealant")
Polyisobutylene For Insulated Glass Sealantpolyisobutylene-based hot melt sealants specially formulated for use in the production of insulating glass units They should always be used as primary sealants
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![MB-10 Polyisobutylene for Sealents]( "MB-10 Polyisobutylene for Sealents")
MB-10 Polyisobutylene for SealentsPolyisobutylene has excellent atmospheric resistance, aging resistance and durability characteristics, and also has low moisture permeability and no fog smoke,
Chemistry Lights Up a Green Future
Sustainability is integrated into our business strategy, manufacturing processes, and long-term development. We continuously improve energy efficiency, optimize our energy structure, and reduce environmental impact through chemical innovation, process optimization, and renewable energy adoption. Our sustainability practices are supported by recognized environmental and energy management systems, carbon verification, and life cycle assessment.
Our Sustainability Commitments
Energy Efficiency
Improve energy efficiency and reduce unit energy consumption through process and technology optimization.
Green Manufacturing
Promote cleaner production, renewable energy adoption, and continuous improvement across manufacturing operations.
Carbon Management
Strengthen greenhouse gas management through carbon disclosure, emissions verification, and life cycle assessment.
Environmental Management
Operate under established environmental management systems and continuously improve resource and environmental performance.
Why Cenway
Why Choose Us
Cenway combines Tsinghua-backed R&D, 16 years of polyisobutylene manufacturing and a full grade portfolio to serve global buyers. Our ISO-certified plant, 100+ patents and 500+ customers make us a dependable PIB partner across diverse industries.
Tsinghua-Incubated R&D
Backed by Tsinghua Industrial Development Research Institute.
Full Grades of HPIB & MPIB
Industrial, food and pharmaceutical grade polyisobutylene.
100+ Patents & IP Portfolio
Proprietary polyisobutylene production and application processes protected by 100+ granted patents.
16+ Years of Manufacturing
Producing PIB in China since 2008.
500+ Global Customers
Trusted by buyers across Asia, Europe and the Americas.
Certified Quality System
ISO 9001, IATF 16949, ISO 14001, ISO 45001, BRCGS and UK REACH certified.
Video Center
Step inside our polyisobutylene manufacturing and quality testing process. These videos show how we verify molecular weight, volatility and purity, and how HPIB and MPIB are produced under strict quality controls before shipment to customers worldwide.
Audited Manufacturing Facilities
As an ISO 9001 and IATF 16949 certified manufacturer, we maintain strict manufacturing quality. We build every batch with the attitude of letting our product speak for itself, and strive to manufacture to the highest level of quality to meet your unique specifications.
Polyisobutylene Applications Across Industries
Our polyisobutylene serves nine major industries, from roofing membranes and insulated glass to lubricants, adhesives and medical products. Explore how Cenway PIB grades solve real application challenges for manufacturers around the world.
- Typical grades: HB-80, HB-100
- Key benefit: Excellent weather and aging resistance
- Typical grades: HB-100, MB-12
- Key benefit: High dielectric strength
- Typical grades: MB-10, MB-12
- Key benefit: Superior shear stability
- Typical grades: HB-100
- Key benefit: Long-lasting tack
- Typical grades: MB-10, MB-15
- Key benefit: Strong adhesion and flexibility
- Typical grades: MB-15, HB-80
- Key benefit: Reliable surface protection
- Typical grades: MB-12
- Key benefit: Food-grade certified
- Typical grades: HB-100, MB-12
- Key benefit: Excellent damping and tack
- Typical grades: HB-100
- Key benefit: Medical-grade purity
GET IN TOUCH
Request a Free Quote
Tell us your target application, required molecular weight, grade and annual volume, and our engineers will recommend the right polyisobutylene solution and reply with a detailed quotation within 24 hours. OEM and private-label support available.
Blog
News Center
Stay updated with Cenway polyisobutylene insights, industry trends and company milestones. Our articles cover product standards, manufacturing know-how and application guides for buyers, formulators and distributors worldwide.
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![Best Medium Molecular Weight Polyisobutylene Manufacturers in China]()
Jun30, 2026Best Medium Molecular Weight Polyisobutylene Manufacturers in ChinaMedium molecular weight polyisobutylene (MMW PIB) is a transparent viscous or semi-solid polymer with molecular weights ranging from 10,000 to 100,000, prize...
read more -
![Best High Molecular Weight Polyisobutylene Manufacturers in China]()
Jun27, 2026Best High Molecular Weight Polyisobutylene Manufacturers in ChinaHigh molecular weight polyisobutylene (HMW PIB) is a synthetic elastomer produced through cationic polymerization of isobutylene, exhibiting exceptional gas ...
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![The Best Medium Molecular Weight Polyisobutylene Plant in China]()
Aug28, 2025The Best Medium Molecular Weight Polyisobutylene Plant in ChinaMedium Molecular Weight Polyisobutylene (MMPIB) is a critical performance additive, prized for its superior tackifying, sealing, and viscosity-modifying prop...
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![Top 10 High Molecular Weight Polyisobutylene Factories in China]()
Aug20, 2025Top 10 High Molecular Weight Polyisobutylene Factories in ChinaHigh molecular weight polyisobutylene (HPIB) is a crucial specialty chemical, prized for its exceptional gas barrier properties, water resistance, and high-t...
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