Kingflex Group — established by Jinwei Group with over 45 years of heritage — delivers premium elastomeric rubber foam insulation, rock wool products and integrated energy-saving systems to 88+ countries worldwide.
Kingflex is established by Jinwei Group, which carries more than 45 years of history. Kingway Group was established in 1979 and was the first manufacturer of thermal insulation materials north of the Yangtze River — a milestone that set the foundation for decades of innovation, expansion, and global leadership in energy-saving insulation systems.
Over four decades, Kingflex has grown from a regional pioneer into an internationally recognized brand, earning designations from China's Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry as a trusted, certified production enterprise.
First insulation manufacturer north of the Yangtze River, building a legacy of quality and innovation.
Kingflex products have been exported to more than 88 foreign countries across 6 continents over the past 16+ years.
Officially designated by China's Ministry of Energy, Electric Power, and Chemical Industry for premium production standards.
Our employees are amazing in their own right, but together they are what makes Kingflex such a fun and rewarding place to work. Kingflex team is a tight-knit, talented group with a shared vision of giving consistently first class service for our clients.
Kingflex has eight professional engineers in the R&D Department, 6 professional international sales specialists, and 230 skilled workers in the production department — all dedicated to delivering world-class insulation solutions.
At present, Kingflex operates 5 large automatic assembly lines, with an annual production capacity of more than 600,000 cubic meters — making Kingflex a designated production enterprise by China's Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry.
State-of-the-art fully automated production lines ensuring consistent product quality and high throughput for global orders.
Over 600,000 cubic meters of thermal insulation products produced annually, meeting the demands of large-scale construction and industrial projects worldwide.
Kingflex products have been exported to more than 88 foreign countries over the past 16 years, establishing a truly global supply chain.
Kingflex thermal insulation products are widely used in construction, petroleum, chemical, national defense, aerospace and other industries. Our comprehensive product range includes elastomeric rubber foam insulation tubes, sheets, pipes, and rock wool insulation boards and blankets — all manufactured to meet the most stringent international standards including BS 476, CE, REACH, RoHS, UL94, and ASTM.
Supply customers all over the world with a full set of energy saving insulation system solutions. Kingflex is an integrated solution provider of thermal insulation, cold insulation and noise reduction for buildings and industries.
Kingflex's dedicated R&D department, led by eight professional engineers, continuously develops and refines insulation formulas to improve thermal performance, fire resistance, and environmental compliance — keeping Kingflex at the forefront of the global insulation industry.
Closed cell rate over 98%, ensuring superior thermal insulation, moisture resistance, and long-term stability of λ values.
All products are flame retardant and self-extinguishing, meeting BS 476, UL94, and other international fire safety standards.
Products perform reliably from -40°C to +105°C, suitable for both cryogenic cold insulation and high-temperature applications.
Compression resilience over 80%, maintaining structural integrity and thermal performance throughout the product's 10–15 year service life.
Full OEM service available — custom dimensions, densities, and surface finishes to meet specific project requirements worldwide.
Every Kingflex product carries full traceability documentation, ensuring accountability from raw material sourcing to final delivery.
Kingflex products have passed BS 476, CE, REACH, RoHS, UL94, ASTM, and other international certifications, ensuring product quality and compliance with global building and industrial safety standards. Our certifications reflect our unwavering commitment to quality, safety, and environmental responsibility.
From R&D innovation to global logistics, every aspect of Kingflex's operation is engineered to deliver maximum value, reliability, and performance to clients worldwide.
8 professional engineers continuously innovate to improve product formulations, ensuring Kingflex stays ahead of evolving industry standards and customer requirements.
5 automated assembly lines with 600,000+ m³ annual capacity ensure fast lead times and consistent supply for large-scale construction and industrial projects.
BS 476, CE, REACH, RoHS, UL94, ASTM certifications guarantee that every product meets the safety and quality requirements of your local market.
Over 16 years of exporting to 88+ countries, with established logistics networks and deep understanding of international trade compliance and documentation.
Full OEM service with custom dimensions from 6mm to 50mm thickness, multiple densities, and tailored surface treatments to meet your exact project specifications.
Every Kingflex product is fully traceable from raw material to delivery, providing complete accountability and peace of mind for quality-critical applications.
From elastomeric rubber foam insulation tubes and pipes to rock wool boards and blankets, Kingflex offers a comprehensive product range for HVAC, construction, industrial, and specialty applications across the globe.
| Material | NBR/PVC |
| Thickness | 6mm – 50mm |
| Density | 40–55 kg/m³ |
| Temp. Range | -40°C to +105°C |
| Closed Cell Rate | Over 98% |
| Compression Resilience | Over 80% |
| Material | NBR/PVC |
| Wall Thickness | 9mm – 40mm |
| Inner Diameter (ID) | 6mm – 114mm |
| Density | 40–55 kg/m³ |
| Temp. Range | -40°C to +105°C |
| Closed Cell Rate | Over 98% |
Our state-of-the-art manufacturing campus in China houses 5 automated assembly lines, advanced quality control laboratories, and a dedicated R&D center — all working together to deliver premium insulation products to customers in 88+ countries.
Our customers across 88+ countries consistently praise Kingflex for product quality, reliable delivery, and responsive after-sales support. Here are real chat conversations and feedback from our valued international clients.
From HVAC systems in luxury hotels to industrial pipeline insulation in petrochemical plants — Kingflex insulation solutions are trusted by contractors, engineers, and facility managers across the globe.
Have questions about our products, certifications, or services? Find quick answers to the most common questions from our global clients below.
Join thousands of satisfied clients in 88+ countries who rely on Kingflex for energy-saving insulation solutions. Request your free product catalog or send us an inquiry today.
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