Kingflex
Explore our leading collection of elastomeric sheets, rolls, and pre-formed tubes engineered for rigorous mechanical, building envelope, and cryogenic applications.
As international energy conservation codes tighten under global climate mandates, the demand for advanced building envelopes has escalated. Modern architecture relies heavily on high-performance cavity wall insulation to mitigate thermal bridging, restrict uncontrolled airflow, and reduce the overall carbon footprint of HVAC infrastructure. In commercial complexes, municipal projects, and manufacturing installations, thermal efficiency directly dictates long-term operational costs.
B2B buyers, engineering contractors, and energy efficiency consultants face a complex dynamic: balancing strict structural criteria (such as BS 476, UL 94, and ASTM fire ratings) with procurement cost management. Obtaining direct-from-factory quotes from established Chinese manufacturers allows major developers to maintain strict product compliance while optimizing supply-chain expenditures. Elastomeric rubber foam is emerging as a premier choice for these cavity systems due to its superior moisture resistance and ease of installation compared to traditional fibrous insulation.
Established by the prestigious Jinwei Group (founded in 1979), Kingflex Insulation Co., Ltd. represents over 40 years of pioneering research and development in green thermal insulation materials. We were the first thermal insulation manufacturer established north of the Yangtze River, positioning us as an industry benchmark in China's building materials capital: Dacheng, Hebei.
Kingflex is a vertically integrated design, production, and exporting enterprise focused on environmental protection and resource conservation. Guided by the core concepts of energy efficiency and high performance, we provide end-to-end solutions spanning scientific research, customized development, factory fabrication, installation training, and globally certified testing protocols. Our systems are engineered to address building thermal loss, industrial cold chain preservation, and HVAC system insulation.
Kingflex elastomeric rubber foam insulation is engineered to resolve the issues of moisture absorption, thermal transfer, and fire vulnerability common in traditional systems.
The highly consistent cellular structure minimizes moisture absorption, preventing convective heat transfer within the wall cavity and ensuring stable thermal conductivity (λ-value) over years of service.
Our elastomeric compound is formulated to comply with BS 476 Part 7 Class 1 and UL 94, offering self-extinguishing capabilities and preventing the propagation of fire in building cavities.
Boasting a compression resilience rate exceeding 80%, Kingflex rubber foam sheets and tubes maintain their structural thickness and technical properties despite building settling and pressure variations.
The construction industry is shifting from prescriptive material sourcing to performance-based specifications. In cavity wall configurations, traditional mineral wool or fiberglass can suffer from structural sag and moisture absorption over time, compromising thermal efficiency. Kingflex closed-cell rubber foam provides a stable, mold-resistant alternative that retains its dimensional stability for 10 to 15 years.
Technical Roadmap: Our research team is focused on enhancing three key technical dimensions:
By designing materials that combine thermal resistance, sound attenuation, and moisture control into a single layer, we help developers reduce installation labor, simplify site logistics, and lower overall system costs.
In building insulation procurement, verified compliance is critical. Kingflex maintains systematic quality controls across all stages of production. Our facility is designated by the Chinese Ministry of Energy, Ministry of Electric Power, and Ministry of Chemical Industry as a trusted partner for key infrastructure projects.
Our products undergo testing by recognized third-party agencies to ensure they meet global safety standards. Our active certifications include:
Additionally, Kingflex implements complete batch traceability, allowing each shipment of rolls, sheets, or tubes to be tracked back to the raw material lot and specific manufacturing line.
With an annual output exceeding 600,000 cubic meters, Kingflex maintains continuous supply capacity for large-scale international commercial projects.
Kingflex operates 5 automated extrusion and expansion assembly lines. This automated manufacturing setup ensures consistent polymer density, cell sizing, and thickness across every production run.
Our dedicated technical testing lab monitors thermal performance using heat flow meter technology. This enables us to guarantee stable thermal conductivity (λ ≤ 0.034 W/m·K at 0℃) for all shipments of Kingflex rubber foam sheets and tube products.
Kingflex products are specified in infrastructure projects, district heating networks, industrial cleanrooms, and commercial structures worldwide.
Our elastomeric materials are engineered for direct application across diverse construction and industrial sectors:
Designed with a standard density of 40-55kg/m³ and thickness options ranging from 6mm to 50mm, our sheets provide a robust vapor barrier for cavity walls, roofing assemblies, and massive commercial HVAC ductwork systems.
Featuring inner diameters from 6mm up to 114mm and wall thicknesses of 9mm to 40mm, these pre-slit or solid tubes are engineered for hot/cold water pipelines, mechanical pipe loops, and cooling units, reducing the risk of pipe sweating and freezing.
Available with optional factory-applied double-sided self-adhesive backings and high-reflectivity aluminum foil facings, these products enhance mechanical strength, surface UV resilience, and vapor barrier efficiency in exposed outdoor areas.
We welcome international project engineers, procurement executives, and distributors to visit our factory. Understanding our automated mixing lines, foaming ovens, and QA testing protocols provides confidence in our capacity to support large-scale projects.
Our dedicated international sales team manages the export process, including custom packaging, container loading optimization, and custom clearance documentation. We provide regular status updates from order placement to shipping port arrival to ensure reliable delivery schedules.
Browse our specialized rubber foam tubes, sheets, and cryogenic solutions manufactured to international standards.
Our facility operates under an ISO-certified management system, monitoring polymer blending, extrusion, expansion, and finishing stages.
Find technical answers on material chemistry, installation standards, and custom ordering procedures for building projects.
It is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation (including cavity walls, roofs, and basements), industrial pipeline cold insulation, and sound attenuation systems.
Yes. Our rubber foam insulation contains built-in flame retardants, meeting international fire safety standards including BS 476 Part 7 Class 1 and UL 94 classification. It is self-extinguishing when exposed to fire.
Rubber foam has a flexible, closed-cell structure that resists moisture penetration, making it ideal for HVAC, cold piping, and cavity walls. Rock wool is a fibrous material with high temperature resistance, suitable for industrial high-heat pipes and specialized fire barriers.
Yes. We offer comprehensive OEM/ODM services, allowing customization of thicknesses (6mm to 50mm), pipe inner diameters (6mm to 114mm), adhesive backings, and aluminum foil protective facings to meet specific project criteria.
Our products are certified to BS 476, CE, REACH, RoHS, UL 94, and ASTM standards. This ensures compatibility with international environmental, building code, and safety regulations.
Yes. We implement a systematic tracking process. Each production run is documented with raw material inputs, processing parameters, and QA test records to ensure consistency.
Our production lines can fabricate elastomeric sheets and rolls in thicknesses ranging from 6mm to 50mm.
When installed according to technical guidelines and protected from mechanical wear or harsh weather, Kingflex rubber foam insulation maintains its performance for 10 to 15 years.