Premium selection of standard and custom-engineered elastomeric and mineral fiber insulation materials designed for extreme service temperatures.
Industrial thermal and cryogenic insulation has evolved from simple energy containment to a critical pillar of environmental management, system stability, and structural longevity. Across commercial HVAC, deep cryogenic cooling in chemical processing, and massive mechanical operations, modern buildings and production processes demand thermal barriers that perform under extreme conditions without degradation.
High performance closed-cell elastomeric rubber foam insulation acts as a primary defense against two major issues: heat loss and moisture infiltration. Condensation control is imperative; failure to prevent thermal bridging leads to damp pipelines, mold development, and catastrophic Corrosion Under Insulation (CUI). Our products prevent moisture ingress, preserving operational efficiency while lowering carbon footprint.
A deep heritage combined with modern technological R&D ensures Kingflex remains at the forefront of global insulating material supplies.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Our advanced research, development, and high-capacity production facility is located in Dacheng, China—the well-known green-building materials capital. As an energy-saving and environmentally friendly enterprise, we concentrate on the development, production, and worldwide sales of advanced elastomeric materials.
Operating with energy conservation and consumption reduction as our core concepts, we provide complete, integrated solutions. Our team guides clients from preliminary specification consultation, custom R&D, and bulk manufacturing to detailed installation guidance and responsive post-sale services. We lead the global building materials industry with top-tier supply logistics and reliable product performance.
Our parent company, Jinwei Group, established its first operations, building a solid baseline for structural insulation materials production.
Becoming the very first manufacturer of thermal insulation materials north of the Yangtze River, paving the way for regional industrial energy savings.
Forming the dedicated Kingflex division to export our products worldwide, obtaining crucial global fire protection and environmental certificates.
Exporting to more than 66 countries with an annual output exceeding 600,000 cubic meters, powered by fully automated assembly lines.
Cubic Meters
Annual Production CapacityYears History
Established in 1979 by Jinwei GroupCountries Served
Global Export FootprintSkilled Staff
8 R&D Engineers & 6 Global ConsultantsA deep dive into the chemical composition and thermal capabilities of Kingflex elastomeric NBR/PVC and Rock Wool materials.
The core formulation of Kingflex elastomeric insulation involves a co-polymer blend of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC). NBR delivers structural elasticity, resistance to oil, and thermal resilience, while PVC enhances the compound's overall mechanical stability and flame-retardant performance.
During our continuous high-pressure gas expansion process, millions of micro closed-cells are created. These isolated pockets trap gas within, drastically reducing convective heat transmission. The absence of interconnected voids prevents capillary moisture absorption, guaranteeing long-lasting thermal protection.
| Physical Parameter | Standard Specification | ASTM / EN Test Standard |
|---|---|---|
| Material Base | Premium NBR/PVC Compound | - |
| Thickness Range | 6mm - 50mm (Sheets & Rolls) | - |
| Inner Diameter (Pipes) | 6mm - 114mm (ID) | - |
| Foamed Density | 40 - 55 kg/m³ | ASTM D1622 |
| Service Temperature Range | -40℃ to 105℃ (Extended for Cryogenic) | ASTM C411 |
| Thermal Conductivity (0℃) | ≤ 0.034 W/(m·k) | ASTM C177 / C518 |
| Water Vapor Permeability | ≥ 1.0 x 10¹⁰ (Metric Perm-in) | ASTM E96 |
| Flame Spread / Smoke Index | Class 1 / Class V-0 | UL94 / BS 476 Part 7 |
For operations exceeding the limits of elastomeric foams (above 105°C), Kingflex supplies premium Rock Wool Thermal Insulation Blankets. Spun from natural basalt stone and slag, these inorganic fibers are bonded together with thermosetting resins, forming a lightweight, flexible, and extremely heat-resistant barrier.
Our Rock Wool blankets are ideal for high-temperature steam lines, power generators, oil refineries, and building partition walls requiring strict acoustic damping and fire protection.
By manufacturing in Dacheng, China—the country's hub for green building materials—Kingflex benefits from an optimized industrial ecosystem. We secure raw materials, energy feeds, and chemical supplies directly from local networks, drastically lowering internal logistics costs and transit overheads.
Operating 5 large-scale, automated production lines, we ensure steady throughput without raw material shortages. This vertically integrated manufacturing model shields our global procurement clients from pricing spikes and unexpected delays, offering consistent price stability and production scalability.
Adapting thermal barriers to regional climates, humidity levels, and specialized commercial layouts.
In hot, high-humidity regions like Southeast Asia and the Middle East, commercial air conditioning pipes sweat immediately upon contact with ambient air. Kingflex closed-cell rubber foam, with its high moisture resistance factor (μ ≥ 10,000), stops condensation from forming, preventing drywall damage and preserving systemic thermal performance.
Handling liquified gases at extremely low temperatures requires specialized insulation systems to prevent ambient heat leakage. The Kingflex Dienes series is specifically designed for cryogenic setups down to -200℃. Its unique flexibility prevents material cracking due to contraction cycles, preserving energy efficiency at terminal storage points.
Our open-cell structures excel in noise damping applications, particularly in machine rooms, hospitals, and busy commercial ventilation shafts. By combining elastomeric foam with dense acoustic barriers, we absorb airborne and vibration-induced sound, maintaining quiet environments in sensitive public and residential areas.
Our R&D department is focused on sustainable manufacturing processes and next-generation chemical formulations.
As international green building certifications (such as LEED and BREEAM) grow more stringent, standard chemical foaming agents must evolve. Our R&D engineers are developing zero-halogen, bio-based elastomeric options. Eliminating bromine and chlorine ensures that in a fire event, the insulation releases minimal toxic gas, improving indoor air quality and public safety.
By upgrading our automated line extruders, we also minimize energy waste during the curing stage. Kingflex is committed to carbon-neutral production, helping global partners meet strict environmental standards and reduce lifecycle carbon footprints.
Our products are certified by recognized international testing agencies, ensuring reliability in demanding industrial settings.
Certified under BS 476 (Class 0/Class 1) and UL94 vertical burning tests. Our materials are self-extinguishing, do not drip flame particles, and limit smoke generation, ensuring compliance with strict international safety codes.
Our formulations are REACH, RoHS, and CE certified. Free from chlorofluorocarbons (CFCs) and volatile organic compounds (VOCs), our insulation is safe for schools, food plants, and cleanroom installations.
Every product batch is marked with code indicators, providing raw-material and manufacturing-run traceability. In the event of a field audit, batch numbers trace back to physical test results, verifying consistency and quality.
Actual on-site documentation showing project execution, product applications, and client validation.
Specifically engineered for large-diameter ducts and flat industrial surfaces, our NBR/PVC elastomeric rolls offer seamless protection against thermal transfer.
These pre-formed tubes slide easily over standard copper, steel, or plastic pipes, cutting installation time and labor in half.
Clear, direct, and expert-verified answers to common technical queries about elastomeric rubber foam and rock wool insulation products.
Elastomeric rubber foam is a synthetic rubber-based insulator with a closed-cell structure. It is primarily used to insulate HVAC ductwork, commercial air conditioning pipes, building envelopes, sound-damping panels, and industrial refrigeration/process pipelines. Its main purpose is preventing condensation on cold lines and reducing thermal transmission on warm systems.
Yes. Our formulation contains flame-retardant additives that comply with global fire protection codes (e.g., BS 476 Class 0, UL94 Class V-0, and ASTM E84). It self-extinguishes upon flame removal and does not feed propagating fire fronts, ensuring high occupant safety.
Rubber foam is a flexible, closed-cell polymer that resists moisture transmission, making it ideal for systems prone to condensation, like HVAC and refrigeration. Rock wool is an inorganic mineral fiber that can withstand temperatures exceeding 1000°C, making it better suited for high-temperature steam pipelines, power plants, and structural fire protection.
Yes. We offer full OEM and ODM services, allowing customers to customize thickness (from 6mm to 50mm), internal diameters for tubes, color, self-adhesive backings, and exterior protective foils to match local project specifications.
Our products carry certifications from multiple international testing agencies, including BS 476, CE, REACH, RoHS, UL94, and ASTM. This guarantees compliance with quality, environmental, and safety standards globally.
Yes. Every production run is printed with batch and traceability codes. This allows us to track raw materials, manufacturing shifts, and QC test parameters for every shipment sent to our clients.
We manufacture sheet rolls in thicknesses ranging from 6mm to 50mm, providing flexibility for applications from basic residential duct liners to heavy industrial lagging.
Under normal operational conditions and when properly installed, Kingflex elastomeric materials have an estimated service life of 10 to 15 years, maintaining consistent thermal barrier properties throughout their lifespan.
Select from our targeted NBR/PVC elastomeric series, sound absorption systems, and rock wool blankets to match your exact application.
Kingflex
