Kingflex
Explore our leading range of high-density flexible rubber foam products engineered for superior sound absorption and temperature management.
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Kingflex Insulation Co., Ltd. is a globally recognized manufacturing and trading combination specializing in premium thermal and acoustic insulation products. Located within Dacheng, China—known as the capital of green-building materials—our state-of-the-art research, development, and manufacturing facility is dedicated to energy-saving and environmental sustainability.
By positioning energy conservation and carbon footprint reduction as our core concepts, we offer total consulting, custom product formulation, specialized production, installation assistance, and thorough post-sale support. We lead the building materials sector towards circular and green growth.
Providing the industry with unmatched insights on how flexible closed-cell elastomers perform under complex acoustic, structural, and thermodynamic stresses.
Unlike standard open-cell materials that allow sound waves to pass freely through porous pathways, Kingflex's engineered open and closed-cell hybrids actively redirect and absorb acoustic energy. This unique cell layout maximizes sound transmission loss (STL) across low-to-mid frequencies, damping impact noise in multi-floor residential buildings.
By decoupling the floor surface from the subfloor, our sound-absorbing floor insulation reduces impact sound transmission (classified under Impact Insulation Class - IIC). The high elasticity, combined with a compression resilience rating above 80%, allows it to absorb heavy impacts without degrading over its 15-year operational lifecycle.
Tested to stringent BS 476, UL94, and ASTM fire protection criteria, our elastomeric rubber foam exhibits exceptional self-extinguishing capabilities. Additionally, its closed-cell layout behaves as a built-in vapor barrier, avoiding condensation, mold growth, and water damage within subfloor cavities.
Kingflex was founded by the Jinwei Group, an enterprise boasting more than 40 years of industrial heritage. Established in 1979, Jinwei Group was the first pioneer manufacturer of thermal insulation materials north of the Yangtze River.
Building on decades of thermodynamic expertise, Kingflex emerged as a focused powerhouse targeting high-end elastomeric rubber foam. Today, we bridge legacy engineering knowledge with modern smart-manufacturing processes to deliver high-performing soundproof floor underlayment and industrial insulation systems globally.
How our advanced production lines and robust supply chains translate into stable prices, premium quality, and prompt deliveries for bulk purchasers worldwide.
Kingflex maintains 5 massive automatic assembly lines yielding an annual capacity of over 600,000 cubic meters. Our system integrates automated raw material dosing, exact mechanical foaming, and real-time thickness calibration.
These automated capabilities minimize human error and ensure exceptional density uniformity (ranging from 40 to 55 kg/m³) and consistent sound absorption indices across production batches.
By consolidating material sourcing, bulk foaming, processing, and customs logistics, we insulate global buyers from supply chain shocks. Kingflex is a designated production enterprise certified by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry in China.
This high-level institutional alignment guarantees a steady supply of top-tier inputs, priority logistics routes, and customs handling—ensuring that large commercial orders ship on time, every time.
Review the technical data of our primary products. Engineered to perform reliably across demanding residential, commercial, and industrial settings.
Engineered for large-area floor, duct, and wall treatments. The continuous roll layout minimizes seams, cutting down acoustic and thermal leakage paths.
| Parameter | Specifications & Limits |
|---|---|
| Material | Premium NBR/PVC Blend Elastomer |
| Thickness | 6mm to 50mm |
| Density Range | 40 - 55 kg/m³ |
| Operational Temperature | -40℃ to 105℃ |
| Closed-Cell Rate | ≥ 98% |
| Fire Rating | Class 0 / Class 1 (BS 476 Part 6/7) |
Specially manufactured for mechanical piping, drainage, and plumbing runs. Curbs vibration transfer and acoustic resonance through building frameworks.
| Parameter | Specifications & Limits |
|---|---|
| Material | Premium NBR/PVC Blend Elastomer |
| Thickness | 9mm to 40mm |
| Inner Diameter (ID) | 6mm to 114mm |
| Density Range | 40 - 55 kg/m³ |
| Foaming Uniformity | Fine Micro-Cell Structure |
| Moisture Resistance | Very High Resistance Factor (μ ≥ 10,000) |
Innovation keeps Kingflex at the forefront of the global building materials sector. Our R&D facility houses 8 professional research engineers focused on optimizing polymers, developing eco-friendly blowing agents, and conducting rigorous acoustic and thermal testing.
To serve customers in over 66 countries, our products adhere to strict local and international regulatory frameworks. We maintain up-to-date compliance certifications to guarantee project approvals worldwide.
How Kingflex insulation materials integrate into complex modern structural, acoustic, and thermodynamic projects.
Whether wrapping central air duct networks or insulating chilled water pipelines, Kingflex rubber foam prevents energy loss and eliminates condensation. It absorbs low-frequency rumble and dynamic vibration inside air handling units and mechanical closets.
Excellent under hardwood, laminate, or luxury vinyl tile (LVT). Our open and closed-cell structures reduce structure-borne impact noise, helping multi-family and commercial developments hit strict IIC and STC code requirements.
Specially formulated cryogenic NBR variants retain flexibility at extremely low temperatures. They prevent stress cracking and maintain thermal resistance in LNG systems, pharmaceutical cold storage, and chemical processing facilities.
Our employees are exceptional experts in their fields, working together to make Kingflex a progressive, rewarding place to work.
The Kingflex family is a close-knit, highly skilled team united by a single vision: providing first-class service to our clients. Our staff includes 8 dedicated engineers in the R&D department, 6 professional international sales specialists, and 230 production workers keeping our lines running smoothly.
We keep your projects compliant, safe, and future-proof with our forward-looking product development strategies.
Kingflex continuously invests in developing next-generation bio-based elastomeric foams and advanced low-smoke, non-toxic formulations. Our roadmap prioritizes lower carbon emissions during manufacturing, zero VOC output, and easier integration with smart building monitoring systems.
With global warehouses and logistics support, we help developers navigate international compliance, provide localized design files, and supply the test documentation needed for smooth building approvals.
Our solutions deliver reliable results, validated by real project installations and consistent positive feedback from international contractors.
Kingflex materials are used in major public utilities, commercial high-rises, and cryogenic projects across Europe, the Americas, and Southeast Asia. We supply both standardized items and custom-tailored runs to match project-specific parameters.
We value clear communication, transparency, and responsive service. These screenshot highlights showcase our collaborative approach to sorting out custom specifications, delivery updates, and quality checks.
Helping procurement heads, developers, and engineers customize density, dimensions, and fire-ratings for large-scale projects.
We produce custom thicknesses from 6mm to 50mm, along with non-standard pipe inner diameters (IDs) to fit specialized HVAC and industrial equipment configurations.
Our team supports private labeling, custom surface embossing, and specialized outer coatings (like aluminum foil or weather-resistant layers) to meet target specifications.
From technical drawings to final container logistics and customs documentation, we deliver a seamless B2B sourcing experience.
Find answers to common technical, logistics, and performance questions regarding rubber foam acoustic and thermal insulation.
Our complete range of industrial and building insulation products, manufactured to the highest quality and durability standards.
