Engineered closed-cell elastomeric rubber foam sheets and rolls for optimal condensation control and high thermal efficiency.
In modern industrial and commercial construction, the selection of thermal insulation is a critical factor impacting operational efficiency, system lifespan, and safety compliance. Elastomeric rubber foam sheets and rolls fabricated from high-grade Nitrile Butadiene Rubber (NBR) combined with Polyvinyl Chloride (PVC) have emerged as the industry standard. Their unique closed-cell molecular structure provides an integrated solution to heat transfer, vapor transmission, and acoustic pollution.
Kingflex Insulation Co., Ltd. stands at the forefront of this manufacturing landscape, delivering high-density elastomeric materials designed to combat severe environmental stresses. With applications ranging from commercial HVAC duct linings to extreme low-temperature cryogenic pipelines, Kingflex technology ensures long-term thermal sustainability and energy conservation.
A granular look at the structural, thermal, and mechanical parameters of our standard elastomeric insulation sheet rolls.
| Performance Parameter | Testing Standard Reference | Kingflex Standard Value | Strategic Engineering Value |
|---|---|---|---|
| Material Base | Nitrile Rubber (NBR) / PVC Blend | Premium Grade NBR/PVC | Excellent flexibility and durability |
| Thickness Range | EN 823 / ASTM C534 | 6mm to 50mm | Configurable for varying thermal deltas |
| Density Range | ASTM D1622 | 40 - 55 kg/m³ | Optimized cell structure stability |
| Thermal Conductivity (λ) | ASTM C518 / ISO 8301 | ≤ 0.034 W/(m·k) at 0°C | Superior reduction of conductive heat transfer |
| Service Temperature Limit | ASTM C411 | -40°C to +105°C (Cryogenic down to -200°C) | Highly versatile across extreme process pipes |
| Moisture Resistance Factor (μ) | BS EN 12086 | ≥ 10,000 (Closed-cell rate > 98%) | Mitigates CUI (Corrosion Under Insulation) |
| Fire Safety Classification | BS 476 Part 7 / UL 94 | Class 1 / V-0 Rated | Flame retardant with self-extinguishing properties |
| Resilience Rating | ASTM D3574 | Compression recovery > 80% | Retains structure under physical compression |
How Kingflex rubber foam insulation is engineered to address the specific performance requirements of global industries.
In global HVAC networks, minimizing thermal gain/loss is vital for energy certification. Kingflex NBR/PVC sheets offer a smooth, dust-free surface suitable for internal lining, dampening mechanical vibrations and eliminating condensation risks in humid climates.
For LNG facilities, chemicals, and industrial refrigeration operating down to -200°C, the Kingflex Cryogenic and ultra-low temperature series provides thermal performance and structural flexibility, preventing micro-fractures associated with thermal contraction.
In refinery operations and process manufacturing, our insulation acts as a barrier against external corrosive elements. The high chemical resistance of NBR/PVC compounds protects raw piping from ambient salt spray, acid vapors, and mechanical wear.
Engineered low-density rubber foam effectively acts as a decoupling layer for machinery casings and compressor rooms. The cell geometry absorbs vibration, minimizing structural sound propagation across high-occupancy projects.
Kingflex operates modern automated manufacturing complexes based in Dacheng, China, a recognized manufacturing hub for green building solutions. Under the guidance of our parent organization, Jinwei Group (pioneering insulation engineering since 1979), Kingflex maintains five active automatic assembly lines. This production infrastructure yields an annual output exceeding 600,000 cubic meters, allowing us to supply large-scale global projects with minimal lead times.
Our dedicated Research and Development division features 8 specialized chemical and material engineers. We perform in-house tests on density variation, thermal stability, flame propagation, and moisture absorption. We also coordinate with testing entities such as SGS, TÜV Rheinland, and Intertek to maintain international certifications.
Our commitment to quality is backed by advanced analytical testing tools and quality control protocols.
Ensures every batch of NBR/PVC foam falls within specified thermal resistance ranges.
Validates BS 476 Class 1 rating and UL 94 vertical burn compliance standards.
Monitors structural elasticity, compression recovery, and tensile strength characteristics.
Kingflex insulation sheets meet standard building and industrial safety regulations worldwide.
Certified factory management and quality control systems.
Certified for commercial supply within the European Economic Area.
Lead-free, halogen-restricted, non-hazardous compound formulations.
Evaluated for thermal resistance, water vapor permeability, and density.
Verification of Kingflex service quality, logistics execution, and technical coordination.
Global architectural and industrial projects insulated with Kingflex elastomeric materials.
Designed for large surface areas such as square ducts, industrial tanks, and large-diameter piping systems. The sheet structure provides clean, seamless wrapping options to eliminate potential thermal bridges.
Material Base: Nitrile Rubber (NBR) & Polyvinyl Chloride (PVC)
Thickness Envelope: 6mm - 50mm
Nominal Density Range: 40 - 55 kg/m³
Operational Limits: -40℃ to +105℃
• Balanced cell expansion for an even cellular distribution.
• Strong vapor barrier protection (moisture absorption under 2%).
• Flexible structure for easy cutting and installation.
• Self-extinguishing fire performance under heat load.
Specifically extruded for tubular conduits and piping lines. The pre-slit or seamless configurations accommodate standard pipe outer diameters, reducing assembly times in residential plumbing, HVAC loop piping, and industrial networks.
Material Base: NBR/PVC Elastomeric Foam
Wall Thickness Range: 9mm - 40mm
Internal Diameter (ID) Range: 6mm - 114mm
Nominal Density: 40 - 55 kg/m³
• Uniform inner wall diameter ensures a snug fit.
• Formulated NBR/PVC blend provides long-term resistance to aging.
• Limits sound propagation in drain and waste lines.
• Protects metal pipes from galvanic and exterior oxidation.
Answers to common technical, design, and procurement questions regarding NBR/PVC elastomeric rubber foam insulation.
Elastomeric rubber foam insulation is primarily used for insulating HVAC ductwork, chilled water pipes, refrigeration lines, hot and cold water plumbing, building envelopes, and acoustic linings. Its closed-cell structure makes it effective for preventing condensation on cold processes and protecting industrial pipelines from moisture ingress and corrosion under insulation (CUI).
Yes. Kingflex rubber foam products are formulated with flame retardants to achieve fire safety ratings. Our materials pass the BS 476 Part 7 Class 1 surface spread of flame test, meet UL 94 V-0 parameters, and conform to regional building safety regulations.
Rubber foam is a flexible, closed-cell material that prevents moisture vapor transmission, making it ideal for cold processes and HVAC applications where moisture control is required. Rock wool is an open-fiber mineral wool suitable for high-temperature industrial processes (over 200°C) and structural firewalls due to its high melting point, though it requires an external vapor barrier to prevent water absorption.
Yes, we provide OEM and custom services. We can adjust the thickness (6mm to 50mm), add custom self-adhesive backings, apply aluminum foil protective facings, modify color profiles, and produce custom pipe diameters to meet specific engineering criteria.
Our materials conform to multiple international quality frameworks, including BS 476, CE, REACH, RoHS, UL 94, and ASTM. This ensures compliance with fire safety, toxicity, chemical trace limits, and thermal transmission requirements for major global markets.
Yes. We implement an end-to-end batch tracking system. Every production run has an associated code matching raw materials, machine settings, quality control tests, and packaging runs, allowing for full supply-chain transparency.
We manufacture sheet rolls in nominal thicknesses from 6mm to 50mm. Thicker specifications are commonly used for high thermal gradients, while thinner sheets are suited for tight spaces in small air handling housings.
When installed according to engineering guidelines and kept free from mechanical abuse or continuous UV exposure without proper coatings, Kingflex elastomeric insulation has an operational lifespan of 10 to 15 years.
Specialized elastomeric configurations, including aluminum foil coverings, low density variants, and custom colors.
Complete listing of manufactured materials and thermal solutions by Kingflex Insulation Co., Ltd.
Analyzing the shift from traditional insulation to advanced NBR/PVC elastomeric matrix structures.
CUI remains a costly failure mode in process piping. Traditional fibrous insulations absorb airborne moisture, trapping it against metal surfaces. NBR/PVC elastomeric rubber foam presents a closed-cell wall configuration that acts as a continuous water vapor retarder, protecting underlying steel pipework from corrosion.
The cell structure of Kingflex rubber foam contains gas pockets that limit convective and conductive heat transfer. Because the cells are closed, the insulation is resistant to moisture absorption, ensuring the thermal conductivity (λ ≤ 0.034 W/mK) remains stable over the product's lifespan.
Modern buildings require strict compliance with fire safety codes. Kingflex products are formulated with flame retardants that form a carbonaceous char layer when exposed to fire. This performance meets BS 476 and UL 94 regulations to prevent fire spread in commercial spaces.
Our facility operates under an integrated supply chain model, sourcing raw materials locally to manage pricing volatility and ensure reliable supply. Automated formulation processes control the ratio of NBR, PVC, plasticizers, and blowing agents to produce consistent density and cellular structure.
For international shipments, Kingflex provides protective packaging options, including heavy-duty polyethylene wraps, fiber cartons, and custom pallets. This ensures the material remains uncompressed and undamaged during sea transit, ready for direct installation on the job site.
Contact our technical sales team for comprehensive specifications, material certifications, and wholesale pricing tables. We can customize solutions to meet the thermal and compliance needs of your project.
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