Explore our foundational range of elastomer foam and mineral wool insulation systems designed for global compliance.
Modern building construction and industrial process designs require advanced thermal management solutions that reduce carbon outputs, control environmental hazards, and stabilize structural systems. As a leading manufacturer in China, Kingflex Insulation produces black closed-cell rubber foam insulation rolls and pipes that meet these demands. Utilizing an engineered compound of NBR (Nitrile-Butadiene Rubber) and PVC (Polyvinyl Chloride), our products are designed to deliver permanent thermal performance in challenging commercial environments.
By blending rubber polymers with fire-retardant elements, our technical department creates a matrix characterized by a high closed-cell concentration (>98%). This cell density acts as a dual-barrier against thermal transmission and water vapor absorption. In heavy industry applications, preventing moisture ingress is essential to avoiding Corrosion Under Insulation (CUI), a major cause of piping failure in commercial mechanical systems.
From central HVAC systems in commercial developments to specialized containment pipelines in heavy chemical plants.
Prevents surface condensation on commercial air ducts and chilled water piping. Keeps heat transfer low, protecting building envelopes from structural water damage and mold.
Designed for industrial process lines operating from -40°C to 105°C. Features chemical resistance to ozone, acids, oils, and environmental elements.
Engineered for high thermal resistance, maintaining thermal efficiency in extreme low-temperature pipelines and cold chain systems.
Annual Production Output
Global Export Footprint
Group Industrial Heritage
Closed-Cell Foaming Rate
Verified physical properties of NBR/PVC closed-cell elastomeric insulation materials.
| Property Parameter | Rubber Foam Insulation Sheet Roll | Rubber Foam Insulation Pipe/Tube | Testing & Compliance Standards |
|---|---|---|---|
| Base Compounds | NBR/PVC Elastomeric Polymer blend | NBR/PVC Elastomeric Polymer blend | ISO 9001, RoHS, REACH compliant |
| Nominal Density | 40 - 55 kg/m³ | 40 - 55 kg/m³ | ASTM D1622 / ISO 845 |
| Available Thickness | 6mm - 50mm | 9mm - 40mm (Inner Diameter: 6-114mm) | Customized OEM limits supported |
| Thermal Conductivity | ≤ 0.034 W/(m·k) at 0°C | ≤ 0.034 W/(m·k) at 0°C | ASTM C518 / EN 12667 |
| Operating Temperature | -40°C to 105°C (-40°F to 221°F) | -40°C to 105°C (-40°F to 221°F) | ASTM C411 Limits |
| Fire Safety Rating | Class 0 / Class 1 flame retardant | Flame retardant, self-extinguishing | BS 476 Part 6 & 7, UL94, ASTM E84 |
| Moisture Permeability | Resistance factor μ ≥ 10,000 | Resistance factor μ ≥ 10,000 | EN 12086 / ASTM E96 |
Kingflex Insulation Co., Ltd. belongs to the Jinwei Group, which holds a 40-year history in the thermal insulation industry. Established in 1979, Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River. Kingflex has developed from this group into an energy-saving enterprise focused on research, production, and global logistics.
Our production facilities are situated in Dacheng, China, a major region for green building materials. Operating with 5 large automatic assembly lines and producing over 600,000 cubic meters annually, we are a designated supplier for the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our workforce features specialized engineering talent. The Kingflex team includes 8 professional engineers in our R&D Department, 6 international sales agents, and 230 technicians in the production department. Our facility operates dynamic testing stations to inspect raw material quality, thermal values, and cell integrity prior to packaging.
This strict oversight ensures that every production run of black rubber foam insulation sheet rolls matches high quality standards. From raw NBR rubber compounding to final continuous vulcanization and foaming, each step is logged to ensure batch traceability.



Our products have passed BS 476, CE, REACH, RoHS, UL94, ASTM, and other international certifications, ensuring compliance with global standards.






Over the past 16 years, Kingflex thermal insulation products have been exported to more than 66 countries. We maintain collaborative relationships with project managers, procurement directors, and mechanical engineers worldwide. Our customer communication logs indicate high satisfaction ratings regarding product consistency, packaging, and on-time shipments.




Our products are used in commercial HVAC installations, municipal water grids, and petrochemical pipe insulation projects.








Understanding cost structures when ordering wholesale NBR/PVC rubber foam rolls from China.
For international buyers, the FOB China pricelist for rubber foam sheet rolls depends on several key variables:
Kingflex offers direct factory volume pricing for container loads, along with OEM sizing and protective packaging options designed for long-distance transport.












A closer look at the unique attributes of our primary NBR, PVC, and mineral wool product lines.
Flexible elastomeric tube with high resistance to water vapor diffusion, designed for copper pipe insulation.
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Specially formulated outer skin that protects underlying metal pipes against corrosion, moisture, and chemical exposure.
Technical Specs
Flexible construction that curves around pipe bends, reducing the need for cutting and gluing.
View Installation Guide
Industry-standard black elastomeric pipe insulation for commercial water heating and chilling systems.
Request Quote
Balanced NBR composition designed for soundproofing and vibration damping in HVAC equipment rooms.
Sound Data
Designed for high-capacity air conditioning system lines, preventing temperature loss and condensation.
HVAC Application Guide
Low-temperature insulation designed to handle thermal contraction in extreme cryogenic processes.
View Cryo Catalog
Engineered multi-layered systems designed for industrial LNG and gas processing facilities.
Request Engineering Drawing
Dual-purpose thermal control lining designed for pipelines cycling between hot and sub-zero processes.
Thermal Integrity Data
Maintains material flexibility at low temperatures to prevent stress cracking in industrial pipes.
View Test Reports
High-density structural board designed for high-temperature fire stops and partition walls.
Structural Details
Flexible mineral fiber blanket for boiler insulation, industrial ovens, and high-temp flues.
View Fire RatingsKingflex focuses on industrial energy conservation. We design and deliver integrated insulation systems that limit thermal losses in building systems, industrial piping, and cooling networks.
Equipped with 5 continuous extrusion and foaming lines, we handle large volume demands for infrastructure projects, maintaining product consistency across shipments. We work with engineering, procurement, and construction (EPC) companies to supply custom-slitted rolls, self-adhesive panels, and pre-formed pipe sections that align with project specifications.















Get in touch with our R&D and international sales teams to discuss custom thickness dimensions, technical parameter testing, and wholesale container pricing.
Contact Engineering & SalesExpert answers regarding elastomer performance, fire ratings, system specifications, and commercial purchasing.
Complete your design with our technical self-adhesive sheet rolls, high-thickness pipes, and cryogenic barrier systems.