Kingflex
Kingflex
Explore our premium closed-cell NBR/PVC elastomeric rubber foam sheets, rolls, and tube products engineered for demanding HVAC, cryogenic, and industrial piping applications.
Kingflex Insulation Co., Ltd. stands as a premier manufacturing and trading powerhouse specializing in high-performance thermal insulation products. Headquartered in Dacheng, the recognized green-building materials capital of China, our operations integrate state-of-the-art research, advanced extrusion and curing technology, and international logistics. As an energy-saving, environmentally conscious enterprise, Kingflex places environmental preservation and system energy efficiency at the very core of its production values.
Founded by the Jinwei Group, an organization boasting over 40 years of market presence established back in 1979, Kingflex was built on a foundation of engineering excellence. The Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River. Today, Kingflex drives the HVAC, acoustic, and process pipeline insulation markets globally through integrated consultancy, collaborative R&D, precision manufacturing, and professional post-sale guidance.
Led by 8 senior chemical and thermal dynamics engineers specialized in polymer cell formulation.
Active export networks stretching across 66+ countries, serving major contractors and HVAC distributors.
Technical insights into thermal energy loss, condensation mitigation, and micro-cellular material configuration.
Black color rubber foam is formulated using a matrix of synthetic Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC). This formulation produces an ultra-high density of microscopic, closed gas cells (exceeding 98% cell closure). Each cell encapsulates dry, stable gas, creating an impenetrable barrier against water vapor transmission, preventing thermal degradation and corrosion under insulation (CUI).
With an initial thermal conductivity ($\lambda$) of $\le 0.034 \text{ W/(m}\cdot\text{K)}$ at $0^\circ\text{C}$, Kingflex elastomeric materials minimize energy transfer. The fully closed structural cells prevent heat transfer by convection, while the high carbon black density blocks radiative heat transfer, making it ideal for maintaining critical process temperatures in HVAC air ducts and industrial cold-service lines.
Engineered to comply with stringent fire protection guidelines, our black rubber foam incorporates advanced halogen-free and antimony-free flame retardants. Under thermal attack, it generates a carbonizing protective layer that suppresses oxygen contact, allowing it to meet international standards such as BS 476 Class 0, CE, REACH, RoHS, UL94, and ASTM fire certifications.
Large-scale construction, petrochemical, and defense engineering initiatives place strict performance demands on supply chains. Modern procurement offices evaluate more than just initial unit prices; they demand long-term thermal stability, structural resilience, and clear raw-material traceability.
Key concerns driving global supply chain managers include:
Kingflex addresses these procurement priorities by offering custom configurations—such as self-adhesive backings, aluminum foil facings, and customized thickness ranges (6mm to 50mm)—ensuring compatibility with demanding mechanical and physical requirements.
Engineered for high-volume supply networks, featuring advanced automation and strict quality control.
Global logistics demand high manufacturing capacity and reliable supply lines. Kingflex operates 5 advanced automatic assembly lines, generating an annual manufacturing output in excess of 600,000 cubic meters. This scale establishes Kingflex as a primary designated supplier for China's key ministries, including the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry.
Our Factory 4.0 infrastructure utilizes computerized dosing systems to maintain chemical consistency in our rubber blends, along with integrated sensor arrays to control curing temperatures. This level of automation ensures consistency across batches, preventing uneven cell expansion and stabilizing mechanical properties. Our workforce of 230 technicians and 8 R&D engineers ensures that each production run aligns with international standards.
Years of Corporate Heritage
Countries Exported Globally
M³ Annual Production Capacity
Closed-Cell Expansion Rate
Comprehensive standard dimensions, structural compositions, and application limits for Kingflex elastomeric insulation sheet rolls and pipes.
Designed to insulate wide flat profiles, massive industrial tanks, air ventilation ducts, and large-diameter pipelines.
Precision-extruded circular insulation tubes designed for seamless integration on piping networks and central HVAC setups.
Where Kingflex thermal systems are deployed to protect infrastructure, conserve energy, and manage condensation.
Used for insulating chilled water pipes, air duct trunks, and refrigerant systems. The closed-cell material prevents air-moisture condensation, maintaining energy efficiency in commercial, residential, and corporate facilities.
Protects process pipelines and storage tanks in chemical plants, petrochemical refineries, and textile mills. It helps maintain product temperature profiles and prevents structural corrosion under insulation (CUI).
Specifically engineered to isolate low-temperature pipelines and cold chambers. These formulations remain flexible at low temperatures without cracking, preventing frost formation and thermal ingress.
Applied to walls, roofs, and basements in green-building structures. It provides both thermal resistance and noise reduction, helping properties qualify for LEED or BREEAM environmental ratings.
Used in vehicle floors, ventilation ducts, and train carriages. Its lightweight composition, flame resistance, and acoustic dampening support passenger comfort and safety.
Applied to solar collector manifolds and outdoor hot-water distribution lines. It resists UV weathering (when paired with specialized coatings) and high operating temperatures up to 105°C.
A look at our international manufacturing sites, laboratory procedures, and quality documentation.
Essential guidance for HVAC contractors, mechanical engineers, and procurement managers sourcing Kingflex insulation systems.
Elastomeric rubber foam insulation is primarily used to insulate HVAC ductwork, air conditioning pipes, building envelopes, industrial process lines, and cold storage systems. Its closed-cell structure makes it effective for preventing condensation on chilled-water lines and reducing energy loss in both hot and cold thermal systems.
Yes. Kingflex rubber foam insulation products are formulated with flame-retardant additives to meet international building safety standards. They are certified class-compliant under BS 476 Part 6 & Part 7 (Class 0), and meet flame-spread requirements under UL94 HF-1 and ASTM E84 testing, ensuring self-extinguishing performance and low smoke emissions.
Rubber foam is a flexible, closed-cell material that offers high resistance to moisture and water vapor, making it suitable for HVAC, chilled-water piping, and sub-zero processes. Rock wool is an open-cell, mineral-based fibrous insulation designed for high-temperature applications (exceeding 120°C to 1000°C) and structural fire barriers, but it requires an external vapor barrier to prevent moisture absorption.
Yes. We provide OEM and ODM services. We can customize density ranges (40-55 kg/m³), dimensions, thickness options (from 6mm to 50mm), and add factory-applied self-adhesive backings, reinforced aluminum foils, or weathering jackets based on your project's specifications.
Kingflex products hold international certifications, including BS 476 (Class 0 and Class 1), CE mark compliance, REACH, RoHS, UL94, and ASTM credentials. These third-party validations ensure our materials comply with regulatory codes for safety, environmental impact, and performance across global markets.
Yes, we maintain full quality control traceability. Every production run is documented, linking raw materials, automated processing parameters, and final quality checks to a unique batch number, ensuring consistency and clear accountability.
Our standard manufacturing thickness range for elastomeric rubber foam insulation rolls is from 6mm to 50mm. Specialized thicknesses within this range can be custom-manufactured to meet specific thermal resistance (R-value) targets.
Under typical operating conditions and with proper installation, Kingflex NBR/PVC closed-cell insulation has a service life of 10 to 15 years. For outdoor installations, applying a UV-resistant coating or protective metal cladding helps maintain its service life by preventing environmental weathering.
Explore our wider range of specialized elastomeric foam tubes, cryogenic coverings, and high-density acoustic insulation boards.
