Kingflex
Direct from China's Premier Elastomeric Foam Manufacturing Facility
High-performance sound dampening and acoustic isolation sheets, ideal for wall lining, mechanical rooms, and HVAC ducts.
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Durable elastomeric pipe insulation engineered with premium NBR and PVC compounds for HVAC condensation prevention.
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Flexible, closed-cell rubber foam insulation sheets providing low thermal conductivity and stable R-value properties.
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Closed-cell elastomeric foam roll reinforced with standard self-adhesive backing for rapid, secure on-site installation.
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Standard 19mm thickness roll designed for heavy-duty commercial plumbing and large-diameter HVAC ducting systems.
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Precision-manufactured elastomer tubing optimizing heat resistance and preventing surface condensation on pipework.
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Closed-cell elastomeric nitrile foam tubes designed to meet rigorous HVAC, refrigeration, and plumbing demands globally.
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High-density, flame-retardant NBR foam rolls engineered for thermal management, condensation prevention, and mechanical protection.
Download CatalogIn the selection of thermal insulation systems, evaluating material costs on a "Per Square Foot" (Per Sq Ft) basis is the primary financial and engineering metric for global construction projects, mechanical systems, and petrochemical installations. When sourcing from China, the world's leading hub for advanced green-building materials, understanding the direct correlation between material density, cell structure, thermal conductivity (λ-value), and pricing dynamics is critical for maximizing both cost efficiency and long-term asset lifetime.
Modern elastomeric foam systems, composed primarily of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), represent a significant advancement in material science. Unlike traditional open-cell materials like fiberglass or mineral wool, NBR/PVC elastomeric foam features a closed-cell rate exceeding 98%. This dense cellular configuration creates a highly resistant barrier against moisture vapor transmission, which is the primary cause of thermal performance degradation. When water penetrates insulation, its high thermal conductivity (approximately 0.6 W/(m·K)) drastically reduces the system's thermal resistance, leading to energy loss, structural decay, and the high-risk phenomenon of Corrosion Under Insulation (CUI).
By keeping the vapor barrier integrated throughout the entire thickness of the material, Kingflex elastomeric foam maintains stable thermal conductivity (typically ≤ 0.034 W/(m·K) at 0°C) and a high water vapor diffusion resistance factor (μ ≥ 10,000). Evaluating these parameters on a Per Sq Ft metric allows MEP engineers and quantity surveyors to calculate a more accurate Total Cost of Ownership (TCO) rather than just initial purchase cost.
Procuring thermal insulation from China requires a granular understanding of how pricing is structured. A standard "Pricelist" is rarely fixed; instead, it scales dynamically based on performance variables, compliance requirements, and dimensional specifications. Below is an analytical overview of the factors that dictate the Per Sq Ft cost of NBR/PVC and rock wool insulation materials:
| Material Type | Thickness Range | Density (kg/m³) | Fire Rating Compliance | Est. Relative Price Index (Per Sq Ft) |
|---|---|---|---|---|
| Standard NBR/PVC Foam Roll | 6mm - 13mm | 40 - 45 | GB8624 Class B2 / UL94 HF-1 | Baseline ($) |
| High-Density NBR/PVC Sheet | 19mm - 32mm | 45 - 50 | BS 476 Class 1 / ASTM E84 | 1.3x - 1.5x Baseline |
| Class 0 Cryogenic Elastomer | 25mm - 50mm | 50 - 55 | BS 476 Class 0 / CE EN 13501-1 | 2.0x - 2.5x Baseline |
| Alu-Clad Reinforced Foam Sheet | 9mm - 25mm | 45 - 50 | BS 476 Class 0 / UV Resistant | 1.8x - 2.2x Baseline |
| Industrial Rock Wool Board | 50mm - 100mm | 80 - 120 | Class A1 Non-combustible | Varies by density ($ - $$) |
A Pioneer in Thermal & Acoustic Engineering Since 1979
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Located in Dacheng, China—widely recognized as the capital of green-building materials—Kingflex has established itself as an energy-saving, environmentally friendly enterprise concentrating on research and development, production, and global sales.
In operation, Kingflex takes energy saving and consumption reduction as its core concept. We provide integrated solutions regarding thermal insulation, cold insulation, and noise reduction through consultancies, advanced R&D production, comprehensive installation guidance, and dedicated post-sale services. This complete lifecycle support enables us to lead the development of the global building materials market.
Kingflex was established by the Jinwei Group, which boasts a rich history of more than 40 years. Founded in 1979, the Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River. Over the decades, this foundational expertise has allowed Kingflex to scale production, refine rubber foaming technologies, and achieve significant market share in both domestic and international projects.
Our employees are amazing in their own right, but together they are what makes Kingflex a highly rewarding place to work. The Kingflex team is a tight-knit, talented group with a shared vision of giving consistently first-class service to our clients. Our technical capability is anchored by eight professional engineers in our R&D Department, supported by 6 international sales experts and 230 highly skilled workers in the production department.
At our specialized Dacheng testing center, we run rigorous daily assessments including thermal conductivity tests, oxygen index tests, smoke density evaluations, and aging simulations to ensure every batch of rubber foam meets global building codes.
Verified Quality Standards for Smooth Custom Clearance and Local Compliance
Thermal insulation requirements vary wildly across different geographical climates and vertical markets. A "one-size-fits-all" insulation model often leads to rapid mechanical degradation or catastrophic failure. Kingflex engineers materials for target-specific localized application environments:
In regions characterized by persistent high relative humidity and ambient temperatures exceeding 40°C, the temperature differential (ΔT) between chilled water pipelines (typically 4°C to 7°C) and the external environment is severe. This induces a constant vapor pressure drive toward the pipe surface. Traditional fiberglass quickly gets saturated, rendering it useless. Kingflex high-density closed-cell elastomeric foam rolls with an NBR base prevent vapor ingress. Since the material contains billions of micro-cells that are completely sealed, there is no need for external vapor barrier coatings, making it ideal for tropical HVAC ducting and water chillers.
In sub-zero climates, standard outdoor insulation materials become brittle and crack. Kingflex flexible elastomeric NBR foam rolls maintain their elasticity down to -40°C. For industrial process pipes carrying hot liquids, the thermal insulation provides a double benefit: it resists thermal loss while remaining ductile, preventing fracturing caused by structural vibrations and thermal expansion cycles.
Acoustic and fire safety are the top priorities in crowded civil spaces. Kingflex soundproof insulation sheet range features open-cell or specialized semi-open-cell structures to absorb structural airborne noise from ventilation ducts. Concurrently, their flame-retardant formulation ensures that in the event of fire, the insulation self-extinguishes, produces minimal smoke, and prevents flame propagation, complying directly with local building standards like BS 476 Part 6 & 7.
Engineered to Excel Under Extreme Operational Stresses
Standard Dimension: Material: NBR/PVC | Thickness: 6mm - 50mm | Density: 40 - 55 kg/m³ | Service Temperature Range: -40℃ to 105℃
Standard Dimension: Material: NBR/PVC | Thickness: 9mm - 40mm | ID: 6mm - 114mm | Density: 40 - 55 kg/m³ | Service Temperature Range: -40℃ to 105℃
Kingflex Insulation Systems in Global Operation
Specific Formulations Engineered for Specialized Industrial Sectors
Standard density NBR/PVC elastomer tube, engineered for building plumbing and light industrial refrigeration lines.
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Chemical and corrosion resistant formulation designed for petrochemical process piping and offshore projects.
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Highly flexible tubing with 85% compression recovery, perfect for complex configurations and tight pipe bends.
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The classic NBR/PVC closed-cell foam tube for everyday residential and commercial air conditioning lines.
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Ultra-light closed-cell structural tube providing baseline R-value performance at highly competitive price points.
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Heavy-duty thermal isolation tubing specifically engineered for commercial and industrial VRF systems.
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Multi-layered cryogenic insulation systems designed for liquid gas lines and low-temperature process plants.
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Engineered for extreme sub-zero operation, retaining flexibility and thermal resistance down to -200°C.
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High-performance elastomeric foam sheets customized for LNG shipping vessels and storage terminals.
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High-density thermal protection designed for cold-end processes in chemical refineries and scientific facilities.
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High-density mineral fiber boards offering fire resistance (Class A1) and structural sound mitigation.
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Flexible, high-temperature resistant rock wool blankets lined with wire mesh for large tanks and power generation ducts.
Inquire Spec SheetAs international energy conservation codes (like ASHRAE 90.1 and IECC) become more stringent, the thermal insulation industry is undergoing a structural paradigm shift. The engineering roadmap at Kingflex focuses on three main developments:
Traditional fire retardants rely heavily on halogenated compounds which release toxic acid gases during thermal decomposition. Kingflex is investing in next-generation phosphorus-nitrogen and mineral-based (aluminum trihydroxide/magnesium hydroxide) fire-retarding additives. This formulation ensures compliance with European EN 13501-1 standards while maintaining the mechanical flexibility and low thermal conductivity of the NBR elastomer base.
Environmental sustainability is critical to our corporate roadmap. Kingflex has completely phased out HCFC-based blowing agents, replacing them with CO2 and hydrocarbon-based foaming technologies. This shift results in products with a global warming potential (GWP) of nearly zero and ozone depletion potential (ODP) of zero, ensuring compatibility with international green-building rating systems like LEED, BREEAM, and Estidama.
By implementing Industry 4.0 automation systems, our factory synchronizes chemical dosing, continuous mixing, foaming, extrusion, and curing on our 5 assembly lines. This automated process minimizes physical variation, maintaining density tolerances within ±2% and maximizing the uniformity of the closed-cell structure. The resulting thermal insulation provides consistent, repeatable R-values across large-scale procurement projects.
Sourcing insulation materials from Dacheng, China, grants global buyers access to a highly integrated industrial cluster. This localized cluster provides unmatched supply chain resilience, allowing us to manage large production volumes with competitive delivery timelines:
Real-Time Tracking and Transparent Quality Assurance for Global Project Directors
In-Depth Answers to the Most Common Procurement and Technical Design Questions
Elastomeric rubber foam is a highly versatile insulation material. It is primarily utilized in HVAC duct systems, commercial chilled water lines, industrial piping systems, mechanical equipment rooms, sound-dampening partitions, and cryogenic operations (such as LNG terminals). Its closed-cell structure prevents vapor transmission, making it optimal for systems operating below ambient temperatures.
Yes. Our rubber foam insulation features advanced fire retardant formulations that meet global safety standards. These include BS 476 Part 7 (Class 1) and Part 6 (Class 0), CE (EN 13501-1), UL94 (V-0 rating), and ASTM standards, which specify low flame spread index (FSI ≤ 25) and smoke developed index (SDI ≤ 50).
Rubber foam is a flexible, closed-cell, moisture-proof material with high water vapor resistance, making it ideal for refrigeration, HVAC, and condensation control. Rock wool is a high-temperature resistant, non-combustible mineral fiber, optimal for extreme industrial heat systems, furnace walls, and high-performance fire-stop partitions.
Yes, Kingflex offers comprehensive OEM services. We can adjust the thickness (from 6mm up to 50mm), density (from 40 to 55 kg/m³), formulation (such as halogen-free or extra flexible compounds), color, dimensions, and facings (including aluminum foil or self-adhesive linings) to match specific regional building codes and design demands.
Kingflex products have successfully passed rigorous third-party testing, obtaining certifications for BS 476, CE, REACH, RoHS, UL94, and ASTM. This verification ensures our thermal insulation materials comply with strict international trade standards and regional environmental laws.
Yes, we maintain a complete manufacturing execution system (MES). Every production batch is coded and traceable, tracking the raw material batch, chemical formulation, processing shift, quality inspection, and warehousing logs, ensuring full transparency.
We manufacture rubber foam insulation rolls in thicknesses ranging from 6mm to 50mm. This range allows designers to select the optimal thickness for their thermal performance and R-value requirements.
Under normal operating conditions and with proper professional installation, our rubber foam products maintain their structural integrity and thermal properties for 10 to 15 years, reducing maintenance costs over the system's lifetime.
Premium Thermal Control Solutions for Low Temperature Environments
High-density cryogenic elastomer engineered for ultra-low temperature applications, maintaining elasticity down to -200°C.
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Heavy-duty rubber foam tubing for large-diameter steam and process water pipework in industrial plants.
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Specialized open-cell structure optimized for airborne sound absorption and thermal isolation in mechanical units.
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High-density NBR/PVC pipeline sleeve designed for cryogenic fluid lines and industrial chemical processing.
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High-performance elastomeric thermal wrap designed for process systems carrying liquid nitrogen or oxygen.
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Thermal insulation sheets engineered for large-scale cryogenic containment systems and storage tanks.
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Industrial-grade rubber foam insulation sheets, optimized to maintain low thermal conductivity under sub-zero pressure.
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Premium NBR/PVC thermal sheets designed for direct wholesale. Excellent density control and long-term durability.
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