Explore our elite engineering-grade elastomeric insulation materials fabricated to international thermal, acoustic, and fire safety standards.
When selecting foam rubber insulation, engineering consultants and procurement managers prioritize long-term thermal reliability, cost efficiency, and localized regulatory compliance. China is home to the world's most robust industrial cluster for green building materials, situated primarily in Dacheng, China. This hub leverages concentrated raw polymer supply networks, advanced vulcanization facilities, and massive economies of scale to support modern construction, HVAC, and industrial processes.
Kingflex Insulation Co., Ltd. stands at the forefront of this industrial cluster. Established under the umbrella of the Jinwei Group (an industry pioneer founded in 1979 as the first thermal insulation manufacturer north of the Yangtze River), Kingflex has spent decades building integrated solutions spanning consultative engineering design, material synthesis, rigorous standard testing, and dedicated global export logistics.
Thermal insulation is only as good as its underlying material science. Below is a comprehensive look at the parameters that distinguish premium-grade NBR/PVC elastomeric rubber foam.
With a uniform micro-cellular structure yielding a closed-cell rate exceeding 98%, our rubber foam restricts the movement of air molecules, maintaining low, consistent thermal conductivity over decades. This cell density prevents water vapor entry, minimizing the risk of corrosion under insulation (CUI).
Designed to comply with high safety codes, the material exhibits self-extinguishing properties that prevent flame spread. Rigorously tested under BS 476 (Class 0 and Class 1), CE, UL94, and ASTM standards, this foam is ideal for commercial, civil, and industrial structures where fire performance is non-negotiable.
Standard variants operate seamlessly between -40℃ to 105℃, protecting piping systems from thermal loss and freezing. For specialized applications, our elastomeric cryogenic insulation systems protect ultra-low temperature and Liquefied Natural Gas (LNG) lines down to -200℃.
| Property | Test Standard | Kingflex Standard Spec Range | Engineering Value / Benefit |
|---|---|---|---|
| Material Base | - | NBR (Nitrile Butadiene Rubber) / PVC Blend | High elasticity, oil/chemical resistance, moisture barrier |
| Thermal Conductivity (λ) | ASTM C518 / ISO 8301 | ≤ 0.034 W/(m·K) at 0°C | Outstanding thermal barrier preventing energy loss |
| Water Vapor Permeability (μ) | BS EN 12086 / ASTM E96 | ≥ 10,000 (μ-factor) | Protects pipelines against condensation without vapor barriers |
| Fire Safety Rating | BS 476 Part 6 & 7 | Class 0 / Class 1 | Self-extinguishing, low smoke generation, flame retardant |
| Density | ASTM D1622 | 40 - 55 kg/m³ | Optimized flexibility, strength, and lightweight structure |
| Service Temperatures | EN 14706 | -40°C to +105°C (Cryo down to -200°C) | Suitable for HVAC, industrial steam, solar, and ULT piping |
Established by the Jinwei Group, Kingflex carries over 40 years of continuous manufacturing history. Founded in 1979, Jinwei Group established the very first thermal insulation material factory in Northern China. Drawing from decades of industrial wisdom, Kingflex has modernized its factory processes by building 5 fully automated extrusion, blowing, and vulcanization lines.
To align with modern green building standards, our dedicated R&D division, staffed by 8 expert chemists and mechanical engineers, continually refines our formulas. Through strict quality assurance protocols, Kingflex has attained certified supplier status for key institutions, including the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry in China.
Whether it's customized sizing (thicknesses from 6mm up to 50mm) or complex integrations such as class-leading aluminum foil jacketing, our team ensures every cubic meter shipped provides long-lasting insulation and acoustic dampening.
We manufacture two main product formats designed for simple field installation, durability, and compatibility with standard piping systems.
Standard Dimensions: Material: NBR/PVC | Thickness: 6mm - 50mm | Density: 40 - 55 kg/m³ | Temperature Limits: -40℃ to 105℃
Perfect for large ducts in central air conditioning systems, walls, roofing structures, chemical processing tanks, industrial machine rooms, and cold storage construction.
Standard Dimensions: Material: NBR/PVC | Thickness: 9mm - 40mm | Inner Diameter: 6mm - 114mm | Density: 40 - 55 kg/m³
Widely used to insulate central AC chilled/hot water pipes, condensate lines, building HVAC mains, industrial steam and processing networks, and cold chain logistics piping.
Procurement directors know that the nominal cost per cubic meter is only one part of total sourcing cost. Here is how Kingflex structures its pricing for maximum clarity and value.
Foam rubber pricing in China is driven by three main factors: polymer purity (NBR/PVC ratio), foaming density, and specialized additives (such as fire retardants or UV stabilizers). Low-quality alternatives often substitute cheaper fillers, which increases thermal conductivity and leads to premature breakdown under stress.
At Kingflex, we offer transparent, tier-based pricing structures depending on your project's volume and specifications:
1. Optimize Shipping Volumes: Foam insulation has high volume but low weight. We compression-pack our rolls and nested tubes to maximize container space and reduce ocean freight costs.
2. Define Certifications Early: Confirming your project's local fire and chemical safety requirements (such as BS 476, UL, RoHS, or REACH) helps us select the correct grade for your quotes.
3. Custom Cut to Lengths: Choosing pre-split pipes with self-adhesive strips speeds up onsite installation, lowering overall labor costs.
A visual tour of our state-of-the-art facilities, product range, international certificates, and verified project deliveries.
Modern Testing & R&D
Precision Extrusion Line
Curing & Vulcanization
BS 476 Quality Certificate
ISO Certification
CE Declaration
UL94 Fire Safety Test
Expert R&D Team
We prioritize transparency. Below are verified feedback logs and order screenshots from global contractors working with Kingflex.
Beyond elastomeric rubber, we manufacture high-density rock wool for high-temperature and fireproof applications, ensuring a single source for all project insulation needs.
Engineered for high-temperature furnace walls and commercial structures requiring structural fire safety barriers.
Flexible high-density stone wool rolls faced with wire mesh or foil for heavy industrial ducting.
Multi-layered composite systems designed for LNG storage terminals and transport pipelines.
Pre-cut, high-elasticity protective sleeves designed to shield processing lines from condensation.
Technical clarifications on elastomeric foam rubber selection, testing, standards, and global purchasing procedures.
It is primarily used to insulate central HVAC ducts, commercial VRF piping, plumbing networks, industrial process lines, and cold storage chambers. It excels in cold insulation systems, where its high moisture resistance prevents water vapor transmission and pipeline sweating.
Yes. Our insulation rolls and tubes are formulated with fire retardants to meet BS 476 Part 6 & 7 (Class 0 / Class 1), UL94 (V-0 rating), and ASTM E84 specifications. The material self-extinguishes upon fire contact and releases minimal smoke.
Elastomeric rubber foam is a flexible, closed-cell material that prevents moisture penetration. It is ideal for HVAC, cold pipelines, and mid-temperature systems (-40°C to 105°C). Rock wool is an open-cell mineral fiber that withstands extreme heat (up to 1000°C), making it suitable for industrial high-pressure steam networks and structural firewalls.
Yes, we provide full OEM and customization services. We can supply custom thicknesses (6mm to 50mm), pre-slit tubes, self-adhesive backing, and protective finishes like aluminum foil or glass-cloth composite cladding.
Kingflex products comply with ISO 9001:2015, CE, REACH, RoHS, BS 476, UL94, and ASTM testing standards. This makes our materials fully compliant with construction codes in Europe, the Middle East, the Americas, and Southeast Asia.
Yes. Every production run is marked with batch codes. Our quality control lab archives raw material logs and sample testing records for up to 5 years, providing full traceability for engineering handovers.
Our automated lines can produce continuous sheet rolls in thicknesses ranging from 6mm to 50mm, allowing engineers to match insulation depth precisely to project condensation calculations.
When installed correctly according to manufacturer guidelines, Kingflex rubber foam insulation typically lasts 10 to 15 years in standard indoor HVAC environments, maintaining stable thermal and physical performance.
Kingflex elastomeric systems are used in diverse locations worldwide, including commercial offices, industrial HVAC complexes, cleanrooms, and cryogenic facilities.
Select from our complete range of elastomeric, pipe, and board insulation products to secure direct manufacturer pricing.
Kingflex
