Explore our engineering-grade closed-cell elastomeric tubes and sheets, designed for optimal thermal conductivity, anti-condensation, and high moisture vapor resistance.
Deep-dive research on molecular structure, thermal conduction parameters, and vapor barrier dynamics.
By leveraging an advanced chemical foaming process, we produce NBR/PVC polymer matrices with a closed-cell rate exceeding 98%. Each tiny microscopic cell encapsulates inert gas, significantly reducing convective and conductive heat transfer paths while maintaining physical elasticity.
Unlike open-cell materials like fiberglass or mineral wool, which act like sponges under high humidity, our closed-cell elastomeric foam features a high resistance factor to water vapor transmission (μ ≥ 7,000). This eliminates the need for separate vapor jackets, preventing moisture buildup and shielding pipes from Corrosion Under Insulation (CUI).
Our nitrile rubber foam blends incorporate specialized halogenated flame retardants and flame-suppressing mineral fillers. When exposed to flame, the material creates a localized carbonized char layer, preventing fire propagation. It complies with major global standards, including Class 0 (BS 476) and Class A (ASTM E84).
The table below illustrates the standard thermal, physical, and thermodynamic properties of Kingflex elastomeric materials under strict laboratory conditions.
| Physical Property | Testing Standard | Measured Specification Value |
|---|---|---|
| Thermal Conductivity (λ) | ASTM C518 / ISO 8301 | ≤ 0.034 W/(m·K) at 0 °C; ≤ 0.038 W/(m·K) at 40 °C |
| Water Vapor Permeability | ASTM E96 / BS EN 12086 | μ ≥ 7,000 (typical index ≥ 10,000 for customized lines) |
| Flammability Rating | BS 476 Part 6 & 7 / UL 94 | Class 0 / Class 1 / V-0 Rated |
| Service Temperature Range | ASTM C411 | -40 °C to +105 °C (-200 °C with specialized Cryogenic System sheets) |
| Density Profile | ASTM D1622 | 40 kg/m³ to 55 kg/m³ |
| Compression Resilience | ASTM D1056 | ≥ 80% recovery after deformation cycle |
Understanding user intent and operational environment requirements across commercial and heavy industrial fields.
Condensation control is vital for HVAC engineering. In hot, humid conditions, cold pipelines quickly attract condensed water, leading to mold growth, ruined ceiling tiles, and structural damage. Our closed-cell rubber sheet rolls block vapor migration, keeping indoor air clean while maintaining HVAC thermal efficiency in commercial buildings.
Cryogenic environments (like LNG pipelines and liquid nitrogen storage down to -200 °C) face severe thermal shocks. Standard foam can turn brittle and crack. Our Ultra-Low Temperature Cryogenic Rubber Foam insulation uses specialized elastic matrices that stay flexible at extreme cold temperatures, protecting critical piping and saving energy.
Data centers need high-performance chilled water systems running non-stop. Any condensation dripping onto electronics could cause catastrophic downtime. Our closed-cell rubber foam is fiber-free, dust-free, and highly reliable, making it the preferred choice for mission-critical cleanroom cooling loops.
A detailed comparison of our rubber foam against traditional mineral wool and rigid polyurethane insulation options.
Leveraging raw material integration, automated production, and global shipping logistics to deliver high-quality materials at scale.
Located in Dacheng, China—the capital of green-building materials—Kingflex is a leading manufacturing and trading team for premium thermal insulation. As an energy-saving, eco-friendly business, we focus on research, development, and sales. We offer comprehensive insulation systems through detailed consultations, R&D, product testing, installation guidance, and dedicated after-sales support.
Kingflex was established by Jinwei Group, which has a 40+ year history. Founded in 1979, Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River. This history provides us with extensive manufacturing expertise, raw material access, and refined production standards.
Our talented team works with a shared goal of delivering first-class service to clients worldwide. The Kingflex R&D department features 8 professional engineers, supported by 6 international sales representatives and 230 skilled production workers, ensuring reliable output and smooth order processing.
Ensuring complete product safety, certified performance, and environmental compliance across international construction markets.
We work to meet strict global certification criteria, ensuring peace of mind for engineering, procurement, and construction projects. Our products are fully certified under BS 476, CE, REACH, RoHS, UL 94, and ASTM standards, confirming their quality and safety.
Every step of production, from raw material inspection and batch mixing to chemical foaming, cutting, and packaging, is logged. This full process traceability lets us track quality back to the specific batch, guaranteeing consistency for industrial projects.
We are advancing our formulas toward halogen-free elastomeric materials (HF-Elastomer) to lower toxic gas emissions during fire events. We are also adopting clean blowing agents to achieve zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), meeting modern green building standards.
See our elastomeric sheet rolls, tubes, and cold-insulation systems in action on real-world sites.
Real procurement chats, batch approvals, and order tracking screenshots from partners globally, highlighting our dedication to reliable supply chains.
Standard dimensions, thicknesses, advantages, and applications for Kingflex elastomeric sheets and tubes.
Standard Dimensions:
Material: NBR/PVC Blend
Thickness: 6mm - 50mm
Density: 40 - 55 kg/m³
Temperature Range: -40 °C to +105 °C
Excellent for HVAC air ducts, building wall/roof insulation, large industrial tanks, cold chain storage facilities, and rail carriage body insulation.
Standard Dimensions:
Material: NBR/PVC Blend
Thickness: 9mm - 40mm
Inner Diameter (ID): 6mm - 114mm
Density: 40 - 55 kg/m³
Temperature Range: -40 °C to +105 °C
Ideal for hot/chilled water piping, AC refrigerant lines, domestic hot water loops, industrial process pipe protection, and solar thermal system outdoor piping.
A full range of certified solutions, including specialty rubber elastomeric tubes, sheets, and complementary rock wool panels.
Technical guidance and material recommendations from Kingflex's engineering team.
It is primarily used for commercial and industrial HVAC air ducts, refrigeration pipelines, building insulation, and chilled/hot water piping systems. Its closed-cell structure blocks moisture migration, making it highly effective at preventing pipe condensation and freezing while damping acoustic vibrations.
Yes, our rubber foam products are formulated with specialized flame retardants to meet BS 476 (Class 0), ASTM E84 (Class A), and UL 94 standards. They resist flame spread, release low smoke, and self-extinguish when the direct flame source is removed.
Rubber foam is highly flexible, features a built-in moisture vapor barrier (μ ≥ 7,000), and is ideal for anti-condensation applications, HVAC systems, and chilled lines without shedding fibers. Rock wool is a fibrous material with high temperature resistance, making it suitable for high-heat steam pipes, though it requires a separate protective jacket to prevent moisture absorption.
Yes, we offer OEM and ODM services. We can customize density profiles, roll lengths, sheet thicknesses (6mm up to 50mm), pipe inner diameters, and add specialized backings like self-adhesive layers or protective aluminum foil.
Our products have passed BS 476 Part 6 & 7, CE, REACH, RoHS, UL 94, and ASTM testing, ensuring compliance with building codes and environmental safety requirements worldwide.
Yes, we implement complete batch-level traceability. Every product run is marked and logged from raw polymer selection through the extrusion line, ensuring full accountability.
We produce sheet thicknesses ranging from 6mm up to 50mm. This wide range allows engineers to specify the exact thickness required to meet condensation and heat loss calculations.
Under typical operating conditions and with proper installation, our products have a service life of 10 to 15 years, maintaining stable thermal and physical performance.
Direct supply, competitive quotes, and custom configurations for global infrastructure projects.
Kingflex
