Explore our leading closed-cell elastomeric rubber foam sheets, rolls, and pipes, precision-manufactured for optimal HVAC system, building cladding, and industrial process protection.
Established by the renowned Jinwei Group (Kingway Group) in 1979, Kingflex has built a historical legacy as the pioneering manufacturer of thermal insulation materials north of the Yangtze River. Located in Dacheng, China—the recognized capital of green building materials—our enterprise occupies a prime geographic location for raw material sourcing, chemical engineering, and logistics optimization.
Our operation integrates R&D, mass production, and export logistics, working strictly under the philosophy of active energy conservation and consumption reduction. Beyond physical supply, we act as a complete system-solution partner, offering technical consulting, performance validation, and installation support across the life cycle of commercial HVAC, industrial piping, and cryogenic systems.
"We supply integrated solutions encompassing thermal insulation, acoustic reduction, and cold-retention systems, meeting strict energy compliance regulations across global borders."
Annual Production Capacity
Automated High-Speed Assembly
Global Export Network
Heritage of Technical Expertise
Kingflex elastomeric closed-cell insulation materials are chemically cross-linked to achieve high-performance thermal insulation and superior resistance to water vapor transmission.
Our core product formulation is based on a high-grade Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC) blend. By applying advanced micro-cell gas-foaming technologies, we produce a structure with a closed-cell rate exceeding 98%. This creates an impermeable barrier against both heat transfer and moisture migration, avoiding the structural degradation common in open-cell mineral wools.
| Technical Parameter | Value / Metric | Test Standards Compliance |
|---|---|---|
| Material Base | Premium Nitrile NBR/PVC Blend | ISO 9001, ASTM |
| Service Temp Range | -40℃ to +105℃ (Up to -196℃ for Cryogenic) | ASTM C534 |
| Thermal Conductivity ($\lambda$) | ≤ 0.034 W/m·K (at 0℃) | ASTM C177 / ISO 8302 |
| Closed Cell Rate | ≥ 98% | GB/T 10799 |
| Moisture Permeability | μ Factor ≥ 10,000 | EN 12086 / ASTM E96 |
| Fire Performance Rating | Class 0 / Class 1 / V-0 Rating | BS 476 Part 6 & 7, UL 94 |
Continuous monitoring of chemical compounding and mechanical properties ensures that every batch meets stringent international construction standards.
Our specialized lab features 8 dedicated material scientists who optimize the cell structure and flame-retardant properties of our NBR foam systems.
Automated density gauges and mechanical fatigue testers verify that density is kept within the 40–55 kg/m³ range for optimal thermal performance.
We perform environmental tracking of materials, ensuring full traceability for BS 476, CE, REACH, RoHS, UL94, and ASTM certification compliance.
Combining local manufacturing clusters with advanced automated supply chain mechanics gives our partners a competitive cost-to-performance ratio.
Being located in Dacheng—the industrial hub of Chinese insulation production—gives us direct access to high-grade polymer resins, foaming agents, and fire retardants. This keeps raw material costs low and stabilizes our pricing structure against global market fluctuations.
Operating 5 large-scale automated lines allows us to process high-volume OEM orders quickly. We produce up to 600,000 cubic meters annually, keeping lead times short even during high seasonal demand.
We design our products to meet strict global fire ratings. Meeting certifications like BS 476 (Class 0 and 1) and UL 94 V-0 enables smooth project approval in highly regulated markets, including the EU, Middle East, and North America.
A side-by-side comparison of Kingflex black elastomeric rubber foam sheets, rolls, and pipes shows their suitability for different installation requirements.
Flexible Surface Area Thermal Solutions
Designed for large-diameter pipelines, ventilation ducts, flat surfaces, and irregular tanks. The structure provides uniform thermal resistance and isolates noise across commercial and industrial HVAC systems.
| Thickness Range | 6mm to 50mm |
| Density Range | 40 to 55 kg/m³ |
| Closed Cell Rate | ≥ 98% |
| Resilience | Compression Recovery ≥ 80% |
| Temperature Range | -40℃ to 105℃ |
Pre-Formed Pipeline Condensation Prevention
Extruded in standard tubular dimensions to slip easily onto copper, steel, and iron pipelines. Helps prevent freezing, condensation, and heat loss in HVAC condensate, water supply, and chemical processing lines.
| Wall Thickness | 9mm to 40mm |
| Inner Diameter (ID) | 6mm to 114mm |
| Extrusion Accuracy | Highly Uniform Core Spraying |
| Fire Safety | Self-extinguishing on flame removal |
| Freezing Protection | Substantially reduces pipe cracking risk |
Kingflex designs and delivers specialized insulation systems across diverse industrial sectors to meet demanding mechanical and environmental requirements.
Prevents condensation and mold growth while reducing energy losses in air handling units, ventilation ducts, and cooling water lines.
Provides thermal control and chemical corrosion protection for high-temperature steam lines and critical industrial piping networks.
Designed for specialized low-temperature installations down to -196°C, such as LNG handling facilities and cryogenic cooling systems.
Transparency is key to our customer relations. Below are verified procurement interactions, highlighting our commitment to quality, specifications, and project logistics.
We offer customized manufacturing solutions, from density formulation to thickness and roll width specifications, tailored to your design requirements.
Kingflex provides full OEM/ODM manufacturing capability for projects with unique insulation parameters. Our mechanical engineers modify base compounds to match custom physical and thermal specifications.
Find answers to common questions about properties, fire ratings, chemical performance, and installation of elastomeric rubber foam insulation.
Elastomeric rubber foam insulation is used to insulate HVAC ductwork, hot and cold water pipes, air conditioning systems, and industrial process lines. Its closed-cell structure helps control heat transfer, prevent surface condensation on cold pipelines, and damp mechanical vibration noise.
Yes, our rubber foam insulation contains flame-retardant additives to meet international safety standards, including BS 476 Class 0 and Class 1, and UL 94 V-0 ratings. It self-extinguishes upon fire removal and does not produce flaming droplets, helping to prevent the spread of fire through building plenums.
Rubber foam is a flexible, closed-cell material with high moisture resistance ($\mu \ge 10,000$). This makes it suitable for cold pipelines and HVAC systems where condensation is a primary concern. Rock wool is an open-cell, fibrous material that withstands higher temperatures, making it a good choice for industrial steam pipes and high-temperature fire stops, though it requires a separate vapor barrier to prevent moisture absorption.
Yes, we support comprehensive OEM/ODM custom services. We can customize dimensions, thicknesses (from 6mm to 50mm), pipe inner diameters (6mm to 114mm), densities, colors, and adhesive backings or foil facings to meet specific project guidelines.
Our products are tested and certified under international standards, including BS 476, CE, REACH, RoHS, UL 94, and ASTM. This compliance helps ensure our materials meet building and environmental regulations in global markets.
Yes, we use a product tracking and quality management system. Every batch is marked with production codes, allowing us to trace the raw material inputs and quality control logs back to our facility in Dacheng.
Our manufacturing lines produce sheet and roll thicknesses from 6mm up to 50mm. This range allows mechanical designers to specify the exact thickness needed to meet target thermal resistance values for different climates.
When installed according to specifications, Kingflex rubber foam insulation typically lasts 10 to 15 years. The lifespan depends on environmental factors, such as UV exposure, mechanical wear, and temperature cycles, which can be mitigated with protective facings.
Explore our specialized range of high-temperature rock wool and low-temperature elastomeric cryogenic insulation solutions.
Our warehouse in Dacheng maintains consistent inventory levels to support prompt domestic and international shipping schedules.
Explore our specialized range of cryogenic and foil-faced elastomeric solutions designed for complex mechanical projects.
Kingflex
