Why architectural specifiers, design engineers, and global procurement departments are migrating from traditional NBR/PVC foams to Halogen-Free Elastomeric materials.
Traditional elastomeric rubber foam insulation relies heavily on halogenated compounds (containing chlorine or bromine) to achieve fire retardancy. While effective at suppressing flames, halogenated insulation materials release highly toxic and corrosive gases—such as Hydrogen Chloride (HCl) and Hydrogen Bromide (HBr)—upon combustion. When mixed with atmospheric moisture, these gases generate acids that damage human respiratory systems and corrode expensive microelectronics.
Halogen-Free Elastomeric Thermal Insulation resolves this safety issue. Manufactured with innovative mineral flame retardants like Alumina Trihydrate (ATH) or Magnesium Hydroxide, this material undergoes endothermic decomposition when exposed to fire, releasing only non-toxic water vapor and forming a protective char barrier. It is completely free from chlorine, bromine, fluorine, and iodine, satisfying strict environmental demands and building regulations worldwide.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Our R&D and manufacturing departments are based in Dacheng, China—renowned as the capital of green building materials. As an energy-saving, environmentally friendly enterprise, we specialize in the research, development, production, and sale of advanced insulation materials.
Kingflex was established by the Jinwei Group, which boasts a rich legacy spanning more than 40 years. Founded in 1979, the group was the pioneer manufacturer of thermal insulation materials north of the Yangtze River. Today, Kingflex carries this legacy forward with a focus on energy conservation, offering holistic insulation systems through consultation, design, production, installation guidance, and post-sale support.
How our integrated manufacturing hub in Dacheng delivers world-class performance, strict safety compliance, and cost efficiency.
Kingflex operates 5 large-scale automatic assembly lines with a yearly capacity exceeding 600,000 cubic meters. This automated infrastructure ensures uniform cell foaming, dimensional precision, and structural stability across every batch of sheet rolls and tube pipes.
Our halogen-free formulations undergo strict testing to satisfy international criteria, including BS 476, CE, REACH, RoHS, UL94, and ASTM. This guarantees that our products meet the low-smoke, flame-retardant requirements of demanding municipal projects.
Every roll and tube produced at our factory is tracked from raw material mixing to foaming. With 8 professional engineers in our R&D department and dedicated testing labs, we deliver continuous material optimization to solve the most difficult temperature control challenges.
Detailed specifications for our standard halogen-free elastomeric rubber foam sheets and tube pipes.
| Material Category | Standard Thickness Range | Internal Diameter (ID) | Bulk Density | Operational Temp. Range | Key Properties |
|---|---|---|---|---|---|
| Halogen-Free Sheet & Rolls | 6mm - 50mm | N/A | 40 - 55 kg/m³ | -40℃ to 105℃ | Closed-cell structure, low smoke toxicity, excellent moisture barrier. |
| Halogen-Free Insulation Tubes | 9mm - 40mm | 6mm - 114mm (1/4" to 4" ID) | 40 - 55 kg/m³ | -40℃ to 105℃ | High compression resilience, quick slide-on installation, zero halogen corrosive gases. |
| Cryogenic & Low-Temp Systems | Custom Layered Designs | Project Specific | 50 - 65 kg/m³ | -200℃ to 150℃ | Designed for LNG piping, heavy industrial gas pipelines, and cryogenic storage. |
| Sound Absorbing Open-Cell Foam | 10mm - 50mm | N/A | 35 - 50 kg/m³ | -40℃ to 85℃ | Engineered for acoustic insulation in complex HVAC machine rooms. |
Where Halogen-Free insulation is critical for safety, environmental compliance, and asset protection.
On offshore platforms and ships, fires can quickly fill enclosed spaces with toxic fumes. Halogen-free insulation is critical to protect passenger corridors and crew quarters. It minimizes the risk of toxic gas inhalation, giving crew members vital extra minutes to evacuate during emergency events.
Rail systems require insulation that complies with EN 45545-2 (Hazard Level HL3) or equivalent standards. Our flexible halogen-free sheet rolls and pipes prevent fire propagation, emit negligible smoke, and release no acid fumes that could damage electrical transit lines.
Data centers, computer server rooms, and microchip fabs contain high concentrations of electronics sensitive to chemical outgassing. Traditional halogenated insulation can release trace acid vapors that erode delicate microcircuits. Halogen-free foam preserves air purity and protects expensive silicon wafers.
Specifying halogen-free insulation in ductworks and chiller pipes helps projects achieve credits in building rating schemes like LEED, BREEAM, and DGNB. This makes it a preferred material for green building designs worldwide.
Our cryogenic systems prevent heat gain in extremely cold pipelines containing liquefied gases. The halogen-free composition remains flexible at low temperatures, minimizing the risk of thermal cracking under intense contraction cycles.
Dual-temperature pipes and solar collection networks experience intense thermal cycling. Kingflex halogen-free materials can withstand continuous operational temperatures up to 105°C without decomposing or degrading, ensuring long-term thermal performance.
A look inside Kingflex's engineering facilities, showing how we develop and verify our high-performance insulation materials.
Our team is composed of talented individuals who share a vision of delivering consistent, high-quality service for our clients. Kingflex employs 8 professional engineers in our R&D Department, 6 international sales consultants, and 230 manufacturing specialists.
By investing in testing equipment, we analyze key physical parameters like thermal conductivity, water vapor permeability, flame resistance, and density in-house. This continuous research allows us to customize product properties to meet specific project needs.
Kingflex insulation materials are manufactured under ISO 9001 and ISO 14001 management protocols. Our products are tested and certified by independent laboratories to meet standard fire safety, toxicity, and environmental codes worldwide.
Key factors for purchasing directors when sourcing halogen-free insulation from Chinese manufacturing centers.
Ensure suppliers provide testing certificates verifying halogen content remains below detectable thresholds (per EN 14582 or equivalent standards). Products should contain 0% chlorine and bromine compounds.
Confirm the manufacturer can scale production to meet project schedules. With 5 automated lines and a 600,000 m³ annual capacity, Kingflex ensures consistent material supply for large projects.
Select manufacturers with batch-level traceability. Kingflex tracks every product from raw material compounding to final curing, helping buyers meet their quality control requirements.
Our focus on quality has built long-term trust with engineering offices and mechanical contractors worldwide.
A selection of projects using our elastomeric thermal sheets and insulation tubes.
Detailed answers to common technical, design, and sourcing questions about halogen-free elastomeric insulation.
Kingflex
