Kingflex
Sri Lanka presents a unique set of thermal challenges for engineers and project managers. Characterized by high ambient temperatures ranging from 28°C to 34°C and relative humidity levels often exceeding 85% in coastal regions like Colombo, Negombo, and Galle, control of condensation is critical. When cold or chilled water lines are poorly insulated, condensation forms rapidly, leading to the dreaded "sick building syndrome," structural damage, mold growth, and severe system corrosion.
Standard open-cell insulation materials absorb atmospheric moisture, resulting in a dramatic loss of thermal performance. High-quality NBR/PVC closed-cell elastomeric rubber foam insulation rolls provide a continuous, high-resistance vapor barrier. With an inherent water vapor resistance factor (μ-value) exceeding 10,000, our rubber foam sheets prevent moisture penetration and guarantee stable, long-term thermal conductivity ($\le 0.034 \text{ W/(m}\cdot\text{K)}$ at 0°C).
The rapid expansion of the Colombo Port City, luxury hospitality projects, and the expansion of the apparel industry in regions like Biyagama, Katunayake, and Seethawaka have driven demand for certified, energy-saving construction materials. Cleanrooms in apparel and textile factories demand insulation materials that do not shed fibers or harbor dust. This makes Kingflex rubber foam insulation sheets the standard choice over traditional fiberglass and rock wool for central AC ducting and process pipework.
Kingflex Insulation Co., Ltd. is a professional manufacturing and trading combo for thermal insulation products. Our research, development, and production department is located in the well-known capital of green-building materials in Dacheng, China. We are an energy-saving, environmentally friendly enterprise concentrating on research, development, production, and sales. In operation, Kingflex takes energy saving and consumption reduction as its core concept.
We provide comprehensive solutions regarding insulation by means of consulting, research and development, production, installation guidance, and post-sale service to lead the development of the global building materials industry.
Established by the Jinwei Group, which boasts a history of more than 40 years, our roots date back to the group's founding in 1979. Jinwei Group was the first manufacturer of thermal insulation materials north of the Yangtze River. Today, Kingflex carries that legacy forward with state-of-the-art technology and globally recognized compliance certificates.
Our employees are amazing in their own right, but together they are what makes Kingflex such a fun and 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. Kingflex has eight professional engineers in our R & D Department, 6 professional international sales specialists, and 230 workers in our production department.
At present, Kingflex operates 5 large automatic assembly lines with an annual production capacity of more than 600,000 cubic meters. We have become a designated production enterprise appointed by the Ministry of Energy, the Ministry of Electric Power, and the Ministry of Chemical Industry in China.
Our thermal insulation products are widely used in construction, petroleum, chemical, national defense, aerospace, and other industries. In the past 16 years, Kingflex products have been exported to more than sixty-six countries all over the world, proving our global reliability.
We undergo rigorous testing to ensure our materials stand up to international building codes, maritime requirements, and green-building protocols.
Selecting the right insulation material requires reviewing mechanical and thermodynamic traits. Below is a comparison of standard Kingflex specifications against standard open-cell materials used in Southern Asia markets.
| Technical Property | Kingflex Elastomeric NBR/PVC | Glass/Rock Wool alternative | Performance Impact in Sri Lanka |
|---|---|---|---|
| Thermal Conductivity ($\lambda$) | $\le 0.034 \text{ W/(m}\cdot\text{K)}$ at 0°C | $\approx 0.040 \text{ W/(m}\cdot\text{K)}$ | Saves cooling energy in air-conditioned buildings. |
| Vapor Resistance ($\mu$) | $\ge 10,000$ (Inherent closed-cell barrier) | Requires external foil jacket | Zero risk of condensation in high-humidity Colombo. |
| Service Temperature | -40°C to +105°C | up to +400°C | Excellent for chilled/hot water, air ducting. |
| Density | 40 to 55 kg/m³ | 60 to 120 kg/m³ | Lightweight, easy to install on high-rise suspended ductwork. |
| Fire Safety Rating | BS 476 Class 0 & 1, UL94 V-0 | Non-combustible | Prevents fire spread and limits toxic smoke generation. |
| Chemical/Saline Resistance | High (NBR formulation) | Medium (fibers degrade) | Resists salt air in coastal Sri Lankan resorts and ports. |
Ideal for insulating large flat surfaces, square air conditioning ducts, heavy industrial vessels, and large-diameter pipelines. The flexible nature of our NBR/PVC sheets allows for rapid, seamless cutting and wrapping around complex geometries, cutting labor times significantly.
Material: NBR/PVC | Thickness: 6mm - 50mm | Density: 40-55 kg/m³ | Service Temperature Range: -40℃ to 105℃
Specifically extruded to slip over standard copper refrigeration tubes and steel piping networks. Our pipe series prevents outdoor heat gain on suction lines and maintains chilled water supply lines at optimum design temperatures without surface condensation.
Material: NBR/PVC | Thickness: 9mm - 40mm | ID (Inner Diameter): 6mm - 114mm | Density: 40-55 kg/m³ | Service Temperature Range: -40℃ to 105℃
Our research and development team, supported by 8 experienced chemical engineers, optimizes NBR and PVC polymer blends to improve elasticity, fire safety, and environmental compatibility.
Using advanced horizontal foaming tunnels, we maintain control over nitrogen gas injection, ensuring cell structures remain small, uniform, and 98%+ closed-cell.
Every production run is tested for density, thickness, thermal conductivity, and fire propagation to guarantee compliance with BS 476, Class 0, and ASTM criteria.
Local Sri Lankan distributors often carry limited stock of rubber insulation sheets, leading to project delays when large-scale quantities are required. By ordering directly from our manufacturing facility in China, procurement managers can secure consistent supply, custom sizes (including specific wall thicknesses and self-adhesive backings), and highly competitive pricing.
We work directly with major logistics carriers servicing routes from Tianjin Port to the Port of Colombo. Our sales staff handles export documentation, ensuring smooth customs clearance through Sri Lankan authorities.
Every commercial development has specific requirements. Kingflex offers extensive customization options, including:
A1: It is mainly used for HVAC ducts, air conditioning pipes, building thermal insulation, industrial pipeline cold insulation and sound insulation.
A2: Yes, our rubber foam insulation is fire retardant, which meets the safety standards of building and industrial projects.
A3: Rubber foam is flexible, closed-cell and moisture-proof, suitable for HVAC and building insulation; Rock wool is high-temperature resistant and fireproof, suitable for industrial high-temperature pipeline insulation.
A4: Yes, we support OEM service to meet different project needs.
A5: Our products have passed BS 476, CE, REACH, ROHS, UL94, ASTM and other international certifications, ensuring product quality and compliance with global standards.
A6: Yes, Kingflex products have full batch and production traceability.
A7: We can produce from 6mm to 50mm thickness.
A8: It will be about 10 to 15 years under standard operating conditions.
A9: We support Sri Lankan projects by providing container-load direct shipping from our factory to the Port of Colombo. We also offer comprehensive calculations for thickness requirements based on Sri Lanka's ambient temperature (up to 35°C) and relative humidity (up to 90%) to guarantee no condensation forms on the pipes.
A10: Yes. The high NBR (Nitrile Butadiene Rubber) content in our formulation gives the material excellent resilience against atmospheric salts, chemical vapors, and moisture, preventing the degradation commonly seen with glass wool under coastal conditions.
Connect directly with our engineering and logistics department in China to receive a customized volume quote for your projects in Sri Lanka.
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