Kingflex Kingflex

China Kingflex Class 0 Class 1 high-end rubber foam insulation products Manufacturer, Factory

Kingflex Class 0 Class 1 high-end rubber foam insulation products specially introduced international advanced technology and Technique, using excellent butadiene rubber as the main raw material. Our China's unique Vacuum Microcrystal Foaming Technique, referred to as VMFT, contribute in micro foaming and providing our product with dense cells, high closed cell rate. Normal wall thicknesses of 1/4”, 3/8″, 1/2″, 3/4″,1″, 1-1/4”, 1-1/2″ and 2” (6, 9, 13, 19, 25 , 32, 40 and 50mm). Standard Length with 6ft (1.83m) or 6.2ft(2m).

Product Description

Technical Data
Property Unit Value Test Method
Temperature range °C (-50 - 110) GB/T 17794-1999
Density range Kg/m³ 45-65Kg/m³ ASTM D1667
Water vapor permeability Kg/(m.s.pa) ≤0.91×10⁻¹³ DIN 52 615 / BS 4370 Part 2 1973
μ - ≥10000 -
Thermal Conductivity W/(m.k) ≤0.030 (-20°C) ASTM C 518
≤0.032 (0°C)
≤0.036 (40°C)
Fire Rating - Class 0 & Class 1 BS 476 Part 6 part 7
Flame Spread and Smoke Developed Index - 25/50 ASTM E 84
Oxygen Index - ≥36 GB/T 2406, ISO4589
Water Absorption, % by Volume % 20% ASTM C 209
Dimension Stability - ≤5 ASTM C534
Fungi resistance - Good ASTM 21
Ozone resistance Good GB/T 7762-1987
Resistance to U.V. and weather Good ASTM G23
Key Features & Benefits

Excellent Fire Performance

Approved by BS476 standards. Customers can choose Class 0 or Class 1 according to requirements. Highly self-extinguishing with no drips under ASTM D635-91 testing.

Low Thermal Conductivity

An ideal choice for energy saving. Features a very low thermal conductivity rating of ≤0.034 W/m.K, ensuring minimal thermal energy transfer.

Eco-Friendly Construction

Designed without dust or fibers. Free from CFCs, features low VOCs emissions, and provides zero fungal growth along with negligible bacterial growth.

Easy Installation

Highly flexible material that can bend easily around irregular pipes. Simple to cut into different shapes and sizes, reducing installation labor and material waste.

Customizable Colors

Available in multiple colors such as red, blue, green, grey, yellow, and more. Provides a clean finished look and makes identification simple during maintenance.

Frequently Asked Questions
What fire ratings does the rubber foam insulation support?
The rubber foam insulation is approved by BS476 standards. Depending on project specifications, you can choose either Class 0 or Class 1 fire ratings. Additionally, it is self-extinguishing with zero dripping according to ASTM D635-91.
How energy-efficient is this rubber foam material?
It offers high thermal efficiency due to its low thermal conductivity (≤0.030 W/m.K at -20°C, and ≤0.034 W/m.K as a standard choice), which effectively minimizes temperature transfer and reduces energy consumption.
Is the insulation material safe and eco-friendly?
Yes. It is completely fiber-free and dust-free. It is manufactured without CFCs, releases low VOCs, and has excellent resistance to fungal and bacterial growth, maintaining a clean indoor environment.
Can this insulation be used on complex piping layouts?
Absolutely. Thanks to its highly flexible composition, the foam is easy to bend around irregular curves and structural components. It can be easily cut to fit any pipe size or shape, minimizing labor and wastage.
Why are custom color coatings beneficial?
Color customization (including red, blue, green, grey, and yellow) helps visually differentiate pipelines (e.g., hot vs. cold water lines) for quick identification and simplified maintenance processes.
What is the functional temperature limit of this product?
The material operates effectively within a broad temperature range of -50°C to 110°C, tested in compliance with GB/T 17794-1999 standards.

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