Sheets

We offer thermal insulation made from synthetic rubber foam in the form of K-Flex brand sheets. The insulation sheets are characterized by very good flexibility and high resistance to water vapour diffusion, as well as low thermal conductivity. They are recommended for creating durable and tight insulation for pipes and tanks in ventilation, air conditioning, industrial, heating, and sanitary installations. Also available in self-adhesive versions. They are a convenient and versatile solution for insulating large surfaces that can be customized to specific dimensions and shapes. K-Flex sheets are available in various versions: standard, with protective aluminum coating, dedicated for air ducts, with a composite protective coating, with acoustic insulation and expansion joints. When insulating outdoor installations, sheets with a factory-applied external protective jacket should be used.

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K-Flex standard sheets (K-FLEX ST) properties

Closed cellular structure foam rubber insulation
Suitable for commercial and industrial applications that require the use of insulation material: refrigeration, air conditioning, heating, hydraulics, tanks, pipeline fittings, and water ducts
Used for insulating large surfaces
Mats with widths of 1000/1500 mm are an ideal insulation material for ventilation ducts, large-diameter pipes, and fittings
Minimises segmentation of the coating and simplifies installation, greatly reducing time and labour cost
High performance properties
Prevents the risk of condensation and improves energy saving
Resistant to mould, fungi, and bacteria
Light and flexible
Temperature range [Test method: EN 14706; EN 14707]: -165 °C to +85 °C
Thermal conductivity [λ W/(m•K); Test method: EN 13787, EN ISO 8497]:
- Thickness ≤ 25mm:
  - 0 °C = 0.033
  - +40 °C = 0.037
- Thickness > 25mm:
  - 0 °C = 0.036
  - +40 °C = 0.040

Fire rating [ Test method: EN 13501-1]: Euroclass B-s3, d0
Corrosion prevention [Test method: EN 13468]: pH neutral (7)
Thickness * [mm]: 3, 6, 10, 13, 19, 25, 32, 40, 50
Length * [mm]: 4,000 - 60,000
Width * [mm]: 1,000
Water vapour permeability μ [Test method: EN 12086]:
- Thickness ≤ 25mm: ≥ 10,000
- Thickness > 25mm: ≥ 7,000
Approvals: Environmental Product Declarations EPD, R1-HL2, ECO-BAU, and MINERGIE-ECO, CE-MARINE (Bureau Veritas), ABS (American Bureau of Shipping), DNV, Lloyd's Register, UL94, FM Approval

K-Flex standard sheets with aluminium jacketing (K-FLEX ST ALU)

Aluminium-PET 4-layer lining in combination with K-FLEX ST elastomeric foam
Temperature range: -40 °C to +85 °C
Fire rating: Euroclass C-s3,d0

* Tolerances: length: +5% ÷ -1.5% (rolls); ±1.5% (sheets), width: ±2%; thickness: 3mm and 6 mm: ±1 mm, from 9 mm to 19 mm: ±1.5 mm, 25 mm and more: ±2 mm; in self-adhesive sheets with a thickness of 40 mm and 50 mm, the adhesive coating is for positioning the sheet only. We recommend installation using the adhesive system.

Duct insulation sheets (K-FLEX ST DUCT)

Insulation sheets made from synthetic rubber designed for insulating air ducting
The self-adhesive surface has been made rougher to improve its grip on the metal ducts
High flexibility helps attenuate vibrations that occur where there are joints and suspensions
Flexible and easy to install in ducts
Self-adhesive version available
Temperature range [Test method: EN 14706; EN 14707]: -40 °C to +85 °C
Thickness * [mm]: 6,8,10,12,15,20,30
Length * [mm]: 6 000 – 30 000
Width * [mm]: 1 500
Fire rating [ Test method: EN 13501-1]: Euroclass B-s3, d0
Corrosion prevention [Test method: EN 13468]: pH neutral (7)
Thermal conductivity [λ W/(m•K); Test method: EN 13787, EN ISO 8497]:
- Thickness ≤ 25mm:
  - 0 °C = 0.033
  - +40 °C = 0.037
- Thickness > 25mm:
  - 0 °C = 0.036
  - +40 °C = 0.040
Water vapour permeability μ [Test method: EN 12086]: ≥ 7000

Duct insulation sheets (K-FLEX ST DUCT ALU)

Elastomeric self-adhesive sheet with reinforced mesh and a smooth aluminium 80 μ thick covering and width: 1500 mm
Flexible and easy to install in ducts
The self-adhesive surface has been made rougher to improve its grip on the metal ducts
High flexibility helps attenuate vibrations that occur where there are joints and suspensions
Temperature range [Test method: EN 14706; EN 14707]: -40 °C to +85 °C
Thickness * [mm]: 6,8,10,12,15,20,30
Length * [mm]: 6 000 – 30 000
Width * [mm]: 1 500
Fire rating [ Test method: EN 13501-1]: Euroclass C-s3, d0
Corrosion prevention [Test method: EN 13468]: pH neutral (7)
Thermal conductivity [λ W/(m•K); Test method: EN 13787, EN ISO 8497]:
- Thickness ≤ 25mm:
  - 0 °C = 0.033
  - +40 °C = 0.037
- Thickness > 25mm:
  - 0 °C = 0.036
  - +40 °C = 0.040

Sheet with composite protective jacket (K-FLEX AL CLAD)

Elastomeric self-adhesive sheet, with reinforced mesh and AL CLAD covering
Available in standard and self-adhesive versions
Designed for insulating ventilation ducts, large-diameter pipes, and tanks
Resistant to UV rays and atmospheric conditions
Durable and shock-resistant, reducing application time
Flexible and universal
Reducing installation costs
Material:
- Multi-layer PVC-Alu bonded with elastomeric insulation
- Multi-layer PCV-Alu bonded with elastomeric insulation
Temperature range: -40 °C to +85 °C
Thickness * [mm]: 6,10,13,19,25,32,40,50
Length * [mm]: 4 000 – 30 000
Width * [mm]: 1 000
Fire rating [ Test method: EN 13501-1]: Euroclass D-s3, d0

Sheets with acoustic insulation (K-FONIK GK)

High-density elastomeric acoustic insulating panel
Acoustic insulation solution for building partitions, ventilation systems, machines and equipment in the OEM sector, etc.
The product is lead-free and other toxic additives therefore is safe for health
Used as a mass barrier. Its special sound insulation characteristics make it an excellent product for insulation of walls and ceilings and and other building partitions
Characterized by very high acoustic insulation properties
Resistant to UV radiation
Universal and flexible
Reduces installation costs
Temperature range: -40°C to +70°C
Thickness [mm]: 2
Length [mm]: 1,000 – 20,000
Width [mm]: 1,000
Acoustic parameters: Rw (C;Ctr)=27(-1;-4)dB
Fire rating: B-s3, d0
Density: 2000 kg/m3 (±10%)

Expansion Joint (K-FONIK GK)

Thickness [mm]: 2
Length [mm]: 55 – 125
Width [mm]: 2,000
Applications:
- Physically separating the framework of light construction from the building's main structure
- As an expansion joint between gypsum board layers and the suspended ceiling framework in high noise environments
- As horizontal/vertical expansion joints in walls built using traditional materials like brick, block, or stone
- As an intermediate layer between wooden beams and the floor in wooden structures.
- For acoustic isolation of walls with a frame structure from adjacent floors, ceilings, and walls
- As vibration-damping spacers in machine and equipment enclosure

Characteristics of K-Flex sheets:

Flexibility and adaptability. K-Flex sheets are flexible, allowing for easy adaptation to various shapes and surfaces. This is particularly useful for insulating non-standard shapes.
Temperature resistance. K-Flex sheets are designed to work within a wide temperature range, both low and high temperatures (-165°C to +85°C depending on the product range).
Resistance to condensation. The insulation provided by K-Flex sheets helps prevent moisture condensation on insulated surfaces.
Insulation materials. K-Flex sheets can be made from various materials, such as thermoplastic elastomers, synthetic rubbers, or polyethylene foam, depending on insulation requirements.
Fire resistance. Depending on the type of sheet, some K-Flex versions may have enhanced fire resistance.
Easy installation. Sheets are supplied as flat pieces that can be easily cut and customized as needed. Installing K-Flex sheets is relatively straightforward and can be done using appropriate tools.
Acoustic insulation. In some cases, K-Flex sheets may also offer certain acoustic insulation properties, help in noise reduction.