K-FLEX®
PRODUCTS K-FLEX®
K-FLEX® ST
K-FLEX® ST is suitable for all applications both civil and industrial that require the use of insulation material, without neglecting the price/quality relationship: refrigeration, air-conditioning, heating and plumbing, tanks, pipe fittings and water ducts.
Technical specifications
K-FLEX® ST pipe | ||
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Thickness ≤ 25 mm | Thickness > 25 mm | |
TEMPERATURE RANGE | from -165 °C to +110 °C |
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THERMAL CONDUCTIVITY λ W/(m•K) |
||
0 °C | 0.033 | 0.036 |
+40 °C | 0.037 | 0.040 |
CORROSION PREVENTION | pH neutral (7) |
|
PERMEABILITY μ | ≥ 10 000 | ≥ 7000 |
FIRE RATING | Euroclass BL-s2,d0 |

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K-FLEX® ST DUCT
PRODUCT
INFORMATION
K-FLEX® ST DUCT
DECLARATION OF PERFORMANCE
K-FLEX® ST SHEET
K-FLEX® ST SHEET is suitable for all applications both civil and industrial that require the use of insulation material, without neglecting the price/quality relationship: refrigeration, air-conditioning, heating and plumbing, tanks, pipe fittings and water ducts.
Sheets are ideal for sheet metal ducts and large size pipes. The height of 1000/1500 mm minimises segmentation of coating and simplifies installation, greatly reducing time and labour cost.
Available in standard and adhesive.
Technical specifications
K-FLEX® ST SHEET | ||
---|---|---|
Thickness ≤ 25 mm | Thickness > 25 mm | |
TEMPERATURE RANGE | from -165 °C to +85 °C |
|
THERMAL CONDUCTIVITY λ W/(m•K) |
||
0 °C | 0.033 | 0.036 |
+40 °C | 0.037 | 0.040 |
CORROSION PREVENTION | pH neutral (7) |
|
PERMEABILITY μ | ≥ 10 000 | ≥ 7000 |
FIRE RATING | Euroclass BL-s3,d0 |

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K-FLEX® ST SHEET
DECLARATION OF PERFORMANCE
K-FLEX® ST/SK
K-FLEX® ST/SK is suitable for all applications both civil and industrial that require the use of insulation material, without neglecting the price/quality relationship: refrigeration, air-conditioning, heating and plumbing, tanks, pipe fittings and water ducts.
The pipes are cut and provided with a self-adhesive layer.
Technical specifications
K-FLEX® ST/SK pipe | ||
---|---|---|
Thickness ≤ 25 mm | Thickness > 25 mm | |
TEMPERATURE RANGE | from -40 °C to +85 °C |
|
THERMAL CONDUCTIVITY λ W/(m•K) | ||
0 °C | 0.033 | 0.036 |
+40 °C | 0.037 | 0.040 |
CORROSION PREVENTION | pH neutral (7) |
|
PERMEABILITY μ | ≥ 10 000 | ≥ 7000 |
FIRE RATING | Euroclass BL-s2,d0 |

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K-FLEX® ST/SK
DECLARATION OF PERFORMANCE
K-FLEX® ST DUCT
ECONOMICAL: flexible and easy to handle, it is made in measurements of 1500 mm in width to ensure easy installation on ducts.
PRACTICAL: the self-adhesive surface has been made rougher to improve its grip on the metal ducts.
CONVENIENT: its 1500 mm width cuts down on application time, reducing the final cost of pre-fabricated ducts.
FLEXIBLE: high elasticity helps attenuate vibrations that occur where there are joints and suspensions.
Technical specifications
K-FLEX® ST DUCT | ||
---|---|---|
Thickness ≤ 25 mm | Thickness > 25 mm | |
TEMPERATURE RANGE | ||
K-FLEX® ST DUCT sheet | from -40 °C to +85 °C | |
K-FLEX® ST DUCT AL CLAD sheet | from -40 °C to +85 °C | |
K-FLEX® ST DUCT ALU sheet | from -40 °C to +85 °C | |
K-FLEX® ST DUCT COLOR sheet | from -40 °C to +85 °C | |
THERMAL CONDUCTIVITY λ W/(m•K) | ||
0 °C | 0.033 | 0.036 |
+40 °C | 0.037 | 0.040 |
CORROSION PREVENTION | pH neutral (7) |
|
PERMEABILITY μ | ≥ 7000 | ≥ 7000 |
FIRE RATING | ||
K-FLEX® ST DUCT sheet | Euroclass B-s3,d0 | |
K-FLEX® ST DUCT AL CLAD sheet | Euroclass D-s3,d0 | |
K-FLEX® ST DUCT ALU sheet | Euroclass D-s3,d0 | |
K-FLEX® ST DUCT COLOR sheet | Euroclass D-s3,d0 |


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K-FLEX® ST DUCT
PRODUCT
INFORMATION
K-FLEX® ST DUCT ALU
PRODUCT
INFORMATION
K-FLEX® ST DUCT
DECLARATION OF PERFORMANCE
K-FLEX® ST DUCT ALU
DECLARATION OF PERFORMANCE
K-FLEX® KRAFT
K-FLEX® KRAFT has been specially produced to insulate ventilation and air-conditioning ducts in indoor environments. It is a modern replacement for mineral wool insulation.
ECONOMIC: the self-adhesive strip reinforced with ALU foil is flexible and easy to use. It is produced in 1,500 mm widths in order to ensure easy installation on the ducts. Using K-FLEX KRAFT, it is possible to minimise the underhang of ductwork from ceiling structures. The lower weight of these materials provides financial savings on structural supports.
PRACTICAL: the self-adhesive surface has been roughened to improve its adhesion to metal ducts, without the need for spikes or other tools. No dusting of fibres takes place as is the case with mineral wools.
COMFORTABLE: easy installation at the place of assembly, makes it possible to pre-insulate air ducts.
FLEXIBLE: Applying self-adhesive panels directly to the AC ductwork minimises vibrations throughout the HVAC system and improves overall acoustic comfort.
Technical specifications
K-FLEX®KRAFT sheet | ||
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Thickness ≤ 25 mm | Thickness > 25 mm | |
TEMPERATURE RANGE | from -40 °C to +85 °C | |
THERMAL CONDUCTIVITY λ W/(m•K) | ||
0 °C | 0.033 | 0.036 |
+40 °C | 0.037 | 0.040 |
CORROSION PREVENTION | pH neutral (7±0,5) |
|
PERMEABILITY μ | ≥ 10 000 | ≥ 7000 |
FIRE RATING | Euroclass E |

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K-FLEX® KRAFT
DECLARATION OF PERFORMANCE
K-FLEX® ACCESSORIES
K-FLEX® ST ANTICONDENSATION TAPE
Highly flexible closed cell elastomeric foam (FEF) suitable for hot and cold thermal insulation, featuring a combination of low thermal conductivity, high water vapour diffusion resistance and low flame spread.
Applications:
Pipes, ducts, tanks, applied for refrigeration, air conditioning, heating and plumbing, pipe fittings and water ducts, industrial aplications for energy saving and/or condensation prevention purposed.
Technical specifications
K-FLEX® ST ANTICONDENSATION TAPE | |
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DIMENSIONAL TOLERANCES | as per EN14304 |
HEIGHTS | 15 - 25 - 30 - 50 - 75 - 100 mm |
LENGTHS | 10–15 m |
THICKNESSES | 3 mm |
LEACHABLE CHLORIDES (EN 13468) | <500 ppm (when tested in line with DIN1988/7, leachable chlorides <0.05%) |
MAXIMUM SERVICE TEMPERATURE | 85 °C |
MINIMUM SERVICE TEMPERATURE | 40 °C |
pH (EN 13468) | Neutral (7±1) |
REACTION TO FIRE (EN 13501) | Euroclass B, s2, d0 |
THERMAL CONDUCTIVITY λ | 0,033 at 0 °C |
WATER ABSORPTION (EN 13472) | <0,1 % |
WATER VAPOUR DIFFUSION RESISTANCE (EN 12086) | µ ≥ 7 000 |

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K-FLEX® ST ANTICONDENSATION TAPE
DECLARATION OF PERFORMANCE
K-FLEX® K-414 ADHESIVE
One component glue (Polychloroprene Adhesive). Suitable for insulation in heating and refrigeration systems.
Glue have been specifically designed for use with K-FLEX® elastomeric foam insulation material. The securely bonded surface and joints are resistant to ageing and atmospheric agents, and preserve the technical characteristics of the insulating material.
Technical specifications
K-FLEX® K-414 ADHESIVE | |
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APPLICATION TEMPERATURE RANGE | Ideal 10–30 °C |
COLOURS | Brown |
PACKAGING | 0,5 l; 0,8 l; 2,6 l |
TEMPERATURE RANGE | 0–110 °C |
VISCOSITY AT 20° | 600 mPa.s |
DRYING TIME | 5–7 minutes |
BONDING TIME | up to 30 minutes |
SETTING TIME | 72 hours |
LEED COMPLIANT | No |

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K-FLEX® K-414 ADHESIVE
MATERIAL SAFETY
K-FLEX® K-420 ADHESIVE
One component glue (Polychloroprene Adhesive). Suitable for insulation in heating and refrigeration systems or industrial applications.
Glue have been specifically designed for use with K-FLEX® elastomeric foam insulation material. The securely bonded surface and joints are resistant to ageing and atmospheric agents, and preserve the technical characteristics of the insulating material.
Technical specifications
K-FLEX® K-420 ADHESIVE | |
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APPLICATION TEMPERATURE RANGE | Ideal 10–30 °C |
COLOURS | Yellow |
PACKAGING | 0,26 l; 1 l; 2,6 l |
TEMPERATURE RANGE | -40–110 °C |
VISCOSITY AT 20° | 700 mPa.s |
DRYING TIME | 5–7 minutes |
BONDING TIME | up to 30 minutes |
SETTING TIME | 72 hours |
LEED COMPLIANT | No |

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K-FLEX® K-420 ADHESIVE
MATERIAL SAFETY
SPECIAL THINNER FOR K-FLEX® ADHESIVES
Before covering the surfaces to be insulated, it is advisable to clean them with the special K-FLEX® thinners which, thanks to its composition, is also suitable for use with K 414, K 420 or K 425 adhesives. Cleaning of all surfaces with the special K-FLEX® thinners also improves the performance of the adhesives.The special K-FLEX® thinners can be also used for cleaning brushes and spatulas used to spread the glue. Available in 1 litre tins.

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SPECIAL THINNER FOR K-FLEX® ADHESIVES
MATERIAL SAFETY