K-FLEX K-FIRE BATT is a coated mineral wool board used to reinstate the fire resistance performance of wall constructions where they have been provided with apertures for the penetration of single or multiple services. K-FLEX K-FIRE BATT together with K-FLEX K-FIRE SEALANT A are designed to prevent the passage of fire and smoke between compartment walls whilst still allowing the installation of services. K-FLEX K-FIRE SEALANT A is required to seal all joints and junctions during the sealing process. K-FLEX K-FIRE HP SEALANT is required to seal around specific services This system is tested according both EN1366-3 and BS476 pt 20/22 giving a fire resistance and smoke barrier for up to 240 minutes.

CE Marked 1121-CPR-JA5096
ETA 15-0779
ETAG 026-2 (2011) according EN 1366-3 Penetration Seals




K-FLEX K-FIRE BATT - 1200 x 600 x 50 mm board 1
K-FLEX K-FIRE BATT - 1200 x 600 x 60 mm board 1



Test method

Fire Rating

Up to EI 240  EN 1633-3  

Tested penetration seal in

Flexible walls: min. thickness 100 mm;
Rigid walls: min. thickness of 100 mm;


Tested service penetration

- Copper pipe up to Ø159mm + MW insulation;
- Steel or Copper conduits up to Ø16mm;
- Cable bundles up to Ø100mm;
- Cable trays and ladders;
- Cable conduits up to Ø16mm;
- Max aperture size: 730 x 1200 mm

*MW: Mineral Wool


Durability and serviceability

Type Z1: Intended for use in internal conditions, excluding temperature below 0°C, without exposure to rain or UV.

 EOTA TR 024:2009

Storing temperature

-5 °C to 30 °C  


> 140 kg/m3


Air Permeability

600 Pa EN 1026

Thermal Conductivity

0.034 W/mK at 10°C  

Acoustic performances

Up to 24Rw (Single 50mm Batt )
Up to 48Rw (Double 50mm Batt )

EN 10140

Ecological data

Low Ozone Depletion Potential (ODP)
Low Global Warming Potential (GWP)
Contributes to Green Building.
L’ISOLANTE K-FLEX reserves the right to change data and technical requirements without notice.
Contact us for more information.





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