K-FIRE SEALANT A PLUS is a fire resistant water based acoustic acrylic sealant, designed for internal use with fire and smoke resisting gaps and service penetrating capability. K-FIRE SEALANT A PLUS can be used where a low movement fire resistant and/or acoustic joint is required. K-FIRE SEALANT A PLUS provides good adhesion to most common building materials like brick, concrete, plasterboard, wood etc.

- Construction joints in fire partitioning walls and floors;
- Acoustic seals around perimeters of fire resistant partitions;
- Gaps behind fire resistant door casings;
- Seating of fire resistant grills, intumescent pipe closers, etc.;
- Around metallic pipes;
- Around cable penetrations.

CE Marked 0843-CPR-0284
ETA 15-0818
ETAG 026-2 (2011) according EN 1366-3 Penetration Seals
ETA 15-0795
ETAG 026-3 (2011) according EN 1366-4 Linear Joint and Gap Seals





K-FLEX K-FIRE SEALANT A PLUS - 310 ml cartridge, white 25
K-FLEX K-FIRE SEALANT A PLUS - 310 ml cartridge, grey 25
K-FLEX K-FIRE SEALANT A PLUS - 600 ml sausage, white 12
K-FLEX K-FIRE SEALANT A PLUS - 600 ml sausage, grey 12



Test method

Fire Rating

Up to EI 240   

EN 1366-3
EN 1366-4

Tested penetration seal In

Flexible walls: min. thickness 100 mm
Rigid walls: min. thickness of 100 mm
Rigid floors: min. thickness of 150 mm

Tested service penetration

- Copper pipes up to Ø35mm
- Copper pipes up to Ø54mm + MW insulation
- Steel pipes up to Ø89mm
- Steel pipes up to Ø219mm + MW insulation
- Electrical Cables in bundles
- Telecom Cables in bundles
- Linear Joint up to W50 + backing material

*MW: Mineral Wool

Durability and serviceability

Type Z1: Intended for use at internal conditions, excluding temperature below 0°C.

EOTA TR 024:2009

Application temperature range

+5°C to +40°C  

Storing temperature range

+5°C to +30°C  


1.64 g/ml  

Water solubility


Ecological data

Halogen Free
Dust Free
L’ISOLANTE K-FLEX reserves the right to change data and technical requirements without notice.
Contact us for more information.





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