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The new NADI® sealing system

The new NADI® sealing system for retrofitting improves sound absorption values and updates existing fire doors to smoke doors.

As the first and as yet only system on the market, NADI® has a flexible and resiliently mounted sealing profile which effectively balances out and withstands heat deformation of the door leaf > 10 mm, and optionally even > 14 mm.

NADI®  satisfies the requirements of DIN 18095 and the new EN 1634 European standard for use as retrofitted smoke control in existing fire doors.

Seals for retrofitting of:

  • Smoke, fire and acoustic doors
  • Damp and wet room doors
  • For single and double-wing doors
  • Thin and thick rebate doors, flushfit doors
  • Suitable for doors made of wood, metal, plastic, and glass
  • Innovative sealing system for subsequent upgrading for smoke protection.*
  • Noise-reduced door closing with damping function
  • Quick, secure and inexpensive installation thanks to preformed corners
  • Maintenance free system
  • Can be installed without removing the door in stock
  • No additional sealing measures required
  • Elegant, snap-on cover profile without any visible screws. Surface silver-coloured, anodised (C-0)

  Fire doors

  Acoustic doors

  Closes with a tight seal

  Damp room doors

  Barrier-free access

  Smoke control


for reveal mounting
  • For single and double-wing doors
  • Optionally with automatic seals for retrofitting Schall-Ex® L-15 FS




for flush-fit installation
  • For single and double-wing hinged doors
  • Optionally with automatic seals for retrofitting Schall-Ex® L-15 FS




Schall-Ex® L-15 FS

Outstanding sound insulation for retrofitting
  • For sealing heights up to 20 mm
  • Click-in cover profile
  • Concealed screws

Sealing profile 102

  • For increased requirements up to 14 mm tolerance compensation
  • Self-extinguishing silicone, colour: grey

Sealing system for retrofitting of smoke dampers


for reveal mounting
  • For single-wing smoke dampers
  • For reinforcement of fire/smoke dampers
  • Pre-formed corners


for flush-fit installation
  • For single-wing smoke dampers
  • For reinforcement of fire/smoke dampers

Smoke control

DIN 18095-2
This standard contains requirements for smoke control doors, regardless of the materials they are made of. Smoke control doors which comply with this standard are suitable for preventing the spread of smoke in buildings. The standard covers single-wing and double-wing hinged doors; other types of doors such as sliding doors, roller shutters and sectional doors etc. do not fall within the scope of this standard.

DIN EN 1634-3
Test standard: Smoke control door seals This European standard relates to fire and/or smoke control properties only, including the ability to approve automatic closing. 

Smoke control door
Seal intended to restrict the entry of smoke within specified limits when it is closed. This is done in such a way that in the event of a fire, the room located behind it can be used for about 10 minutes to rescue people without the need for respiratory protection. 

In the event of fire or smoke, it is assumed that a door leaf becomes strongly deformed and thereby loses its ability to provide a tight seal. The leak rate of a door during a laboratory test, with a maximum pressure differential of 50Pa and a maximum temperature of 200°C, must not be greater than 20m3/h in the case of single-wing doors and 30m3/h in double-wing doors

Building laws

Building law information

Athmer oHG confirms with the test certificate issued the Materials Testing Institute of North Rhine-Westphalia (MPA NRW) that the NADI® frame sealing system in conjunction with the Schall-Ex® L-15 FS retractable floor seal is suitable for upgrading a fire door based on DIN 18095-2 and DIN EN 1634-3 for smoke doors.

The test certificate serves the responsible expert, the fire protection officer or the responsible building inspection authority as a guarantee of the use of a professional and high-quality sealing system.

Retrofittable sealing systems are not part of the general building approval (abZ) for a door.

For any official approval that may be required, we will provide  you with the test certificate . Please do not hesitate to contact us.