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About Knauf Putty Pads

Knauf Putty Pads

Knauf Putty Pads

Knauf (FR) Putty Pads are an easy to apply fire and sound rated sealant supplied as a non-setting putty. The pad is hand workable, re-useable and re-serviceable due to its non-setting properties.

When electrical sockets and switches are installed in dry lining partitions, the original fire rating of the partition is compromised. Fitting Knauf (FR) Putty Pads will reinstate the fire rating of the partition for up to two hours (depending on the partition fire rating) and prevent the passage of smoke and flames in a fire, and sound and air movement during service life, through the electrical socket, into the cavity.

Knauf FR Putty Pads are shaped for use on both single double electrical sockets installations in dry lining walls. The pads are supplied in a cross shape for internal installation in a socket.

Fields of Application

All surfaces must be clean and sound, free from dirt, grease and other contamination. Then remove the backing paper from one side of the pad and for:

Internal Fixing: insert the pad into the socket back box so that the pad completely covers the back and sides. Make a slit to allow the wires to pass through the pad.

Knauf FR Putty Pads are suitable for sealing:
  • Single Socket Internal (Rectangle) 170 x 170mm
  • Double/Single Internal (Cross Shape) 230 x 170mm


  • Can be used for all drylining applications
  • Ready to use
  • No special tools for application Solvent free (no VOC)
  • Halogen Free
  • Compatible with most building materials
  • Non setting
  • Non slumping
  • Unaffected by moisture
  • Reserviceable
  • 120 minutes fire resistance in 100mm and 130mm dry lining. EN 1366-3:2004
  • Low pressure intumescence
  • Cold smoke seal
  • Sound insulating BS EN ISO 140-3:1995

Sound Insulation

Knauf FR Putty Pads have been tested according to BS EN ISO 140-3:1995.
Usage of any backing material is optional, due to the tests being conducted with Knauf FR Putty Pads only.
Result: 67 (-2;-7)Rw (C;Ctr) (dB) Calculated to BS EN ISO 717-1:1997

Fire Classification

Knauf FR Putty pads has been tested in accordance with EN1366-3:2004.
Up to 120 minutes fire resistance in 100mm and 130mm gypsum boards dry walls.


Knauf FR Putty Pads are not recommended for application on bituminous surfaces or substrates that can exude oils, plasticizers or solvents. Knauf FR Putty Pads are not recommended for underwater applications.
Store between +5ºC and +25ºC in cool dry conditions.


Knauf FR Putty Pads are supplied ready to fit in boxes of 20. One pad required per socket box.

Brochures for Knauf Putty Pads

Brochures for Knauf Putty Pads
Preview Description Format Size Open
Knauf Putty Pads Datasheet
PDF 1.5 MB Open

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