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ROCKWOOL External Socket Intumescent Putty Pads are designed for lining electrical socket boxes externally, in most forms of dry wall or plasterboard construction in both commercial and residential buildings. The pads are non-setting and flexible and will not harden, crack or dry out with age. The intumescent properties activate as temperatures reach 200ºC restricting the passage of fire and smoke. They provide a fast, efficient and clean method of achieving the required fire and acoustic ratings as specified in the 2006 edition of the Building Regulations (E&W) Approved Document Part E and Part B, sections 7 and 7.12 b.

They have been developed for use in plasterboard partitions that have been partially penetrated by electrical socket boxes. They are designed to maintain acoustic integrity and fire resistance. They make a significant contribution to the reduction of air leakage in properties.


  • Provides fire protection.
  • Reduces noise transfer.
  • Pre-cut cross shape ensures hassle free installation.
  • Low smoke emission.
  • Maintenance free.
  • Remains malleable.
  • Long service life.

General information




Uniclass 2015

Pr_30_31_68_42 Intumescent puttiesPrimary


P12/350 Intumescent putty

Specification data - Intumescent putties

Product Reference

ROCKWOOL FIREPRO Intumescent Putty Pads







Product Options

Standards and approvals:

Tested to BS 476-20/ EN 1366-3, Acoustic Intumescent Putty Pads offer up to two hours of fire resistance. Measurement of airborne sound insulation was made in accordance with BS EN ISO 140-3. Single number quantities were calculated in accordance with BS EN ISO 717-1. Intumescent Putty Pads (Internal Socket) offer a weighted sound reduction index of up to 67 dB. Tests were conducted by BRE Acoustics who hold UKAS accreditation for the measurement of sound insulation in the field and the laboratory. The measurements were conducted using the procedures accredited by UKAS.