Rockwool FirePro SoftSeal Coated Strip

A FIREPRO® SoftSeal Coated Strip comprises of a low-density stone wool SoftSeal.
Within almost all Construction projects it is essential to ensure fire stopping techniques are used to prevent the spread of fire and smoke throughout a building. The Softseal Coated Strips has been specifically manufactured to accommodate structural movements while also providing excellent fire and acoustical performance properties to walls and floors.

Product Information:
The SoftSeal Coated Strips have a density of 80kg/m3, is coated on both sides, is compliant to EN1366-3 2009 EN 13501-2 and can resistance fire for up to 2 hours.

*Always Refer Back To The Manufactures Specification Document

Download Specification


The ROCKWOOL FIREPRO® SoftSeal System has been developed in response to demand from the market for a firestopping solution where high levels of movement in the building’s services or joints need to be accommodated.

The FIREPRO® SoftSeal System is suitable for applications in penetration seals and linear joint seals.


Part of the ROCKWOOL FIREPRO®range, FIREPRO® SoftSeal System incorporates a product specifically designed to accommodate movement within buildings in linear joint seals and penetration seals.


• Suitable for penetration and linear joints
• Acoustically absorbent
• CE Marked
• Easy to handle and install
• Both vertical and horizontal joint applications
• Tested for durability to current EU guidelines
• Supplied pre-coated


The FIREPRO® SoftSeal System has been specifically developed for two key applications areas.

Penetration seals


As part of the comprehensive ROCKWOOL FIREPRO® range of fire protection products, FIREPRO® SoftSeal System incorporates a product specifically designed to apply to penetration seals within buildings, where the design needs to accommodate movement in the services.

The FIREPRO® SoftSeal System can be installed into apertures within masonry or drywall partitions as a standalone seal for openings up to 1000mm x 1000mm or as part of a larger ROCKWOOL Ablative Coated Batt seal (2 layers) to accommodate movement of services. *

A FIREPRO® SoftSeal Coated Strip comprises a low-density stone wool SoftSeal Lamella Strip, pre-coated with SoftSeal Flexible Coating.

The FIREPRO® SoftSeal Coated Strip is supplied in strips 1200mm x 200mm x 100mm. The FIREPRO® SoftSeal flexible Coating is also available in 5L, 10L and 20L tubs to enable site repairs to FIREPRO® SoftSeal Coated Strips and FIREPRO® SoftSeal Linear Joint Seals, that may have been damaged during installation. To complement the FIREPRO® SoftSeal Coated Strip, ROCKWOOL also supplie.

FIREPRO® SoftSeal High Expansion Intumescent Sealant (310ml) and FIREPRO® SoftSeal Flexible Acoustic Intumescent Sealant (310ml).

FIREPRO® SoftSeal Coated Strip is intended to reinstate the fire resistance, acoustic and air seal performances of concrete floors, masonry walls and dry wall systems when voids have been created for the passage of services.

This includes pipes made of steel, cast iron, copper, polypropylene (PP), high density polythene (HDPE), PVC and ABS along with all sheathed cables up to 80mm and supported cable bundles up to 100mm.

Higher levels of service movement may be accommodated by installing the product under higher compression rates, please contact ROCKWOOL Technical Solutions for guidance.


Fire performance

ROCKWOOL FIREPRO® SoftSeal Coated Strip has been tested to the dedicated fire resistance standard for penetration seals BS EN1366-3 and shown to provide up to 2 hours fire performance (EI20). Standard details, showing the full scope of fire performance, are available from the ROCKWOOL Technical Solutions Team on 01656 862621.

FIREPRO® SoftSeal Coated Strip fire resistance tests were conducted using FIREPRO® SoftSeal Flexible Acoustic Intumescent Sealant and/or FIREPRO® SoftSeal High Expansion Intumescent Sealant.

For vertical applications the FIREPRO® SoftSeal Coated Strips are coated on both sides.


As part of the testing to BS EN 1366-4, FIREPRO® SoftSeal was assessed for its movement capabilities, prior to conducting the fire test. The product was tested to accommodate movement (expansion and contraction) of +/-15%*.

*See ROCKWOOL standard details for specific Ablative Coated Batt sizes.


Property Description
Length 1200mm
Width 200mm
Thickness 100mm
Fire Resistance Up to 2 hours
Coating 2 sides
Density 80Kg/m³
Movement +/- 15%
Acoustic performance

Tested to EN 10140 with the following results.
• Rw 30 dB: When installed with 100mm thick SoftSeal Batt
• Dn,e,w 40 dB: When installed with 100mm thick SoftSeal Batt

Water permeability

Tested to EN 1027 – No leakage observed up to 300Pa.

Air permeability

• Tested to EN 1026 up to 600Pa.
• Leakage at 50Pa – 0.1/1.4 m³/m²/h.

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