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Fire Rated Putty
Fire rated putty is a key passive fire protection product, designed to help stop the spread of fire, smoke and hot gases through openings in fire-resisting walls, ceilings, or floors. It is especially effective where services - such as cables, conduits, or metal pipes - penetrate compartment walls, providing an easily applied, flexible seal that helps maintain the fire integrity of the structure. Putty products work without the need for external power, offering instant readiness and protection. They are often used around socket boxes, switchgear, and service penetrations in walls, where a firestop solution is essential.
Astroflame Fire Rated Putty Pads & Cords
Easy to apply fire and sound rated sealant supplied as a non-setting putty. The putty is hand workable, reusable and re-serviceable due to its non-setting properties. The putty is manufactured and supplied in different shapes and forms for different applications - sockets, fire sealing services and water supply boxes. CE marked certified...
Quelfire Intumescent & Acoustic Putty Pads
Designed to maintain the fire resistance (up to 2 hours) of plasterboard partitions where they have been penetrated by single or double plastic or metal electric socket boxes. They also make a significant contribution to the reduction of air leakage in properties, helping reduce energy costs and carbon emissions. They can be fitted during...
FSi PenoPatch
Putty based penetration sealing device for small cables and conduits in flexible and rigid walls. Easy installation Up to EI60 fire resistance 2 different size combinations, covering most small openings Note: 60mm size is now discontinued Ideal for Historical Building Upgrades or new build Fire resistance testing to EN 1366-3 60...
FSi Non-Setting Putty Pads
Pre-cut system designed for easy application with single and double electrical sockets back boxes where fire resistance must be upheld in the event of a fire, installed within both flexible and rigid wall systems. The putty is also available in 1KG pails. To reinstate fire resistance through walls Where single and/or double plastic socket...
Protecta FR Putty
Non-setting fire and sound rated putty for reinstating fire barriers. Available in red. Designed for use on electrical sockets, service penetrations, and water supply boxes in dry lining partitions. Provides up to 2 hours of fire resistance, preventing the spread of flames, smoke, and sound. Self-adhesive, easy to apply without tools, and...
SikaSeal-632 Fire Putty+
Fire resistant sealing putty used for restoring the fire resistance performance of a wall or a floor which incorporates small service openings containing cables, insulated and uninsulated metal pipes. Suitable for small gaps around services where sealants cannot be applied to the required depth. Sika now offer a Fire Stopping Solution...
Pyroplex Putty Pads For Electrical Boxes
Pre-cut ablative pads designed to reinstate the fire performance of compartment walls when penetrated by electrical outlets, providing a fast, efficient and clean method of achieving the required fire performance. Tested in accordance with BS EN 1364-1 Can be used in masonry and plasterboard partitions up to 120 minutes fire performance...
Rockwool Intumescent Putty Pads
Manufactured from a red non-setting, flexible silicone based intumescent polymer. They will not harden, crack or dry out with age. The intumescent properties activate as temperatures reach 200°C, restricting the passage of fire and smoke. Developed for use in plasterboard partitions that have been partially penetrated by electrical socket...
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Fire Rated Putty for Sealing Electrical Penetrations and Service Gaps
Where services pass through compartment lines, the risk of smoke and fire spread increases without proper firestopping. Fire rated putty provides a practical, adaptable solution that helps preserve a building’s fire separation by sealing voids around electrical fittings, junction boxes, and service penetrations. These products are essential where full access for other sealing methods is not practical, offering a clean and reworkable solution that supports the passive fire strategy.
Installation of fire rated putties complements certified systems such as door upgrade kits, structural coatings, and board encasement, forming part of a complete fire safety solution. Putties are especially useful in retrofit scenarios or buildings with frequent electrical layout changes, where a durable and flexible firestop is required. When exposed to fire, they help prevent passage of heat and gases, supporting the fire integrity and insulation of the wall or ceiling.
Each fire rated putty must be used strictly in accordance with test evidence and third-party assessments. Correct use depends not only on the putty’s properties but also on the material it is applied to - plasterboard, concrete, or composite walls may each require different specifications. These systems are typically assessed under BS 476 or EN 1366 standards for penetration seals, helping to deliver the fire resistance performance expected under Approved Document B.
Fire Rated Putty FAQs
What is the primary use of fire rated putty in building construction?
It is mainly used to seal electrical socket boxes and small service penetrations in fire-resisting walls and ceilings, helping maintain fire compartmentation.
Can fire rated putty be reused after removal?
Yes, many fire rated putties are designed to be reworkable, making them ideal for retrofit applications or where regular access is required.
Is fire rated putty suitable for use around metal pipes or conduits?
Yes, but only when used in accordance with tested systems that include these specific service types, to ensure fire resistance is maintained.
Does the wall type affect fire rated putty performance?
Yes. The construction type - e.g. plasterboard versus blockwork - can affect how the putty performs, so only use where testing or assessment supports the combination.
Are there any limitations to using fire rated putty?
Yes. It is generally not suitable for large openings or areas subject to high movement unless specifically tested and approved for those conditions.