Apply Discount Code
NOR-204FSB-INTUMES
20 X 4mm 1 Hr Smoke Seal Intumescent Fire Strip Brown 2.1m Length
Main image
Click to view image in fullscreen
![]()
2004 Ss Brown 20 X 4Mm 1 Hr Smoke Seal Intumescent Strip 2.1M Length
In stock
Delivery Information
| Delivery Time Frame | Delivery Information |
| Next Working Day By 1PM | When an order is placed by 3pm for next working day on certain items |
| Standard Delivery | Usually delivered in 2 to 4 working days |
| Delivery Charges | |
| UK Mainland | Prices start at £3.95 for very small items, £6.50 for small, £9.50 for medium and £20 for large/long items |
| Scottish Highlands & Islands, Northern Ireland & Ireland | Prices from £30, please see our delivery page for more info. |
View Delivery Information
£3.12
Incl. VAT
£2.60
Excl. VAT
Incl. VAT
Excl. VAT
Incl. VAT
Excl. VAT
Price is for/per each
-
+
-
Buy 100 +save 10%
-
Buy 200 +save 20%
-
Buy 300 +save 30%
Description
20 X 4mm 1 Hr Smoke Seal Intumescent Fire Strip Brown 2.1m Length
Ensuring the structural integrity of a building during a fire emergency requires precision components that act without hesitation. This high-performance door seal provides a critical line of defence by bridging the gap between a fire door and its frame. In the event of a fire, this material prevents the rapid migration of toxic smoke and superheated gases, which are often more dangerous than the fire itself.
Designed for professional installers and safety-conscious property managers, this item remains dormant for years. It requires zero maintenance while standing ready to deploy instantly when temperatures reach the threshold. By choosing this hardware, you are investing in a proven, laboratory-tested solution that prioritises life safety and regulatory compliance.
Mechanical Physics and Expansion Mechanics
At the heart of this product lies an advanced intumescent core crafted from intercalated graphite. When exposed to the intense thermal radiation of an active fire, the graphite reacts through rapid expansion. This process allows the core to swell up to fifteen times its original physical volume, exerting significant pressure that seals every micro-gap around the door perimeter.
The expansion is multi-directional, ensuring that the seal creates a rigid, non-combustible barrier. This barrier is essential for maintaining the integrity of fire-rated assemblies. By filling the void, the seal effectively locks the door leaf into its frame, preventing the warping caused by heat and ensuring that the fire cannot find an easy route through gaps that would otherwise compromise the structural fire rating of the door system.
Step-by-Step Operational Workflow for Installation
Achieving the maximum safety benefit requires a careful and precise installation process. Installers should begin by identifying the rebate size and cleaning the area thoroughly to remove all dust, oils, or loose paint fragments. A clean surface is paramount for the self-adhesive backing to form a permanent bond with the timber or composite substrate.
Measure the height of the door frame or the door leaf carefully, allowing for a tight fit at the corners to ensure continuous protection. Using a sharp blade or a fine-toothed hacksaw, cut the seal to the exact required length. Ensure that the piece sits flush within the rebate, as it must never stand proud of the surface. If the seal stands out, it could impede the closing mechanism of the door, potentially causing mechanical wear or preventing the latch from engaging correctly. Once the backing strip is peeled away, press the seal firmly into the groove, applying even pressure along the entire length to activate the adhesive properties.
Ergonomic Health, Safety and Compliance
Safety in a commercial or residential environment depends on the quality of hardware installed. This model is engineered to be entirely safe to handle throughout the installation process. Unlike older fire-protection technologies, this seal contains no fibrous materials or hazardous chemicals, significantly reducing the risk of respiratory irritation or skin contact issues for site workers.
Compliance with fire safety regulations is simplified through the use of this component. Because it holds Certifire approval and has been tested against rigorous standards like BS 476, facility managers can demonstrate that they have used appropriate materials to meet building control requirements. By opting for this high-quality product, you reduce the likelihood of operational errors during door maintenance and provide a safer environment for building occupants by effectively containing smoke spread.
Commercial ROI and Long Term Value
Investing in superior passive fire protection is a cost-effective strategy for any building owner. The durability of the materials used in this 20 X 4mm 1 Hr Smoke Seal Intumescent Fire Strip Brown 2.1m Length means that replacement cycles are kept to an absolute minimum. Laboratory testing suggests a lifespan in excess of 100 years under normal conditions, meaning this hardware will likely outlast the door set itself.
By protecting your assets from the catastrophic damage associated with smoke and fire infiltration, you effectively mitigate potential insurance losses and costly remedial work. Furthermore, the ease of application reduces the man-hours required for initial fitting and subsequent maintenance checks. This efficiency translates to lower long-term overheads and consistent performance that protects your investment year after year.
Technical Specifications
| Feature | Specification |
|---|---|
| Fire Rating | 60 Minutes |
| Seal Dimensions | 20mm x 4mm |
| Length | 2.1 Metres |
| Brush Pile Height | 5.5mm |
| Material Core | Intercalated Graphite |
| Expansion Factor | 10 to 15 times original size |
| Adhesive | High-tack self-adhesive backing |
| Compliance | BS 476 Part 22 & 31.1 |
| Approval | Certifire CF846 |
Key Application Uses
- This hardware is perfectly suited for use on both single and double leaf fire door configurations.
- The item is fully compatible with established FD30 and FD60 fire door standards.
- It provides a robust dual-action barrier that protects against both heat and smoke intrusion.
- The design is resistant to the effects of high humidity, moisture, and common industrial chemical substances.
- Each length features specific identification markings to ensure full traceability throughout the product lifecycle.
IMPORTANT Please note that you must fit the correct size intumescent seal as per the specific door manufacturer instructions. Our team is available to assist if you have questions regarding the compatibility of this seal with your current fire door setup. Please contact our friendly team at https://www.doorfit.co.uk/architectural-hardware/contact to discuss your requirements today.
Why Our Quality Standards Matter
The manufacturing process for this 20 X 4mm 1 Hr Smoke Seal Intumescent Fire Strip Brown 2.1m Length is strictly controlled to ensure consistency. By utilising high-quality polypropylene for the brush pile, we ensure that the seal remains effective against draughts and light smoke leakage without losing its form. The mineral-based core is unaffected by atmospheric pollution, ensuring that even in harsh urban environments, the safety mechanism remains functional.
When you choose this component, you are choosing a product that has undergone rigorous testing against British standards. Certifire approval, specifically regarding technical schedules TS35 and TS21, confirms that this product meets the highest industry expectations for reliability. Proper fire door maintenance is a statutory requirement in many commercial settings, and using approved components ensures that your fire safety documentation remains valid during inspections.
Finally, we encourage all clients to treat their fire safety hardware with the gravity it deserves. Proper installation by a trained professional will that the 20 X 4mm 1 Hr Smoke Seal Intumescent Fire Strip Brown 2.1m Length performs as designed under the extreme stress of a fire event. Should you have any uncertainty regarding the application, please do not hesitate to reach out for professional guidance to ensure that your building remains secure and compliant with the latest regulations.
Specification
| Manufacturer | Firestop |
|---|---|
| Finish | Brown |