Apply Discount Code
NUL20X4X2W
20 X 4mm 1 Hr Plain Intumescent Fire Strip White 2.1m Length
Main image
Click to view image in fullscreen
![]()
2004 White 20 X 4Mm 1 Hr Plain 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
£2.70
Incl. VAT
£2.25
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 Plain Intumescent Fire Strip White 2.1m Length
Ensuring the safety of a building requires meticulous attention to every detail of fire door hardware. Our 20 X 4mm 1 Hr Plain Intumescent Fire Strip White 2.1m Length serves as a vital barrier against the destructive spread of fire and toxic smoke. This product is engineered to provide peace of mind in high-traffic commercial and residential environments where fire safety compliance is non-negotiable.
When fire breaks out, door gaps become dangerous pathways for heat and combustion gases. This professional grade seal activates precisely when needed to seal those gaps and maintain the integrity of your fire door assembly. By choosing this hardware, you are investing in a proven solution that meets stringent industry standards for building safety.
The Science of Fire Protection
At the heart of this product lies an advanced intumescent core made from intercalated graphite. This material is designed to remain dormant throughout the normal life of the door, requiring no maintenance while sitting flush in its rebate. However, the physical reaction triggered by high temperatures is rapid and incredibly effective.
As ambient temperatures rise to the threshold of a fire event, the graphite expands multi-directionally up to 15 times its original volume. This rapid physical transformation exerts the necessary pressure to form a solid, heat-resistant barrier. This mechanism holds the door firmly within its frame and prevents the passage of smoke, keeping escape routes clearer for longer during an emergency.
Technical Specifications
Selecting the correct fire seal dimensions is critical for successful fire safety certification. Please refer to the table below for the technical parameters of this specific model.
| Feature | Specification |
|---|---|
| Width | 20mm |
| Thickness | 4mm |
| Length | 2.1 metres |
| Fire Rating | FD30 and FD60 (60 minutes) |
| Expansion Ratio | Up to 15 times original size |
| Material | Mineral based graphite core |
| Colour | White |
| Certification | Certifire approved CF846 |
| Adhesive | Self-adhesive backing |
Mechanical Performance and Structural Integrity
The structural composition of this seal is designed to withstand the harsh conditions found within a fire scenario. Unlike inferior products that may degrade over time due to environmental factors, this item is formulated to resist moisture, humidity, and atmospheric pollutants. This high level of chemical stability ensures that the intumescent material remains ready for action for many years.
During the manufacturing process, we ensure that the seal provides consistent density throughout its 2.1 metre length. This uniformity is crucial for ensuring that expansion is even across the entire perimeter of the door. When the material expands, it generates the specific pressure required to counteract the thermal warping that often occurs in doors during exposure to extreme heat. This prevents the door from bowing out of the frame.
Workflow and Installation Guidance
Achieving a compliant installation is a straightforward process when following the correct steps. First, ensure you have routed a rebate that perfectly matches the 20mm by 4mm dimensions of the seal. A loose fit can compromise performance, while a tight fit might damage the door casing.
After routing the rebate, clean the surface thoroughly to remove all dust, wood shavings, and grease. Any debris left in the channel can prevent the self-adhesive backing from achieving a strong bond. Measure your lengths carefully before cutting the strip to size using a sharp hacksaw or a high-quality blade.
Once the seal is cut, peel away the protective backing strip and press the seal firmly into the rebate. It is important that the seal does not protrude beyond the surface of the door or frame, as this can affect the closing latch or the aesthetics of the finished unit. Apply pressure along the entire length to ensure the adhesive takes hold securely.
Safety Compliance and Regulatory Standards
Operating a facility requires adherence to strict fire safety regulations. By installing this product, you align your premises with the standards required by British building codes, including BS 476 part 22 and BS 476 part 31.1. These tests prove that the hardware maintains its functional integrity under simulated fire conditions.
Using certified components like this fire strip is a standard requirement for fire door inspectors. The presence of clear identification and full traceability on each product makes the audit process much simpler. This level of transparency protects facility managers and building owners by demonstrating that due diligence has been exercised in selecting life-safety hardware.
Commercial Value and Long Term Reliability
Investing in high-quality intumescent seals is a smart financial decision for any commercial property portfolio. Frequent replacement of inferior seals creates unnecessary administrative and labour costs. Because this product has a laboratory-tested life expectancy of over 100 years, it represents a 'fit and forget' solution that minimises maintenance cycles.
Beyond the cost of the hardware itself, consider the value of the assets you are protecting. Preventing the spread of smoke and fire damage can mean the difference between minor repairs and a total loss of property. This 20 X 4mm seal is an affordable yet essential layer of protection that reduces the risk of catastrophic failure during a fire incident.
Important Installation Note: Always consult the original door manufacturer documentation before fitting any intumescent hardware. Fire door certification is strictly linked to specific seal types. If you are not sure if this fire seal is right for your requirements please contact our friendly team today.
Versatility Across Fire Door Types
This model is highly versatile and suitable for both single and double leaf door configurations. Whether you are refurbishing an older building or fitting out a new commercial space, the performance characteristics of this strip make it an ideal choice for FD30 and FD60 fire doors. Its slim profile ensures it remains unobtrusive while providing maximum protection against the hidden threats of fire and smoke.
The mineral-based composition makes this product safe to handle during installation. It contains no harmful fibrous materials, which is a significant benefit for onsite workers. The lack of toxic chemicals ensures that the installation process is safe and compliant with modern occupational health guidelines.
In conclusion, choosing this 20 X 4mm fire strip provides the perfect balance of ease of installation, regulatory compliance, and long-term durability. Protect your building, your staff, and your visitors by ensuring your fire doors are equipped with the best possible intumescent technology available. We are here to support your procurement needs with professional advice and high-quality hardware solutions.
Specification
| Manufacturer | Firestop |
|---|---|
| Finish | White |