23,700
Residential building fires
Estimated U.S. residential building fires caused by electrical malfunction in 2023.
U.S. Fire Administration · 2023 data ↗APPLICATION / FIREXNULL
Supplemental Fire Suppression for Wire Connections and Terminals
Loose or overheated wire connections and terminations can create localized electrical fire risks. FXN Tape offers passive supplemental fire suppression for compatible connection points.
FireXNull products are designed as supplemental protection, not as substitutes for code-required fire protection systems. Review technical documentation and confirm fit for the application.
IN SHORT
Passive Fire Suppression at the Connection Point.
FXN Tape adds passive, heat-activated fire suppression directly at compatible electrical connection points, including wire junctions, terminals, terminal blocks and bus connectors inside enclosed or semi-enclosed equipment. The adhesive-backed tape is cut to length and wrapped around the connection, and releases FK-5-1-12 clean agent at 248°F ± 9°F (120°C ± 5°C). It needs no power or wiring. It does not repair faulty connections and does not replace electrical maintenance, insulation or circuit protection.
01 / THE CONTEXT
Electrical Malfunctions Still Start Thousands of Fires a Year.
Electrical malfunction remains a steady cause of building fires in both homes and commercial and industrial buildings.
7,400
Nonresidential building fires
Estimated U.S. nonresidential building fires caused by electrical malfunction in 2023.
U.S. Fire Administration · 2023 data ↗$1.86B
Combined direct dollar loss
Combined residential ($1.50 billion) and nonresidential ($354.4 million) direct dollar loss from electrical malfunction fires in 2023.
U.S. Fire Administration · 2023 data ↗Context: these figures cover all U.S. building fires attributed to electrical malfunction, not only fires that start at wire connections. They do not measure how FXN Tape would perform in any specific installation.
02 / LOCALIZED ELECTRICAL RISKS
Localized Protection at Electrical Connection Points.
A loose, corroded or poorly terminated connection adds resistance, and resistance under load produces heat. That heat builds at the connection itself, which is where FXN Tape places the agent.
- Terminal blocks and wire junctionsInside control panels, enclosures and equipment.
- Bus connectors and distribution pointsCompatible connection points in power distribution equipment.
- PCB wiring interfaces and harness terminationsIn OEM electrical assemblies and power electronics.
- Connections in EV charging and energy storage enclosuresSubject to component and installation review.
- Open-air or exposed wiringNot intended. FXN Tape is for connections inside enclosed or semi-enclosed equipment.
03 / AN ADDED LAYER OF PROTECTION
Protection Wrapped Around the Connection.
Because FXN Tape sits on the connection itself, the agent is released at the protected connection point rather than distributed across the enclosure.
Where It Fits in Connection Safety
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| Layer | Scope | How it works | Role |
|---|---|---|---|
| Correct termination | Each connection | Installation to the device manufacturer's instructions, including specified torque | Reduces loose-connection risk at the source |
| Inspection and thermal imaging | Equipment and connections | Periodic checks find hot spots and degraded connections | Catches problems before failure |
| Circuit protection | Circuits | Breakers, fuses and protective devices respond to overcurrent and faults | Interrupts many electrical faults |
| FXN Tape | One compatible connection point | Heat at the tape reaches its activation temperature | Supplemental, localized layer at the connection |
FXN Tape does not send an alarm signal and does not replace any of these layers.
FXN Tape
Cuttable, adhesive-backed tape for compatible wire connections, terminals and bus connectors.
Explore FXN Tape →FXN Rope
When a larger enclosure needs distributed protection, evaluate FXN Rope sized by enclosure volume.
Explore FXN Rope →FXN Sticker
When a smaller enclosure needs protection, evaluate an FXN Sticker sized by enclosure volume.
Explore FXN Stickers →04 / FXN TAPE SPECIFICATIONS
Models and Key Specifications.
Reference values from the current FXN Tape Technical Data Sheet.
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| Model | Width | Length |
|---|---|---|
| FXN-T15 | 0.6 in (15 mm) | 3.3 ft (1.0 m) |
| FXN-T15L | 0.6 in (15 mm) | 32.8 ft (10.0 m) |
| FXN-T25 | 1.0 in (25 mm) | 3.3 ft (1.0 m) |
| FXN-T25L | 1.0 in (25 mm) | 32.8 ft (10.0 m) |
| FXN-T50 | 2.0 in (50 mm) | 3.3 ft (1.0 m) |
| FXN-T50L | 2.0 in (50 mm) | 32.8 ft (10.0 m) |
| FXN-T100 | 4.0 in (100 mm) | 3.3 ft (1.0 m) |
| FXN-T100L | 4.0 in (100 mm) | 32.8 ft (10.0 m) |
FXN-T25 is available online. Contact FireXNull for availability of other sizes and custom OEM widths and lengths.
| Property | Specification |
|---|---|
| Activation temperature | 248°F ± 9°F (120°C ± 5°C) |
| Thickness | 0.016-0.017 in (0.40-0.44 mm) |
| Adhesive | Pressure-sensitive adhesive backing |
| Installation | Cut to length and wrap firmly around the connection with overlapping turns. Standard electrical insulation tape may be applied over FXN Tape where additional dielectric protection is required |
| Operating environment | Connections inside enclosed or semi-enclosed equipment. Sustained ambient at or below 149°F (65°C), up to 80% RH, non-condensing |
| Service life | Single use; replace after any activation. Recommended replacement 5 years after installation, with periodic visual inspection |
Source: TDS-FXN-TPE-001-US V3.6 (August 2026). Last updated October 2026.
05 / THE CLEAN AGENT
Why a Clean Agent at Electrical Connections.
FXN Tape uses microencapsulated FK-5-1-12, an electrically non-conductive clean agent that evaporates without leaving a residue. When heat at the wrapped connection reaches the activation temperature, the capsules release the agent directly at the connection. No wiring, power supply or detection hardware is required.
After any fire event, equipment should be inspected by qualified personnel and the underlying electrical problem corrected before returning to service. How the technology works →
06 / BEFORE YOU INSTALL
Fix the Connection First, Then Protect It.
FXN Tape is not a repair. Before applying it, confirm:
- Loose, damaged or faulty connections have been corrected by qualified personnel.
- The circuit and equipment are de-energized and verified, following applicable lockout/tagout procedures.
- The connection is inside enclosed or semi-enclosed equipment.
- The connection surfaces are clean, dry and free of oil and dust.
- Required electrical ratings, clearances and accessibility are maintained after wrapping.
07 / COMMON QUESTIONS
Common Questions.
Does FXN Tape repair a loose or damaged connection?
No. FXN Tape provides supplemental suppression only. Faulty wiring and loose connections must be corrected by qualified personnel.
Is FXN Tape electrical insulation?
No. It is not a substitute for correctly rated electrical insulation. Standard electrical insulation tape may be applied over FXN Tape where additional dielectric protection is required.
Can it be used on exposed wiring in open air?
No. FXN Tape is intended for connection points inside enclosed or semi-enclosed equipment.
Can I cut it to size?
Yes. Trim it to length with standard scissors or a utility knife to match the wire diameter and connection geometry.
Does it need power, wiring or a connection to the fire alarm panel?
No. Activation is passive and triggered by heat at the product. Because it is not connected to a fire alarm system, it does not send an alarm signal or notification.
Is the agent electrically conductive?
No. FK-5-1-12 is an electrically non-conductive clean agent. For the electrical properties of each finished product, installation clearances and placement, refer to that product's Technical Data Sheet and the equipment manufacturer's instructions.
How often are products inspected or replaced?
Inspect periodically for secure mounting, damage or obstruction. The recommended replacement is 5 years after installation, or immediately after any activation. These intervals are maintenance guidance, not a performance guarantee.
Are FireXNull products UL Listed or FM Approved?
No. FireXNull products are not UL Listed or FM Approved as fire suppression products. The UL Recognized Component Material reference applies only to the FXN Tape component material (FXN-15L acrylate sheet, HB flammability classification), not to fire suppression performance.
How do we choose the right width?
Match the width to the connection geometry so the tape fully covers the connection with overlapping turns. Share the connection type and size and our team will recommend a model.
FXN Tape is supplemental protection. It is not a replacement for correctly rated electrical insulation, electrical maintenance, circuit protection or required fire protection.
Related applications: Industrial Control Panels & Switchgear · Data Center Electrical Enclosures · Outlet and Switch Boxes · FAQ · Safety Data Sheets
Evaluate FXN Tape for Your Connections
Share your connection type and equipment details for an engineering review, or request the current Technical Data Sheet and Safety Data Sheet.