Switchgear | Circuit Breakers | Gas-Insulated Equipment | Substations
Belzona SF6-FIX
Seal SF₆ gas leaks to undetectable levels — applied online, no shutdown required, completed in a single day.
The Most Potent Greenhouse Gas
Sulphur hexafluoride (SF₆) is used throughout the power industry to insulate high-voltage equipment in substations, switchgear, and circuit breakers. Its exceptional dielectric properties make it ideal for safely managing electrical currents — but SF₆ has a global warming potential 23,500 times greater than CO₂, making it the most potent greenhouse gas on the planet.
Leak detection surveys show approximately 10% of circuit breaker populations leak, and 85% of those leaks are significant enough to require action. With increasing regulatory pressure from F-Gas regulations in the EU and similar requirements worldwide, power companies face mounting pressure to detect, report, and eliminate SF₆ emissions.
Traditional repair methods require equipment shutdown, gas evacuation, and extended downtime. Belzona SF6-FIX changes that — sealing leaks while equipment remains online, with repairs completed in a single day and leak rates reduced to undetectable levels.
Award-Winning Innovation
Belzona SF6-FIX won the BCF Sustainable Innovation Award and was selected as a finalist for the prestigious IChemE Global Awards. This recognition reflects Belzona's commitment to developing solutions that address critical environmental challenges while supporting efficient power grid operations.
"SF₆ leaks are a significant contributor to global warming, so we set out to create a solution that could safely and reliably prevent these emissions while also supporting the sustainable and efficient operation of power grids."
— Phil Robinson, Key Developer of Belzona SF6-FIX
How It Works
Belzona SF6-FIX is a multi-layer composite repair system that seals SF₆ leaks from the outside while equipment remains energized. The system uses Belzona 7311 adhesive, reinforcement tape, and SuperWrap II composite to create a durable, pressure-retaining seal.
- 1Surface prep — Degrease and mechanically roughen to SSPC-SP 11
- 2Install breather — Allows pressure equalization during cure
- 3Apply Belzona 7311 — Encapsulate with reinforcement tape
- 4SuperWrap II layer — Composite wrap for pressure retention
- 5Second coat and cap — Full encapsulation and UV protection
Key Benefits
- Online application — no equipment shutdown
- Completed in a single day
- Reduces leaks to undetectable levels
- Removable for future joint access
- 100% solids, cold-applied
- Excellent corrosion protection
Why Traditional Repairs Fall Short
- Require complete equipment shutdown
- Gas evacuation and handling costs
- Extended downtime — days or weeks
- Grid reliability concerns during outage
The Environmental Stakes
23,500x
Global warming potential vs CO₂
SF₆ is the most potent greenhouse gas according to the IPCC
10%
Circuit breakers that leak
EPA leak detection surveys show significant leak rates across populations
85%
Of leaks are significant
Releasing enough SF₆ to require regulatory action
EU F-Gas Regulation (2024/573) and similar worldwide regulations require operators to monitor, report, and minimize SF₆ emissions.
Applications
Gas-Insulated Switchgear
Seal flange leaks and housing joints in GIS installations without removing equipment from service.
SF₆ Circuit Breakers
Repair leaking breakers in substations while maintaining grid reliability and avoiding outages.
Disconnectors
Address leaks at joints and seals in high-voltage disconnector equipment.
Pressurized SF₆ Systems
Any pressurized SF₆ equipment where leak repair without shutdown is required.
Industries Using SF6-FIX
Power Generation
Generator circuit breakers, station switchgear, and step-up transformer protection systems.
Oil and Gas
Refinery substations, offshore platform switchgear, and compressor station electrical systems.
Facilities
Plant substations, motor control switchgear, and high-voltage distribution equipment.
Mining
Mine site substations, dragline switchgear, and processing plant electrical systems.
Pulp and Paper
Mill substations, motor drive switchgear, and cogeneration plant electrical systems.
Water and Wastewater
Pump station switchgear, treatment plant substations, and distribution system electrical equipment.
Frequently Asked Questions
What are the main causes of SF₆ leaks?
SF₆ leaks typically occur at flange connections, gasket seals, and housing joints due to aging seals, thermal cycling, vibration, and corrosion. Even small imperfections can allow this lightweight gas to escape over time.
What are the risks of SF₆ leaks?
Beyond the severe environmental impact (23,500x CO₂ warming potential), SF₆ leaks reduce equipment insulation performance, can trigger regulatory penalties under F-Gas regulations, and represent ongoing gas replacement costs.
How does Belzona SF6-FIX address SF₆ leak challenges?
SF6-FIX creates a composite seal from the outside that encapsulates the leak point. The breather system allows pressure equalization during cure, and the multi-layer composite provides durable, long-term pressure retention.
Can SF₆ leak repairs be made without equipment shutdown?
Yes. SF6-FIX is designed for online application while equipment remains energized. This eliminates the need for grid outages, gas evacuation, and extended downtime associated with traditional repair methods.
How do you detect SF₆ leaks?
SF₆ leaks are typically detected using specialized gas analyzers, infrared cameras, or electronic leak detectors. Regular monitoring is required under F-Gas regulations. Once a leak is identified and located, SF6-FIX can seal it without taking equipment offline.
How much does SF₆ leak repair cost?
Cost depends on leak location, equipment type, and accessibility. However, SF6-FIX typically costs a fraction of traditional repair methods when you factor in avoided downtime, gas evacuation, and grid reliability impacts. Contact us for a specific assessment.
Can you repair SF₆ leaks while equipment is energized?
Yes. This is the primary advantage of SF6-FIX. The system is applied externally to seal leaks while switchgear and circuit breakers remain in service, maintaining grid reliability and avoiding costly outages.
How do you fix a leaking SF₆ circuit breaker?
With SF6-FIX, the leak area is prepared, a breather system installed, then layers of Belzona 7311 adhesive, reinforcement tape, and SuperWrap II composite are applied to create a pressure-retaining seal. The repair is completed in a single day without shutdown.
SF₆ Leak Problem?
Describe your equipment and leak situation. We supply Belzona SF6-FIX and coordinate trained application for power utilities and industrial facilities throughout Washington, Oregon, Alaska, and Northern Idaho.
Belzona Technology Northwest is the exclusive authorized Belzona distributor for Washington, Oregon, Alaska, and Northern Idaho. SF₆ leak repair, switchgear maintenance solutions, and technical support for power utilities throughout the Pacific Northwest.