What's the best glue to repair a diesel fuel tank leak UK?

For small diesel fuel tank leaks in the UK, high-temperature epoxy resin (like JB Weld) can provide a temporary fix, but replacement is the safest long-term solution.

When dealing with diesel tank leaks, first thoroughly clean and dry the affected area before applying a specialist fuel-resistant epoxy. Popular UK brands like Araldite or JB Weld offer suitable products, but note these are temporary fixes only.

For Land Rover Defenders, Ford Transits or other common UK diesel vehicles, we recommend:

1. Small leaks: Clean area and apply fuel-resistant epoxy as temporary measure
2. Medium leaks: Consider professional plastic welding (for plastic tanks)
3. Large leaks: Full tank replacement is the only safe option

Important safety notes for UK motorists:

• Never attempt to weld a metal diesel tank without professional help due to explosion risk
• Diesel is highly corrosive to standard adhesives
• MOT testers may fail vehicles with repaired fuel tanks
• Consider ULEZ compliance if driving in London

The most reliable solutions are:

1. Professional tank repair (plastic welding for modern vehicles)
2. Complete replacement (recommended for most cases)
3. Temporary epoxy fix (for very minor leaks only)

For common UK vehicles like Vauxhall Astras or Volkswagen Golfs, replacement tanks typically cost £150-£400 plus fitting at a local garage.