SONAX Radiator sealant

Seals hairline cracks or small holes in all radiator systems. Also suitable for crossflow systems with reduced amounts of coolant.

Article Number: 04421410
Contents: 250 ml
Back to product finder

Additional product information:


  • Seals damaged and untight radiators and tubes
  • Can also be used preventatively to prolong the life of the entire radiator system.
  • Also suitable for cross-flow radiators
  • Does not attack plastics, seals and metals in radiator systems.