TireFix Tire Repair Sealant TireFix Tire Repair Sealent is engineered for the tool-free emergency repair of tire punctures for all common automobile and caravan tire sizes. It removes reliably and quickly air leaks in pierced tires with a diameter of up to 5 mm by creating a durable vulcanized film. Easy to use - tool-free repair for all common automobile and caravan tire sizes reliably and quickly closes air leaks with a diameter of up to 5 mm