Universal String Inserts can easy and fast repair small injuries in tubeless tyres. Unique gray cushion gum flows into the injury and completely seals the innerliner as well as broken cord and cable ends. The insert permanently vulcanizes to the tyre, and the tyre is immediately ready for use. Flow-Seal Inserts are ideal for use in both bias and steel belted radial tyres. These inserts are designed for demounted tyres and are also excellent repairs when used in any retread process. They can be used to fill an injury and are very effective when backed up with the appropriate repair unit. Note:Industry standards state that the tyre should be demounted and repaired from the inside using insert and appropriate repair unit on the innerliner.