Genuine Tech brand Seal-It brown tyre repair string refill pack for our Brown Tyre Repair Cord 'Cab-Kit'. The cord is designed for tubeless puncture repairs in heavy tyres without removing them from the rim. It is widely used by tyre breakdown companies and truck and plant operators for whom machine downtime can be very costly. To comply with British Standard BSau159, it should be considered a temporary repair when used on road going vehicles. However, the cord can be left in the tyre as an injury filler, to be followed up by a reinforced patch repair as soon as is convenient. Use in conjunction with Tech vulcanising fluid or Tech heavy duty blue cement to aid insertion and sealing of the puncture, apply to tyre with Pistol Grip Split Eye Needle Tool or Chrome T-Handle Heavy Duty Split Eye Needle Tool.