TECH Bias Uni-Seals provide a simple, safe, and permanent method to properly repair 3/4″, 20mm injuries in bias truck, agricultural, industrial, and small OTR tyres. The oversized stem fills the injury while the fabric reinforced cap restores the integrity to the tyre. Both the stem and cap permanently vulcanize to the tyre with TECH’s thick chemical cushion gum. Best used with TECH’s Vulcanizing Fluid, Security Coat, and Bead Sealer.