HellermannTyton Heat Shrink Heatshrink + adhesive 612800 - HellermannTyton 323-50630, The HellermannTyton 323-50630 heatshrink tubing features a 4:1 shrinkage ratio and includes adhesive for a robust, waterproof seal. This flexible and abrasion-proof tubing is ideal for protecting wires and cables in harsh environments. Common applications include automotive, marine, and electrical installations requiring a durable and secure connection. HellermannTyton 323-50630 Heatshrink adhesive black 1m shrinkage 4:1