1" DUAL WALL

At 1" and above you are typically dealing with cable bundles, conduit terminations, or industrial-grade single conductors. The 3:1 shrink ratio is essential here — it gives enough diameter range to slip over large connectors and ring terminals, then recover down tightly. The adhesive fills the irregular voids between multiple conductors in a bundle, creating a weatherproof end cap that prevents moisture from wicking into the conduit run. For firewall and bulkhead entry points, this seal also provides a degree of flame barrier. Industrial environments with cleaning agents, hydraulic oil, and mechanical vibration demand the bonded construction that dual wall adhesive tubing provides.