SUMITOMO 1″ W5DL DUAL WALL 3:1 TUBING

Description

Sumitomo W5DL 1 Dual-Wall 3:1 Adhesive-Lined Heat Shrink Tubing for Motorsport Wiring

The W5DL-1-0 is Sumitomo W5DL cross-linked polyolefin 3:1 dual-wall adhesive-lined heat shrink tubing in 1 expanded inner diameter (approximately 25.4 mm expanded, recovering to approximately 8.5 mm). Sumitomo W5DL is a professional-grade motorsport and automotive harness heat shrink product that provides the same dual-wall adhesive-lined sealing performance as the Raychem SCL product, offering an alternative supply source at comparable quality for workshops and builders who require dual-wall 3:1 adhesive-lined tubing without specific brand constraints. This diameter suits the largest individual harness bundle end-seals and main connector backshell entries.

Sumitomo W5DL — Dual-Wall Adhesive-Lined 3:1 Construction

Like Raychem SCL, the W5DL uses a cross-linked polyolefin outer wall with a hot-melt adhesive inner lining and a 3:1 shrink ratio. When heat is applied, the outer wall shrinks to conform around the wire or connector while the adhesive melts and flows to create a watertight seal at the application point. The 3:1 shrink ratio accommodates larger pre-shrink diameters than standard 2:1 products, providing greater flexibility for sealing over irregular connector geometries, splice joints on larger-gauge wire, and harness bundle end-seals. Continuous temperature resistance of 135°C makes the W5DL suitable for use in motorsport engine bay environments.

When to Specify W5DL vs Raychem SCL

Raychem SCL and Sumitomo W5DL are functionally equivalent dual-wall 3:1 adhesive-lined products. Raychem is specified by name in certain professional motorsport and aerospace harness standards due to its verified material consistency and quality history; W5DL is the correct alternative when Raychem SCL availability is constrained or when cost management is a consideration without compromising the dual-wall adhesive-lined specification. Both are significantly superior to generic unbranded dual-wall products that may not meet the dimensional or adhesive flow consistency required for reliable motorsport harness sealing.

1 Diameter — Application Range

The 1 W5DL suits the largest individual harness bundle end-seals and main connector backshell entries.

Available from Arctic Performance Parts

Arctic Performance Parts stocks Sumitomo W5DL dual-wall 3:1 heat shrink across 1/8″ to 1″ to support professional motorsport harness builds across Norway, Sweden, and Denmark. Lead time 1–2 weeks for quantities beyond current stock.