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The 3M 7010350213 is a multiple-wall, semi-rigid heat shrink tubing designed for reliable wire and cable insulation in electrical and electronics applications. Built from co-extruded, selectively cross-linked polyolefin, it features a 2.5:1 shrink ratio and an integral meltable inner wall that flows on heat activation to seal out moisture and provide strain relief. Each stick measures 48 inches in length and is supplied in the green color designation. Licensed electricians, OEM assemblers, and field service technicians regularly use this tubing where environmental sealing and mechanical protection are required at terminations, splices, and connector backshells.
This tubing is suited for residential and commercial electrical wiring, industrial control panels, automotive harness work, and marine or outdoor installations where moisture ingress is a concern. The meltable inner wall bonds to conductors and connector bodies when heated, creating a low-profile, sealed sleeve. The semi-rigid construction maintains shape after recovery, making it a practical choice for bundle breakouts and strain-relief points on multi-conductor assemblies.
Designed as an OEM-style and field-service replacement heat shrink sleeve for electrical and electronics applications requiring a sealed, multiple-wall polyolefin termination on wire, cable, and connector assemblies.
Installation is performed by electricians, electronics technicians, and harness assemblers using a calibrated heat gun set to the appropriate recovery temperature for polyolefin tubing. De-energize all circuits and verify zero voltage before sleeving any live conductors. Position the tubing centered over the termination or splice before applying heat, and apply heat evenly from the center outward to prevent air entrapment under the inner wall. Avoid open-flame heat sources, as uncontrolled temperatures can scorch the outer wall or prevent proper inner-wall flow.
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