Adhesive heat-shrink is definitely a step above it’s simpler cousin. Besides having a higher shrink ratio, the interior is lined with a goo that melts and seals the splice when the tube is heat-shrunk. It makes an impressively water-tight seal.

Features:

NTE’s Dual Wall Heat Shrink Tubing is flexible, polyolefin based heat−shrinkable tubing with a thermoplastic adhesive inner liner which flows when heated (yeah, I said that already. Why are you repeating yourself?). After shrinking and cooling, it provides a permanent flexible water proof barrier.

This tubing is suitable for a wide range of applications, such as encapsulation cables, wires, electrical components and splices. The choice of high shrink ratios means more flexibility of usage such as in the covering of irregular shaped objects.

Specifications:

MIL−DTL−23053/4, Class 3

Technical Data: