3M 3M Heat Shrink Thin-Wall Flexible Polyolefin Adhesive-Lined Tubing EPS300-1/2-48"-Clear. EPS-300 Heat Shrink Tubing is a dual-wall tubing provides the advantage of an integral, adhesive-lined construction. This flame-retardant tubing with a 3:1 shrink ratio offers insulation for 600V-rated applications. The flexible polyolefin construction features an internal layer of thermoplastic adhesive, which offers moisture-seal protection in automotive and marine applications.