AS23053/4, formerly M23053/4, is a semi-rigid, flame retardant, heat shrinkable polyolefin, dual-wall sleeving with a crosslinked outer wall. This moisture proof sealant lining provides a strong protective outer shrink jacket with meltable inner wall. 23053/4 features a 3:1 shrink ratio and continuous operating temperature range of -67 TO +230 °F (-55 TO +110 °C). 23053/4 dual-wall polyolefin sleeving is used in one-step potting, encapsulating, or moisture sealing of electrical components.