Both of BH-2(PMT) and BH-2(PMT)-LS are made by medical grade modified polyolefin, they are peelable heat shrink tubing and mainly application for aids prodcution for catheters,ballons and guide wires, they need to remove after aids production process or before using. Here is peel off process videos for your kind reference.
The differences in the peel off process:
BH-2(PMT) peelable heat shrink tubing needs heat up (Approx. 85ºC) to soften tubing firstly before peel off process.
BH-2(PMT)-LS could be peeled off directly without additional heat and easily after heat shrink process.
peelable heat shrink tubing