MVSS 302 RW-2051. LSTT Heat Shrink Tubing. LSTT is a highly flexible, heat-shrinkable tubing. Its low shrink temperature offers exceptionally fast recovery for maximum efficiency in high volume commercial applications and makes it suitable for use on or near delicate, temperature-sensitive materials, such as PVC jacketed wire and cable.. Key Features ; Rapid recovery at low temperatures ; Flexible ; Ideal for heat sensitive applications ; 2:1 shrink ratio ; Excellent physical & electrical performance. Applications ; Electrical termination insulation ; Colour coding ; Covering of heat sensitive devices ; Cosmetic coverings ; Mechanical protection