HP Shrink is extra flexible and has a low shrink threshold making them ideal to seal off any high temperature sleeve! The very flexible polyolefin tubing has a 3:1 shrink ratio and meets all AMS-DTL-23053/5C, UL and CSA specifications. HP Shrink is a great alternative to zip ties, tape, and prove a clean tight seal with a professional look. Sealing the ends of any heat shield sleeve, improves the efficiency and prevents hot air for working its way in between your hose or wire. We offer them in black with yellow logo in diameters of 1/2, 3/4, 1-1/2, and 3 inch to fit whatever you need. Shrink and seal your way to optimize your heat sleeve.