Needed some heat shrink for a large job and needed it quickly. Purchased this and as soon as it arrived I went to work. The glue adhesive doesn’t stick at all. In turn makes the heat shrink not stick. If you press down on the shrink, it pops right out. Other 3:1 shrink I’ve used gets some what hard, these are in between, I thought these were the same ones I purchased several months ago but they definitely are not the same. If you need good adhesion, stay away