9-Inch NO-Hole PSA Aluminum Oxide Self Stick Sanding Disc, 5 Each of 80 120 180 240 320 400 Grits，30 Pack

I bought these to use on my disc sander on my belt sander. I didn't get it exactly where I wanted it on the disc the first time, so I removed it to re-align it with the disc. Wrong thing to do, as it wouldn't adhere to the disc again once it was removed. I had to throw away an unused sanding disc because it wouldn't stick again, so be sure it's where you want it the first time.

Four stars was only because my order was shorted by 1 disc.They resolved the issue in a timely manner. Thank you so much!

The sandpaper itself is fine. Long lasting and works well on any material. The issue is with the adhesive. Withing 5 minutes of applying the sandpaper to the disk it start to peel off. I tried clamping it overnight but after removing the clamps it peeled off again. So I tried a second time. I cleaned my hands with industrial hand cleaner in case I had oil on my hands and contaminated the PSA when applying the sandpaper to the disk. I also washed the disk off with acetone, twice, in case it might be contaminated. Same results. I never touched either the disk or the back of the sandpaper but it peeled off again. I also did some heavy sanding on a steel bar. Same results, peeling sand paper.

great