Poor seal
"Had my Kentrek put a new sole on my mountain extreme boots, after a 7 day deer hunts in the Gila the side boot guard started to delaminate. Kentrek suggested using the aqua seal. It held on a few days and separated again. Only plus per the instructions it said can be used on the heel of the boot to rebuild the height of the heel sole. It has held very well . A back injury causes me to drag my heels and this stuff works well to fix that worn down heel."