Shoes and boots will both succumb to routine wear and tear. Boot soles can come apart from the rest of the boot as a result of normal wear, weak glue, or a loose threading. In the event that this happens to your boots, you do not need to choose between a costly resoling and throwing your boots out and getting a new pair. You can repair the split between your sole and upper by yourself, and also save money and prolong the life of your boots.
Clean your boots with a damp cloth. Wipe away any dust or dirt from the gap between the upper and the sole.
Apply shoe sole glue to the area inside the gap between the upper and the sole. Make sure to cover the entire surface inside the gap.
Push the upper and sole together and hold it firmly. Wrap duct tape around the boot to keep the sole and upper pressed together firmly while the glue cures. Leave the boot like this for 24 hours.
Remove the duct tape and wear the boot.
If the sole has developed holes in the bottom or has deteriorated, you may have to take the boots to a cobbler to have them resoled or replace them with a new pair.