Lac Balsam is a premium European wound sealing product made from natural tree resin. This is simply the best solution for sealing those irregular wounds caused by such things as rabbits, mice, ice storms and string trimmers. It also works reasonably well as a grafting wax. We have been using Lac Balsam around the nursery for as long as we can remember... and we're super super happy with this stuff. A little bit goes a long way too; one of these 200mL tubes will last a long time for the backyard orchardist.