renkma You're likely looking at a few days to a week or so, depends on how deep the cut & also if she reopens the wound by hitting her tail on something before it's completely healed
Barkingdog it was most likely a product similar to Liquid Bandage looks & acts like glue to close wounds. In many instances it's more effective than traditional bandages which would easily come off of certain places like active wagging tails, also reduces scarring.