Urgent: help grafted branch broken
I bought a 4 in 1 grafted apple tree. During high winds, one of the branches broke and was dangling on few fibers. It seems to have broken where it was grafted. I managed to temporarily put duct tape and tie it back to its original position with a stick to support it. Is that enough to save it? If not please suggest me some ideas, preferably home remedies as it might take a while to get grafting supplies. I am new to gardening and newer did any grafting. The broken branch is about a feet long and 7-8 mm thick with some flowers on it.
Thanks so much