Try some some plasticine. I began using it expeerimentally several years ago because i was getting late season grafting failures. Spring is always busy for me, and i never feel my best just after winter. The oils of wax seeps into the grafting unions ccausing failures due to higher Heat. Plasticine wont bleed into the union aand i had no grafting failures when using it. If anyone wants to know how i use take a peek at this thread. @smsmith is going to love the change. He brought it up above and i apologize for just linking a thread now.