My son works in the nursery industry in Canada and does a lot of budding and grafting. Recently a customer asked him to do some grafting b/c they were not having good success. My son suggested that they would have better success using wax rather than tar to seal the grafts. I ask why are the nurseries not using wound paste and putty. Of course, he said probably cost, but he wondered what was the best product(s) and could it be purchased in larger quantities. I was hoping for the best recommendations for the products and if there is a contact where the items can be purchased in quantities (I know about Amazon and Ebay). Any help would be great. Thanks.