The best success I have had when regluing leather uppers to plastic soles is when using "Gorilla Glue". I have bought my supply from the local Rite-Aid. Contact info; The Gorilla Glue Company, Cincinnati, Ohio,1-800-966-3458 or _www.gorillaglue.com_ (http://www.gorillaglue.com) . You MUST follow the instructions. Ron Tandy, Westminster, CA. tmyden@aol.com