Everyone has opinions about glue,vulc fluid or whatever. What works for me is the Slime glue, available at Walmart and auto stores. It doesn't seem to dry out. I buy the small 13mm(?) Rema patches, box of 100. I sort of enjoy patching tubes but that seems to be unusual. Most of the folks I ride with don't want to use a patched tube. I like to see how many patches I can put on before the valve fails.