Originally Posted by
Classtime
I always pump up a newly patched butyl tube and if all seems well, I leave it pumped up and don’t fold it and place it back in a baby-powdered ziplock unless it is still plump the following day.
That is often the reason patches fail. While the patch will adhere to the tube instantly if the vulcanizing fluid is dry, it takes some time for the bond between the tube/patch/vulcanizing fluid to form. Stressing it just after application can cause the bond to fail. Leaving the tube flat for at least a few days will reduce the chances of pulling the patch off the tube.