These kits come with a small tube of "rubber cement." This isn't actually glue; it’s a chemical agent that melts the patch and the tube together into a single, seamless piece of rubber. Once cured, the patch is often stronger than the rest of the tube. How to Patch a Tube in 5 Steps
These are essentially heavy-duty stickers. They are incredibly convenient and fast, but they are generally considered temporary. Over time, the adhesive can dry out or peel, so they are best used to get you home. Bicycle Inner Tube Patches
Here is everything you need to know about bicycle inner tube patches. The Two Types of Patches These kits come with a small tube of "rubber cement
The cut is a long "snake bite" (two parallel slits caused by hitting a curb). The tube is already covered in more than 3–4 patches. They are incredibly convenient and fast, but they
Pump some air into the tube. Listen for a hiss or feel for airflow. If you’re at home, submerge the tube in water; a stream of bubbles will pinpoint even the tiniest "slow leak."
Before putting the tube back in, run your fingers carefully along the inside of your tire. If the thorn, glass, or wire that caused the flat is still stuck in the tire, it will pop your newly patched tube instantly. When to Toss the Tube