Elmer's No-Wrinkle Rubber Cement, 8 oz.

Pretty much typical of all contact cements that I've used. While the cap has an attached brush, I often find that has too much adhesive stuck on it, especially for a small job, so I have disposable brushes for small applications. Sticks well when properly applied: apply to both sides, wait until dried but still tacky, and press sides together. I had belts to shorten after losing lots of weight, but they had 2 sides sewn together which meant the trimmed end no longer had stitching. The belt would flay apart at the end making it more difficult to thread though the belt loops on pants, but a single application of this glue keeps the halves together to look neat and make easy threading through belt loops. Only problem with buying in a bottle or can is air gets trapped inside eventually congealing (setting) the glue making it unusable after a couple month. Once opened, you need to keep using it up; else, you'll discard a lot of it. For large jobs, the bottle or can is good as is the large brush attached to the cap. For small jobs, I get contact cement in small squeeze tubes. After use, squeeze until the cement is at the tip, and put on the cap to keep out the air. There are stronger adhesives, but many get hard when set and upon further curing. I use contact cement where the mend has to remain flexible.