Just for the record, I have researched quite a bit on what to use to repair industrial rubber belts (conveyer belts). The most highly recommended product by the industrial repair community is call REMA SC-2000 Universal Cold Vulcanizing Adhesive. It's about $40 for a quart of the stuff. I was seriously going to consider using this stuff until I read about another success story with the E-6000. Heck for $3.00 maybe it's worth a try.
Frosty
We use the REMA SC-2000 on our torn conveyor belts on our rock crusher. the stuff works like magic!