I've got an ABUS Bordo Lite folding lock and the holder it came with which attaches to the bicycle's frame using two thin metal strips and/or two Velcro straps is now broken:
As you can see, the soft plastic strap keeping the lock securely in the "holster" tore. Although the lock itself doesn't fall out when keeping the holster open as depicted, it does rattle around a bit and, more importantly, the strap itself is incredibly annoying because it moves around and sometimes tickles my sensitive, powerful-yet-dainty high-performance calves (no, I don't shave them).
- Rubber band: I had tried wrapping a rubber band around the "inside" loop on the upper part of the strap and then wrapping the rubber band around the nub (what is it called?) on the holster itself, but the rubber band becomes more and more slack with time and then itself becomes loose.
- Electrical tape: I tried wrapping electrical tape around the broken loop in order to try to hold the loop together, but it couldn't withstand the stress of the loop being closed around the "nub" on the holster.
- Superglue: I tried supergluing the broken loop back together by letting the glue "set" inside a wrapping of electrical tape, but it didn't hold.
- Kill it with fire: Since some plastics are re-formable, I had tried melting the broken loop with a lighter and then "re-forming" it by holding it together with electrical tape until it re-set. That didn't work at all and simply made it look uglier than before.