Nice stuff though, if you have enough surface for it to work. It doesn't like small contact surfaces.
It depends on proportions really, and of course how even the area is. If you put two honed areas together with the stuff, and leave it together for more than a month, you'll be very lucky to get it appart ever again (as honed surfaces have a tendency to cold-weld when they're pressed together over longer periods of time...).
Is that the Mythbusters glue that holds 700lbs with a drop?
700 pounds is no problem, but one drop might be a bit much, depending on how large a drop is... stuff works better the less you use.