Spot on. I've seen some jumps that have had carpet put on them overnight after they've been wet down just to hold the moisture in and help it set. I guess it woked because the cracks weren't there for months.....Kitoff said:The best way to fix cracks:
1) Dampen the area lightly
2) Take a broom
3) Sweep all the dry dusty crap that has accumulated at the bottom of the jump up onto the wetted area.
4)Repeat.
5) Stand back and go "Aaaa.....aren't my jumps lovely now that those nasty cracks are all fixed".
Seriously, use the broom it works.