Add a nonslip grip to a crowbar using Sugru.
Several packets of Sugru
Step 1: Wrap Spiral of Sugru in One Direction
Knead and roll Sugru into a long strip and wrap it around the end of the crowbar where you'd like a better grip.
Step 2: Wrap Alternating Direction of Sugru
To increase the 'grippyness' wrap a second spiral of Sugru in the opposite direction. To make it look tidy, make the ends of the spirals meet.
Let harden 24 hours. Enjoy!