I purchased a bucket (150 feet) of crack stix from a random website ($30?).
All you need is a clean crack, which I pressure washed, and some crack stix, which is wrapped in plastic and you can rip apart in strips.
I pushed in the flexible crack stix and then applied fire. It melts down and in 20 minutes can have traffic.
It actually worked really well. I will have to see how it lasts.