How do you make cold patch asphalt hard?

To make cold patch asphalt hard, first ensure the surface is clean and free of debris. Apply the cold patch material, compacting it firmly using a tamper or roller to eliminate air pockets and ensure good adhesion. For optimal results, it can be beneficial to slightly moisten the patch before compacting, as this can help with curing. Finally, allow the patch to cure for at least a few hours before subjecting it to traffic.