Use a trowel to push the base layer mix inside the gap.
Place the rubber surface back to where it was and use a wear layer patch kit to repair the cut
How to Top Seal your playground rubber flooring
If your playground surface has a lot of dirt and debris lodged within the granules, you might want to power wash it. You need to be very careful with that though. We have seen a lot of surfaces damaged by power washing them. If you have to, use a wide angle, low pressure nozzle.
Let your playground surface dry completely before you top seal it.
Place our Rebinder pail on a tarp or cardboard and open it
We recommend using a thick roller nap to apply the top sealant.
Start at the farthest perimeter of the playground area and work your way out to the exit.
Apply gentle pressure on the roller and try not to roll over the same area twice.