Learn how to repair a small damaged area on your board. This will work for your Windsurfing, Kite surfing, SUP, Wing board EXT... I used JB Weld and carbon fiber for reinforcement. If the damage was a bit larger I would use 2 to 4 circles of carbon fiber with resin epoxy and a mix of white and black pigment "more white than black". I do recommend with even smaller damage than this and on the bottom of your board to sand a dome to reduce sanding time and make a better bond with the angled material on your board to reduce the chance of a future crack.
If you are looking for a ultra fast repair were foam is not exposed "as super glue cures it can heat up some and melt the inside of your boards foam" you can use super glue Cyanoacrylate with baking soda on top. Not as crack resistant but very strong and very, very fast cure time. Easy to keep some with you in your rig if you need a fast small repair.
Happy water time. :)
Jonathan