Internal Bouyancy of Surfskis - by: HangTen

For skis without hatches where you could put a buoyancy bag does anyone know if surfskis remain buoyant or even neutral bouyancy if the space between the hull and deck fills completely with water? Is it going to sink like a stone to the bottom?

Or further if it is completely filled with water and the laminate is comprised such that the interstitial spaces become water logged?