I installed a new tub which does not have a flange.
Before I put up Duraboard what product, if any, should be used to seal the space outside of the tub's edge (garden/jacuzzi type of bathtub edge). The tub is set on the floor and has 2X4's used for leveling under its edges (alcove type of install).
Once Duraboard is put up there will be open space past the tub's edge.
After tile is put up then only the line of caulk would be preventing water from getting inside the wall. Is caulk enough, or what other sealant should I apply to close that gap?