"seeping crack filling epoxy"-GITROT,Gluvit, WestMarine makes one too.... They are all really thin 2 part epoxy made to insert with a bottle or syringe. It fills in wood to strength, perhaps might fill in the leaks. certainly worth a try and less time and money for replacing the teak. I put it in all the cracks and at the fasteners...which is where the leaks are (obviously)If you have holes to fill in your desk it seeps into the balsa core well.
