Fiberglass at the Joint
On my 25, the joint is fiberglassed on the inside of the hull. I'm not sure if O'Day, routinely did this, or only on some models or only for some years? I'ts possible that it was also done by a previous owner. I know that some boat manufacturers do this as a 3rd line of defence at the joint against movement and water ingress. It may be impossible to get at all of your joint from the inside due to cabinetry and liners and such. I believe your choice in glue is correct as you don't want movement at the joint. Don
