Plus, if you ever decide to varnish them the moisture coming under and up through the wood will lift off the varnish in a month or two. That's why mine are Cetol'ed
I intend to use Cetol rather than Varnish.
SO, I guess I will have to seal the rails. Oh well, 24 feet of toe rail, seal both edges, times two rail = 96 feet of butyl taping.Oh yeah, have to do the rub rail as well, so 192 feet to tape. Wow, sounds like fun!