Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
Whiel I have most of the outside teak off the boat and in the garage, I am trying to decide what to do with the backsides. I want to finish all sides to seal the wood bit at the same time it seems the caulk will seal better to raw wood than a water-proof finish (cetol in this case).
I sealed the 'back side' of my exterior teak with 2 or 3 coats of WEST epoxy. Entirely sealing the wood helps prevent water from creeping under and lifting a tight finish such as varnish or Cetol. The strength of the epoxy greatly reduces the chance of any sealant ripping loose bits of wood during subsequent removal.
As for "...it seems the caulk will seal better to raw wood than a water-proof finish..."
About the only stock exterior teak I bed are the hand rails. They stay sealed quite well with the epoxy coating. In fact, even with a soft sealant (silicone) it's a struggle to get them back off a couple years later for refinishing.
Although I like the epoxy idea, being lazy I will probably Cetol all around.
The trim on the boat seemed to have been siliconed in but most of it I could pull off with two fingers. I looked like the silicone did not stick to the gelcoat at all. I think it should help the wood sit more evenly and cushion it, so I will put some silicone under all the trim, just not anything with two zeroes after it.
The coaming cubby trim was held in place just by silicone, so I assuem that needs to be bedded.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.