How to seal marine plywood (for jump seat)

[it4llc]

Our port side jump seat on our C28 has crumbled due to the wood getting wet and rotted. I'm rebuilding it with a new piece of marine plywood (it was originally built with marine plywood). What's the best product to use for sealing the wood to prevent this from happening again? I plan to drill the necessary holes and then seal the wood inside the holes as well.

 

[scross]

We have seen a bit of this happening on our starboard jump seat in our 2017 C-28. I have done some repair work on it but not complete replacement of the plywood seat yet.
If I were to replace the marine plywood I might consider a minimum 3/4” thick section of Starboard - perhaps with some aluminum angle reinforcement. I’d probably go with 1” thick Starboard just to be safe.
If sticking with marine plywood, I’d use a number of coats of Penetrating Epoxy Resin Wood Sealer like the MAS product. The more coats the better!

 

[it4llc]

We have seen a bit of this happening on our starboard jump seat in our 2017 C-28. I have done some repair work on it but not complete replacement of the plywood seat yet.
If I were to replace the marine plywood I might consider a minimum 3/4” thick section of Starboard - perhaps with some aluminum angle reinforcement. I’d probably go with 1” thick Starboard just to be safe.
If sticking with marine plywood, I’d use a number of coats of Penetrating Epoxy Resin Wood Sealer like the MAS product. The more coats the better!

Thanks - I thought about using Starboard, but wasn't sure how well all of the hardware would work on it, as well as the upholstery. The upholstery was attached with upholstery staples and I'm not sure how well those would go into the Starboard.

 

[it4llc]

I finished repairing the seat using a new piece of marine plywood, and reusing all of the fabric, except for the edging which i ordered new. I got a short nose staple gun from Sailrite along with a box of stainless steel staples. It all went back together fairly easily, except that i learned to gently put the screw in as I pushed one of the brackets out putting the first screw in too forcefully. All the other screws went in fine once I learned my lesson. FWIW, I reached out to Sailrite and they said the staple gun works well on starboad so next project I will switch to starboard and see. Hopefully this replacement will last a while though.