02-12-2018, 10:18 PM
I used 5200 between the transom and platform on my last boat and it looked perfect after 10 years. No yellowing or cracking. Alternatively I used a bead of UV 4000 around my fish box and I had bits of it falling off and smearing after 2 seasons. To be fair it wasn't meant to be used for that application and as I understand it, works well as a gasket/adhesive. 5200/4200 probably will last a long time on your platform but will haunt you if it ever needs to come off. I would think silicone for the transom door trim.
