Please post a picture. The transoms vary. On my 19, I "recaulked" the seam with Lifeseal. Once set up I removed the screws one at a time and pumped a lot of lifeseal down through each screw hole since there is a 1/2" of space between where the screws goes through the transom piece and actually pierces the deck. Looking at the screw holes from behind the transom, there is a "pad" of sealant around each screw shaft now. Sealing from factory was half-assed and asking for future trouble through the screw holes. I hope that is clear.
The screws at the actual floor had little to no sealant and that is not a small deal.