[Briguy]

I was just at a yard last night and saw a transom done with seacast. The guy had an old 22-2 aquasport. He cut out about the top 6 inches of the transom and raised it another 5" for a 25" motor. He made a plywood mould and poured seacast in. When dried, he removed the wood. To his surprise, the seacast shrunk and cracked in the corners. OUCH! That is not where you want a crack. Anyhow he was going to fill in the corners and then glass over it. I am not impressed with seacast. I redid my transom on my 23' and filled it in like an inboard with a cap. I used 2 3/4 inch marine ply boards with glass in the middle and then 2 layers on the outside and inside up to the rubrail. For the cap, I used 5/8 inch corecell. With only one coat of light glass and resin on each side, I can jump on it. Corecell is strong.(it looks smooth on the outside and like a honeycomp on the inside) As for a transom, I think what my fiberglass guy uses now is a very high density foam that is light, easily sandable and will never rot or let water seep.