[65Bowrider]

Ok, I'm going to stick my head out on this one, because I think Seacast is pretty good stuff!
Skip and I just replaced our bowrider's 47 year old original wood transom with Seacast. As with anything, if you don't follow proper procedures, you can get yourself in trouble. But the phone support with the Seacast people was terrific and we are very pleased with the results. And Skip did put our-created sample to some brutal tests with vice-scripts and come-alongs trying to pull it apart ... Then the sledge hammer ... It passed all his tests.
So, if your replacing your transom and don't want to cut the inner or outter skins, pourable Seacast is an option to consider. Just my opinion.