I have a crack at the top horizontal part of my transom. This boat is a 1979 procraft and frankly, its old.. Its given me some great summers and some horrible ones. It was given to me for free and I've done a bit of work on it specifically the motor. I have had it for 5 years and these cracks have always been there. There is one on each side and they've always been covered with silicon or something. However, this year its seems like the crack has gotten bigger. The actual transom and wood seem sound but am worried about the crack. Can I do something to fix it?