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Boat Forum / Building / September 2007attaching new epoxy to old fiberglass
Hi, I have a large sportfisher that I want close up the salon windshield with a solid fiberglass panel. I was going to cover the windows with plywood and then fiberglass over it. I was going to use epoxy & glass versus polyester & glass. Can I connect the new epoxy to the old polyester? >Hi, I have a large sportfisher that I want close up the salon >windshield with a solid fiberglass panel. I was going to cover the >windows with plywood and then fiberglass over it. I was going to use >epoxy & glass versus polyester & glass. Can I connect the new epoxy >to the old polyester? That's actually preferred, as the epoxy will have a superior bond. make sure you carefully seal the plywood (especially the edges) with epoxy as well. 5 years from now, it will make a difference! >> Hi, I have a large sportfisher that I want close up the salon >> windshield with a solid fiberglass panel. I was going to cover the [quoted text clipped - 5 lines] > carefully seal the plywood (especially the edges) with epoxy as well. 5 years > from now, it will make a difference! Epoxy will adhere to polyester better that polyester will adhere to polyester. Polyester is actually quite famous for cohesive (a bond with other polyester) bond failures. If you are going to put the plywood in the window space and glass over it, sealing the plywood is actually not the best idea. The epoxy and glass bond to the plywood will be good enough to create a solid structure and sealing the plywood will only serve to keep any moisture that does infiltrate from escaping. Good epoxy will bond to the plywood so well that there will not be a shear failure of the bond caused by the changing moisture level of the core stock. It will make the cabin spaces quite a lot darker. Matt Colie > geo...@w.com wrote: > [quoted text clipped - 23 lines] > > Matt Colie why not use foam instead of plywood. It won't rot. |
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