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grambell789 t1_je71ad8 wrote

If you want to buy time treat with boat quality epoxy from West marine. It will have to be really really dry for it to work well. I have some garage windows with similar problems and they look great. The surface isn't newish looking but that fine for what I want. Alternative is replace everything with new high performance windows, there is a pretty good tax credit right now for insulation and energy saving upgrades.