I have an old wide plank pine floor in my house but the boards have shrunk with age. I would love to keep the floor because I love the colonial/rustic feel but I'm worried about spending the rest of my life trying to keep all the dirt from filling up the gaps. My husband and I were considering filling the gaps with clear silicone sealer and then urethaning over it all but i wasn't sure if it would work. Has anyone tried this??