Floorboard Caulking
Urethane caulk can be purchased in different woodlike colours, so choose a colour that matches the stain on the floor or is slightly darker. smooth the caulk into place with a wet finger. try to keep the caulk level with or barely below the level of the floorboards, similar to the way grout sits between ceramic tiles.. If you haven't sanded the floorboards yet, you could use old pine slivers from the old pine company (