Our dining room has a wall that adjoins the outside. The wall is drywall (I think) and the floor is fitted wood squares. At least one of the squares is pulling up away from the floor. At the base of the floor, I can feel a draft. I have not been able to locate my pre-marriage incense sticks (my wife hates the stuff) to do a proper smoke test, but I think it's blowing in form the inside. Would that just be regular caulk? Is there a good way to ensure that it doesn't look too bad?