Loose, grime-gathering seams in vinyl flooring may peel away at your patience, but you can fix them. Special sealers applied to the seams in sheet flooring can hide a repair or prevent a loose seam from getting worse and tearing the floor. After gluing down a loose seam, you must also apply a seam sealer to prevent moisture and dirt from getting beneath it. Vinyl flooring repairs can take practice so if you've got several vinyl floor seam repairs to make, it may be best to hire a pro to fix all loose seams in vinyl flooring at once.