Elmer's ProBond Wood Filler is a patented formula that can be used on interior and exterior surfaces and is ideal for repairing holes, dents, scratches and defects on wood, wallboard, molding or painted surfaces. It contains ceramic microspheres that make this premium wood filler easy to sand and eliminate shrinkage. Elmer's ProBond Wood Filler is a stainable wood filler that works with all stains and paints.