J-B Wood Restore Repair Putty Wood Filler provides a permanent repair to damaged and rotted wood. J-B Wood Filler’s professional strength formula is ideal for interior and exterior wood projects. Use to fill in small cracks or large holes. It provides a hard workable surface in 15 minutes. Will not shrink, crack or split. Can be shaped, sanded, drilled, carved, screwed and painted. Ideal for rebuilding frames, securing joints or anchoring screws.