Wood putty filler provides a permanent repair to damaged and rotted wood. Professional strength formula is ideal for interior and exterior wood projects. Use to fill in small cracks or large holes. 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. Great for door frames, window frames and sills, sashes, eaves, corner boards, columns, posts, stairs, garage doors, fences, furniture, and more. 2-part polyester-resin based application. Fast drying, paintable in 1 hour.