Selleys Spakfilla Rapid is a ready-mixed lightweight filler that is fast drying virtually non-shrinking non-cracking & needs only one application. Features Fill cracks and holes in a single application Pre-mixed and ready to use Minimal shrinkage so no need to overfill Very fast drying allowing sanding and painting in a short time period Comes complete with a filling spatula for ease of use Water-based so can be cleaned up with water Paintable with oil and water-based paints Where can this product be used? Filling cracks and holes on surfaces where no structural movement occurs Filling cracks in walls ceilings doors windows Repairing holes in walls ceilings doors and windows What materials is this product suitable for? Wallb.