White Lightning Fix'n Finish 1-Step Lighweight Spackling Compound

White Lightning Fix'n Finish 1-Step Lighweight Spackling Compound is an interior/exterior, patching product formulated not to shrink, even on large surface repairs. Ideal for filling holes and cracks in most common construction surfaces. For use on: wallboard, plaster, drywall, wood, concrete and masonry. Rust and mildew resistant with no shrinking or cracking. The non-slump formula allows for smooth application and excellent filling capability.