Krack-kote Quart Kit End wall and ceiling cracks forever. No sanding or plaster mess. Completely invisible under paint, wallpaper or specialty finishes. Fast and easy to use--go from patch to paint in less than two hours. Cracks are caused by building movementspackling and rigid fillers just don't work. Use Krack-kote & Tuffglass fabric to bridge cracks with a patch that moves with walls and ceiling.