When that rough surface needs a little something extra before finishing!
        Extra-Prep® can be used to skim coat interior and exterior walls and ceilings made of rough cementitious building materials such as block, brick, poured or tilt-up concrete. Extra-Prep® is excellent as a joint filler, too. This Ph tolerant, acrylic based, ready-mix product fills cracks up to ¼" deep with very low shrinkage and dries to an extremely hard finish. It's flexible and compatible with most exterior finish systems. Available in 5 gallon pails.
 
Item #: 4036
Downloads: Datasheet   MSDS