Stone foundation is covered with what appears to be plaster similar to the plaster in the wood lathe walls Troweled onto the stone. Not a waterproofing product as it not on the cinder block closing the summer kitchen fireplace et al. Plaster is painted - accumulated about three gallons of plaster on concrete floor. Also cracks similar to plaster. Is there a way to seal/coat walls to eliminate this. No water problems currently in the cellar - minimal moisture during severe weather. Would much prefer not to have to remove all of the stuff as it would be very labor intensive. Is closed cell spay an alternative?