Original building construction industry trade magazine vintage ad for A. C. HORN COMPANY INC. of Long Island City, NY.  Cloudburst!  Has Your Building This Waterfoil Raincoat?  A sudden heavy downpour can cause extensive damage to a building and its contents.  Waterfoil, the Unique Treatment for Exterior Masonry Surfaces.  Old 1946 protective coating construction magazine advertisement. This ad would display beautifully matted and framed.