New Zep Commercial(R) Clear Shell(TM) Mold and Mildew Inhibitor Protects Surfaces With Antimicrobial By-Product of Crabs ATLANTA, GA--(Marketwire - Apr 3, 2012) - Zep Inc. (NYSE: ZEP), a leading producer and marketer of a wide range of cleaning and maintenance solutions, today introduces Zep Commercial® Clear...