KEY COLD CURE/RAPID CURE EPOXY HARDENER (KEY CCB) is a specially formulated epoxy hardener (Part B) used with specific epoxy resins (Part A) for cold temperature applications as low as 35 ºF. KEY CCB is often used in coolers, food preparation areas, unheated jobsites, and any application that requires constant low temperatures. KEY CCB also functions as a rapid cure hardener when used in room temperature applications for limited time frame projects. Contact Key Resin for recommendations.