FM® 490A core splice adhesive is a modified epoxy material supplied in sheet form that may be cured in
place by either free foaming or restrained foaming processes. It may be processed at any temperature
ranging from 225°F to 350°F (107°C to 177°C). It is specifically designed to minimize variation in cell
structure induced by typical process variables such as heat-up rates and vacuum conditions. Typical applications include bonding of inserts or edge members to core and localized reinforcement of
honeycomb core where increased shear strength is required. Because FM 490A core splice adhesive
contains no metallic fillers it is appropriate for applications requiring radar transparency.