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Bob Smith's Insta-Flex flexible thin CA is ideal for many applications, including the installation of CA hinges. When cured, Insta-Flex will not turn brittle and remains clear, even when accelerated with Insta-Set Accelerator. In addition, it has superior shock resistance and although not as thin in consistency as Insta-Cure, Insta-Flex still has good penetrating qualities and its application can be easier to control. For CA hinges, Bob Smith Industries recommends drilling 1/16" hole in the center of the hinge slots to insure the complete saturation of the hinge when Inta-Flex is applied. Insta-Flex has also proven to be superior when bonding anodized aluminum.