INSTA-FLEX flexible thin CA is ideal for many applications, including the installation of CA hinges. When cured, INSTA-FLEX does not turn brittle and remains clear, even if accelerated with INSTA-SET. It has superior shock resistance. 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, we recommend drilling a 1/16" hole in the center of the hinge slots to insure the complete saturation of the hinge when INSTA-FLEX is applied. INSTA-FLEX has a different, less irritating odor compared to regular CA's, but still can not be used on white foam. INSTA-FLEX has also proven to be superior when bonding anodized aluminum..