Two flexible cyanoacrylate adhesives are offered for bonding delicate, soft, or flexible medical substrates. Both Loctite 4851 and Loctite 4861 Prism instant adhesives are ISO-10993 biocompatibility compliant. These fast setting, flexible adhesives are ideal for flexible or soft substrates that are prone to cracking and tearing caused by rigid bondlines. Typical medical device applications include bonding of flexible tubing or balloons.