Henkel Loctite 4902 Flexible Cyanoacrylate Adhesive Clear is used for the assembly of flexible medical devices and bonding to substrates such as metal, plastic, and rubber. It has excellent sealing properties, fast humidity cure, and high strength flexing bond lines. It also meets ISO 10993 requirements. 20 g Bottle. For difficult-to-bond substrates such as polyethylene and polypropylene, use LOCTITE® 770™ or LOCTITE® 7701™ polyolefin primers.