2-part, medium-viscosity, industrial grade, polyisocyanate urethane adhesive. It cures at room temperature to form a highly flexible bond line.LOCTITE UK U-05FL is an off-white, 2-part, medium-viscosity, industrial grade, polyisocyanate urethane adhesive. It cures at room temperature to form a highly flexible bond line, providing excellent peel and shear strength. Ideal for bonding a variety of metals, plastics, glass, wood and more, it can also be used for potting and encapsulating strain and heat sensitive electronic components.