Loctite Power flex is a non-drip adhesive specially formulated with rubber, for applications requiring some flexibility and shock resistance. Ideal for overhead bonding, vertical and porous surfaces. Power flex Gel is water resistant.A non-drip adhesive specially formulated with rubber, for applications requiring some flexibilty and shock resistance. Ideal for overhead bonding, vertical and porus surfaces. Powerflex Gel is water resistant. Size: 3g.