Environmentally friendly sealant that bonds to most common building materials. 100% waterproof and shower ready in 30 minutes. Strong (200 psi shear strength, 250 psi tensile strength) and flexible (500% elongation). Ultra Clear can cure underwater making it ideal for pool and marine applications. ECO-BOND Adhesives requires the use of a caulk gun for application. For best results cut the top of the tube at a 45 angle. Insert opening rod into newly cut tube end and puncture the inner foil seal. For best results, once the seal has been punctured, use the opening rod to widen the inner puncture hole.