From the Manufacturer: HARDMAN Double Bubble Green-Label Epoxy 04004 Crystal-Clear (Clear as Water) is a two-component, room temperature curing epoxy adhesive designed with a unique feature, it dries completely clear. It is solvent-free, and can also be used as a coating or finishing compound if necessary. With its solvent-free feature, it can be applied over old coatings without lifting them. It is self-leveling and does not blush so it covers and fills scratches. The cured system is effective over an operating temperature range of -30°F to 160°F (-30°F to 160°F). HARDMAN Double Bubble Green-Label Epoxy 04004 Crystal-Clear is recommended for the following surfaces: Stainless Steel, Aluminum, Other Epoxy Finishes, Glass, China, Crystal and other thin surfaces. TYPICAL USES HARDMAN Double Bubble Green-Label Epoxy 04004 Crystal-Clear is designed to repair printed circuit boards (also does not corrode copper), optical fibers, lenses and other optical equipment. It is an excellent repair epoxy for jewelry, art objects, and other applications where a clear bond is needed or desired. Working Time: 60 minutes Handling Strength: 8 hours Color: Amber Dry: Crystal Clear Viscosity: 14,000 cps mixed