Tech-BondTM Blue works with a wide variety of materials and is extremely easy to use. With reasonable care, the Tech-BondTM Blue and Black bonding agents will last 2 - 3 years. If you keep the bonding agents in a refrigerator or a cool, dry place they will last 4, 5, 6 years or longer. For maximum strength, in conditions where the bond will be subjected to high stress, the bond needs to be fully cured before being subjected to that stress. The time frame for the bond to fully cure is 24 hours. Color - Clear. Viscosity - Standard.