Seachem Flourish EpoxyTM is two-part epoxy putty that can be used during hardscaping to secure materials such as rock and driftwood for more stable foundations in planted aquaria. It has a working time of 5 minutes and fully cures submerged or emerged within 24 hours. Flourish EpoxyTM is ideal for working with stacks of rocks, where collapse could cause damage to plants or te aquarium itself. Flourish EpoxyTM is safe for aquarium inhabitants when used as directed.