TMC Reefers Epoxy Putty is perfect for bonding rocks, corals, and other items (including equipment) in marine aquaria. Easy to use, simply mix two pieces of putty in even quantities until it is all one colour and apply where required. Can be used on both wet and dry surfaces and is fully cured in 24 hours. Coralline algae coloured. Available in 120g and 250g packs.