Tunze Coral Gum 0104.747 is an epoxy resin based adhesive for safe attachment of coral offshoots on stone substrates. Two-component epoxy putty. Suitable especially for coral reef aquariums. Particularly suitable for fixing hard corals on frag plugs or in the reef. Processing time: 3-4 min. Handling strength: 8-10 min (continues to cure up to 24 hours later). Grey color. Contents: 115 grams (4 oz.).