Milliput Epoxy Putty is a versatile putty which adheres to and will seal or bond metals, wood, plastic, glass, tile / brick, cement, ect.
Can be sculpted and when set can be turned, sawn, drilled, tapped, filed. Sandpapered, painted or cellulose sprayed. Can be used for mould making and can be cast.
Ideal for sticking rocks together in your aquarium, and it will not harm your fish.