It works okay, but it mixes up softer than the more expensive hobby putty epoxies. It's a bit more sticky to the touch. It's very WHITE, so if your tank does not grow a lot of coraline it may look rather unnatural for a while. I use it because in bulk its about 1/2 the cost of the hobby putty epoxies. It's definetly trickier to use, IME/IMO.