where to get purple glue?

[coral acquisition]

hi saw this glue that you can use to put the liverocks together or frags to rocks. they stay purple but i cant seem to find where i saw this before. any help would be good. thanks

 

[Travis L. Stevens]

You're looking for a reef safe epoxy putty. It comes in many different colors. Home Depots often carry a product called AquaMend that is reef safe. Most other hardware store available putties are not reef safe though.