Couldn't find it either, the tube's writing is coming off so I can't read
the address. Got it at a place in Kelso, WA called Honest John's.
Did see a site that might have some info, MrFiberglass.com, he has both
opague and transparent colorants. Also saw lots of sites with West Systems
Evercoat colorants but they are a gel so I don't know if they will thin your
compound.
Saw where someone else was going to use the stuff to color epoxy on a wood
insert repair I believe, one of the replies mentioned the product by name.
Went to rodbuilding.org and put in "coloring epoxy" in the search engine,
you could e-mail him to see where he got it.