As the other tester, here's my initial review of OC's new Silicone frag putty:
Out of the package, the putty is really easy to work with. It's super soft and so it's very easy to pinch off a piece, and very easy to knead together. Unlike conventional two-part epoxy, it doesn't leave a nasty residue on your fingers, nor does it have an odor.
It mixes well in under 10 seconds, and stays flexible for a while. Unlike some putties that can get pretty hot while curing, so far as I can tell, this putty stays cool.
The mixed putty is easily shaped and can be worked with for a while. The instructions stated that you have around 60 seconds to work it, but it definitely stays malleable for a while longer than that.
The first thing I used it for was placing a frag onto the rockwork. The putty works well to conform to spaces, but I found that it didn't cling to the rocks very well. I like a very firm hold for my frags (as one fall could take out a whole host of corals), and I found that the putty stayed soft for a while longer than I would have liked.
But for the workability and ease of handling, it's definitely much better than your conventional epoxy.
I also created a series of frags from fairly fast growing corals in my tank that needed to be trimmed. Two are sunk into traditional two-part epoxy, two are in OC's silicone putty, and two are attached with gel cyanoacrylate only. We'll come back in two or three weeks when they've started to encrust to see how they're doing. Granted they're all different species, but I did one monti and one acro on each piece, so we'll see how this turns out.
I haven't tried using it for structural work yet, but so far when attaching frags to rocks and attaching cuttings to frag plugs, it's worked very well. I woudln't say that it'll totally replace the traditional epoxy in my reef 'toolbox' but it definitely has earned a place in there for the ease of use and cleanliness.
I'll be sure to check back in a few to see how those frags are doing
