Yes you missed it
They have a complete filler range on the website,

r13 said..
Great thanks, my bad, of course you are totally correct. I should have put "glueing filler" in when searching the site.

trojanfibreglass.com.au/product/fumed-silica/

Fumed silica sets very very very hard. No good if you need to do any fairing or sanding. You can go and use any west systems or other powdered additive.

The real hard to sand / fair are milled glass or milled cotton, best for bigger gapes & strong glue, I've found that to fair a large cove made with the above milled fillers it's very easy to lightly brush some neat epoxy mix over the cove and get a nice smooth finish, and while your at it, and if you want to lay some tape in nows a good time, just a little caution as you press the tape into the wet cove, the neat mix makes the part set blend wetter.

Thanks all a lot of excellent learnings there.

Kankama, I was struggling with a term to describe partly set epoxy"rubbery " nails it ! Cheers. I'm impressed with the way a rubbery/ toffee type fumed silica can be latently manipulated, the 1st time I worked with it ( as opposed to milled fibre ) was a tape and glue dingy, the ply i was using was a bit stiffer than suggesting maybe, so as the glue was at the toffee/ rubbery stage the tape started to let go, imagine a slow explosion and a sagging epoxy mess. Anyway the job was adapted to a stitch and glue on the run, the rubbery cabosil mended back into place beautifully. That night was also the 1st time I ran glass tape into " rubbery " epoxy. Ps the list I posted doesn't mention wood flour I'm sure it was a staple in the early days, anyway I've collected some merbu dust from the orbital sander to use for epoxy colour bog