Used the below product for the first time yesterday and thought I would give it a plug.

http://www.trademe.co.nz/motors/boats-marine/parts-accessories/paints-glues-resins/auction-801159184.htm

I have been trying to buy a gelled epoxy for a while but haven't found a cost effective product to replace drippy expensive araldite.
First, it is half the price of anything at the hardware chains and is a 1:1 ratio mix. Each part has the same density so in large amounts you can measure by weight - very handy if you have digital scales.
It's pretty viscous so needs a good mix but everything does in this caper.
Cured density is very slightly more than water so is not super heavy.
I noticed no slumping when applied and it started setting up after about 30 mins so perfect for my needs, it's fully hard overnight.
Am yet to give it the real test which would mean a 20kg king on the finished product but looks good so far.
Hope this is helpful.

Stu