Review on Optimized Black Encapsulating Cartridge by MG Chemicals by Seth Damain

This is the dirtiest epoxy I've ever worked with. I rate it a 4 for its heat and chemical resistance, but I wish they had put that warning in the instructions. When mixed for the first time, it becomes liquid. I recommend that you hot glue all the seams of your mold and check for leaks. This material finds the smallest hole and seeps through everything. Mix it in another container and wait 30 minutes before pouring it into the mold. It took an hour to get thick enough to work with. I wasted a lot of it just because it leaked out of the bottom of the mold. UPDATE: MG Chemicals 832HD. The epoxy, which I paid more for and took me a few days to complete, turned out pathetic. It's runny, like waffle syrup. If there are tiny holes in the mold, it will find them. I had a big mess for the first hour until it started to thicken. I baked at 280 degrees for about 5 hours. Now, 24 hours later, it's still soft and porous. I don't think it will ever be hard. I don't recommend it for anything structural.