I mixed concrete with epoxy resin and it came out great! I used Quikrete Countertop mix and white and then added n some green ...

It’s then your job to mix them together and degas the result ... The evaluation involved silicone though. With hardened epoxy, you’ll probably have to use a new tube each time.

As the temperature drops, epoxy becomes much thicker and will not flow properly. This means that it is much more difficult to measure and mix the epoxy resin and hardener in cold weather ...