3D foam background question

[Mlamp89]

I am about to do a full foam Rock wall for my new 150. Basically going to take egg crate and place pieces of used live Rock along with plumbing on the eggcrate and then foam all around, sprinkle salt crystals onto the foam for texture. After it dries, I'll coat it in resin and sprinkle sand around. My question for everyone is this. What resin should I use?

Thanks

 

[NeonRabbit221B]

I used the exact one (Loctite I think) that the tutorial called out. My original plan was to have two overflows and the second one I did I used a different 2-part epoxy and it stained everything green. I ended up just using the 1 side so I can't remember which 2-part caused the issue. I would stick to what has been tested by others!

https://www.reef2reef.com/ams/foam-wall-instructable-a-full-how-to-step-by-step-guide.168/