short side walls

[hkngoutdrs]

I have all my pre work done. I'm getting ready to put my two part epoxy down. The question is what do do with that 8 inch side wall (part of the foundation). I read where a couple of guy ad some thing to thicken up the epoxy to keep it from running onto the floor.

Could someone please tell me what the production to use to help thicken up the two part epoxy?

Thanks