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When making decor out of styrofoam, instead of using 2 part epoxy to seal after concrete is applied could I just take some silicon and brush it all over it? or is it to thick to work with? If that wont work what else can I get besides 2 part epoxy that wont cost a arm and a leg?
I don't see why silicone won't work. Just have to be fast and make sure oyu really get it into the concrete pores really well. You don't even have to really use anything to seal the concrete if oyu remove it form the styro. Soak it until it doesn't change your water paramemters. I would suggest soaking it anyway just in case you don't get it comepletely sealed.