How to Cast Corner Molds Instruction

To cast the corner mold, prepare the corner support from plywood or melamine.

Flip the mold to the smaller end facing the floor, and cast it. Hold until concrete cures a little (it shouldn’t cure completely/ has to be fresh)

Cover the casted side with a piece of melamine or plywood plank and flip the mold to the other side.

To speed up the process, you can secure the casted side with clamps to prevent material flow and cast the bigger side.