Make Cardboard Mold Components
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To make this mold you will need to cut 7 rectangles out of cardboard. 2 - 5" x 0.5"
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Glue the two 5” pieces together to form the central block. |
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To prevent rubber from flowing inside the cardboard, seal the block with tape. Wrap the block with a strip of tape and fold down the edges. |
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Smear hot glue on the top and bottom to hold the tape down. Seal the individual 6” wall pieces the same way. |