#  Step 1: Prepare Cardboard 

 



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#### Make Cardboard Mold Components

Sort   ![materials.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/materials.png?itok=DAWNlyl2) 

 



To make this mold you will need to cut 7 rectangles out of cardboard.

2 - 5" x 0.5"  
2 - 6" x 075"  
2 - 1" x 0.75"  
1 - 6" x 12"



   ![center_block.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/center_block.png?itok=E26VBxB2) 

 



Glue the two 5” pieces together to form the central block.

   ![wrapping_the_center_block.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/wrapping_the_center_block.png?itok=gVVsuEIH) 

 



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.



   ![sealed_block.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/srtsandbox/files/sealed_block.png?itok=0dggu6fu) 

 



Smear hot glue on the top and bottom to hold the tape down. Seal the individual 6” wall pieces the same way.