Measure out Mold Max 10 silicone. The mix ratio of Mold Max 10 is 100A:10B. Mix the Mold Max 30 thoroughly. Pour the mixed silicone into a new, clean bucket, and mix again using a clean, new stick. Then pour the Mold Max 10 into the hollow wax casting. Pour the material to the top of the tube, over the previous silicone.
Allow the rubber to cure overnight. The next day you can remove the rubber bands from the cardboard tube.