The mold and the three sections of the support shell are layed out in preparation of casting. Spray the inside and outside of the rubber mold with Universal® Mold Release. Also apply release agent to all areas of the support shell. Set the mold into the Plasti-Paste® shell. The built up cut seam of the rubber mold registers perfectly with the channel in the support shell. Use mold straps to secure the support shell segments around rubber mold.