I think you are going to have to build some kind of frame work, like two pieces of wood as wide as you want the back-splash to be thick, but thin (like the size of a paint stirrer), then a piece of plexi glass. Work in areas like maybe a foot wide. Stand this frame up where the back-splash is to go and pour the Envirotex in until it fills up the frame. Allow it to set up for a while, till it is thick enough not to run, but not so thick that the frame won't release. Keep repeating this process till you get the back-splash the length you want it to be.
Hope this works out for you. It is my best educated guess! God Bless. (09/22/2009)
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