This instructable shows a way of repairing or replacing the sole of a shoe with urethane rubber. It has a lot of room for improvement. I used it as a way to learn more about mold making and casting. Follow along and pick up some do's and don't that I found out!

Step 1: The Materials

For this project I used:
1. plaster of paris for the mold of the shoes
2. cake pan for the mold container
3. Ease Release 200 mold release agent
4. PMC-790 urethane rubber
5. plastic mixing cup
6. stir stick
7. kitchen scale
I myself am interested in casting materials for fun or repair. I appreciate your sharing your experience using these products and methods. Thanks for posting.
Nice 'ible. If you want/need more traction, fine sand mixed into the rubber helps. I did that with tool dip &amp; a pair of beat up sneakers. <br>Btw, how's the molding going?
So I'm curious, since I've re-soled a lot of shoes in my job myself; Why don't you use regular soles and contact cement? You'd need to roughen the surface on the shoes and the soles, apply contact cement on both sides and stick (and press) together when dry (follow contact cement directions). Cut and and sand edges. Apply shoe-paint to edges if desired.
I certainly could have brought these shoes to my local shoe repair, or done it the conventional way myself. That isn't very much fun, though! This was more an exercise in learning and using urethane rubber than it was in shoe repair.
Perhaps an oven bake clay might work, for the small area you would really need to use for the mold. I'll have to brain storm, but I'm sure something else could be done or you could use a spray over the plaster. That said, this is a great idea! I'm thinking of all the shoes I've thrown out that I could have fixed.
Oven bake clay shrinks quite a bit when it dries. There may be a variety that doesn't, but I would avoid that possibility.

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