Have you ever heard of Multi-Mold Pellets? At first glance the pellets look like rock salt. But, they are actually small plastic pellets that become malleable when heated in hot water (140 -170 degrees F) They can be used to make molds, reverse molds of texture plates, doming forms, and more! 
 
To warm, place a small amount of pellets into a stainless steel strainer
 and then place in a pan of hot water. When they become clear they are 
ready to mold.
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| Pellets in pan of hot water | 
  | 
| Pellets are ready to mold | 
  | 
| Forming a shape with my fingers  | 
 
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| New handle  | 
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| File with no handle | 
Here, I formed a handle for my flat file. Once you form your desired 
shape, allow the plastic to air-cool before using. The plastic turns 
opaque and hard once cool. If you want to re-use or re-shape, just heat 
again until clear and re-shape.
 
 For more tips on using this great product, go to the mold-making section PMC Connection's website.