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If you pull up the old documentary of the Hamilton Watch Factory you can see the room where they mixed bread dough to do the job that Rodico does today. Rodico is fairly inexpensive and does not leave an oily film on the parts. Any number of products can do the same job but Silly Putty costs a lot more for the same quantity of Rodico. When the glob of Rodico becomes contaminated it needs to be thrown away so it doesn’t spread nasty goo all over the watch parts.