There are a lot of uses for rubber parts in many different work sectors. For instance, they can be used as seals for metal components. If you're needing to have some customized from scratch, then these tips can guide you in the right direction.  Create a Prototype Before you start having mass amounts of custom rubber parts made for your particular work project, it's paramount to first make a prototype. You can then take plenty of time to refine it over the months and make sure its design is perfect for what it's being used for.