Molding rubber convolutes takes special know-how, and Custom Rubber Corp. has it. We're experts in designing molds for any shape and size convolutes. Time and again, major manufacturers have counted on our experience to design boots that not only protect, but also simplify manufacturing. For example, we've developed rubber compounds with extra elongation and our own special tooling so that a boot can be made with a wide-diameter center, but small stay-tight ends...with no tearing.