Rapid prototyping and rapid tooling – need and relevance of rapid tooling – its role in making molds and mold inserts – how this technique is a better method for rapid production of sample products- how is it done – use of epoxy resin in rapid tooling – role of aluminum powder as a filler in these materials – other fillers for consideration – our experiments with combination of aluminum and glass micro spheres for such compositions – attempts to modify the properties of such compositions using amine containing silicon polymers.