Raj Sharma

But the problem with silicon is that they are very expensive and not alkali resistant

What you are saying is a sealant! I want to make rubberised pvc molds for casting stones in concrete! its is somewhat similar to formoplast But thanks for taking time to check the question Got what you are trying to say! But is this silicon a single component or any curing agent will be required to use with it!

Hello I am interested in mold making for stones, In China I saw them processing pvc silicon using a jacketed reactor and pouring it directly on open cast stone in a box with using extruded or any other complex processing. can you help and guide!