Fordtech5
I send you a PM.
The best way to make a mold with silicon is to start with plaster of Paris and push the bait in halfway in to the parting line that you want and let dry. The next step is to mix a smaller amount of silicon and brush it onto master not too thick and make sure that there are no bubbles, you can hit it with a bit of heat from a hair dryer or heat gun to make sure that all the bubbles pop, not too much or you will cook the silicon. Let it dry for awhile and then mix up more to finish off that side. You can add small cut up pieces of silicon to the mix to add some bulk and save some $$$$ by using less mold making silicon, just make sure that it is clean and not oily or it won't stick to the fresh liquid silicon. Let it cure for a day and then you are ready to start the second half of the mold. Chip out the plaster of Paris trying not to remove the master from the cured silicon side. Clean it to make sure no P of P remains and then apply the mold release everywhere. Then repeat the same steps as before to create the second half. You should not have any bubbles in your mold after this.
You can replace the Plaster of Paris with modelling clay which I find makes nicer parting lines but you have to make sure that the clay is sulfer free or you will have a whole new set of problems