all you need is registration holes
then your two piece mold will line up,
surround half the helmet with a divider, such as build up a soft clay/plasticene (sulfur free), etc. bed around it, and make indents in the clay so that you have divets, bumps, and little holes that the silicone will go into.
once it is cured you turn it upside down and do the other side, remove all that clay you put on it the first time and once you have cleaned all of it off the other side of the helmet you will see that the silicone you poured earlier has contours and is not flat, the next pouring of silicone will be your 2nd piece to this 2 part mold and will match up with these holes each time.
BUT REMEMBER to spray release agent first onto all parts of your master and the cured silicone from part 1 of the mold.
this stuff is self adhering, it will stick to already cured silicone if you do not use a release agent, if you ignore this step, your mold will be trapped.
also remember to lightly spray release agent everytime you want to mold something with thing layers at the edges of the 2 piece mold, in case anything were to close the seem. saves you a headache of destroyign your mold when demolding.
-=QuinN!
