Fill the inside on both halfs with plasticine, as a backing for the silicone.
Use dental silicone that sets in around a minit. Put half the amount of mixed silicone into both halfs, and pat it roughly flat.
Ive then put some graphite dust onto the silicone on both halfs, as a relese agent.
Put the key in and close. Leave to set.
Remove key. Then your ready to pour.
Ive used woods metal, Rose metal, cerrelow 117,and even old wheel balance weights. They all worked. Im going to try gallium next.


