You will need:
- blue dish-soap (any brand seems to work)
- silicone caulking (do not buy quick set silicone, you need 100% silicone)
- caulking gun
- something you want to make a mold of.
- masking tape - to patch holes in your positive, if necessary.
Step 1: Make your catalyzing solution.
This is by no means an exact science, I use blue dish soap because it allows me to see how much I have added to a water bath, I approximate that I used 4 oz. of soap in 64 oz. of water.
Step 2: Catalyzing the silicone.
I use the whole tube usually.
Step 3: Preparing the silicone.
When it begins to become a bit less malleable, and stiffen, it is time to sink your positive into your material. In this case, Mike helped me, and we used his dinosaur, Jesus. (hay-zoos)
Step 4: Make sure the mold is water tight.
You want to make sure you can still wiggle your figure out of your mold, without any of it getting caught, otherwise it can be very tricky to extract once your mold has set.
Step 5: Let it cure.
We kept this mold on top of the fridge, and put a bit of soapy water down on the plate so that the silicone didn't meld with the paper plate.
Also, this part smells awful. Make sure you do all this in a well-ventilated space.