Making a silicone and ultracal matrix mold

A hard shelled mold with a squishy interior that captures and works well with undercuts.  Capture the finest details from any object you wish to replicate with this sturdy mold process.  Silicone is USUALLY self-releasing from almost any casting material, from stone to resin to low-temp metal (350 degrees max.)

Step 1: Materials

You'll need lots of stuff.  Fortunately, it's pretty easy to find.

From an SFX house (I like Silpac inc and Motion Picture FX Company):
RTV silicone.  I like Rhodosil 1065.
Ultracal

From your shed:
Clamps
Old crappy slotted screwdriver
Chip brush (to cut down)
Power Drill
1/4" twist bit
1" spade bit
duct tape

From your trash:
Old plastic container
small water bottle
cardboard
disposable foil pan or takeout container (clean)
Popsicle stick

From your artbox:
craft knife
sulfur-free plastecine
sculpting tools
hot glue gun
scissors (to cut down your chip brush)

Also:
small scale
whatever material you are going to use for your final cast (I used low-temp metal, but resin, sfx gelatin, plaster, etc will all work fine with this type of mold.)

Comments

[fungus amungus]

Very cool. Thanks for posting this.