Casting silicone

Quick question for you:-

Can I make silicone castings from a silicone mould? If so,what's the best way to do it?
Hints and tips appreciated!

-Paul.

Yes.

Airosol wax spray, best to do a few coats.

You're better off making a solid mould though, plaster, resin, crystalcast etc.

It should be similar to making a resin casting. But you'll need a good mold release agent. Something specifically made to keep silicone from bonding to itself. You'll also have to really be careful to avoid having air bubbles in the casting. You might have to do it in layers to prevent this.

Richard

What you seek is Pattern Release 202
Ideal for patterns and coatings used in the preparation of silicone rubber molds without inhibition. It can be used on a wide variety of pattern materials (wood, epoxies, urethanes, polystyrene, plaster and rubber) to name a few. Available in an easy-to-apply aerosol spray. Maintains excellent surface detail. Air dries with no buffing required. in short its a sprayable petroleum jelly
and will not let silicone stick to silicone if applied properly
I use this all the time when making two part silicone molds

Pattern Relaese 202

S &H - Freeman charges standard published UPS/FedEx shipping rates (unless freight is specified). All orders under $25 are subject to a $5 small order fee. International orders are subject to a $250 minimum order. there will be a HAZ-MAT fee added to the shipping


Andrew

Thanks guys

I use "vaselin oil" and it works well for my dental expander mold

Smooth-on do a good release agent. There's also a spray called DP-100 specifically made for this purpose.
Another way is to mix 95% Turpentine with 5% Vaseline - this will also work perfectly.

Anson