Thursday, September 26, 2013

How To Make A Silicone Rubber Mold - The Right Way

If you have a large object, like this wood bangle, the easiest way to make a mold is with Silicone Rubber.
Your object can be placed in an open container like this one.  
I use margarine tubs.  The margarine lid is on....ultimately the lid is the bottom during the mold making stage.  (I cut away the real bottom as you can see in the picture.)
I HOT GLUE MY OBJECT to the bottom of my container so it DOES NOT MOVE after I pour in my liquid rubber.
This is EasyMold Silicone rubber.
  • Brushable/Pourable
  • 45 Minute to 1 hour working time, 24 hour cure. Cure rate can be adjusted by applying heat.
  • Produces extremely fine detail from original, no shrinkage.
  • Self releasing, no mold release agent required for most applications.
  • High heat range, up to 400º F.
  • Strong flexible re-useable molds.
  • No vacuum equipment required.

 Here is my rubber curing after I poured it into my container.
 24 hours later I take the lid off.  This gives me a chance to now slide out my mold.
Ta Da!  Mold is perfect.  I will now remove the original wood bangle and start pouring resin into this new mold.

This post was designed, photographed and written by me.

It appeared on Resin Crafts Blog.
Lori McConnell said...

This is really cool - and can be done with so many different items!

LeopardQueen said...

Looks great! I was wondering, have you ever tried to anchor your cast piece with clay instead of hot glue? I've done it with some success. Also, is the EasyMold Silicone self-degassing? I see it needs no vacuum equipment.

Carmi said...

Clay does indeed work...I just don't have any in my studio.
The silicone rubber does indeed self de-gass. I have one more how-to showing you some tips on that too! (if you can't wait they are included in the instructions.)

Anonymous said...

Have you ever heard of using one of these molds for ceramic.slip?

Carmi Cimicata said...

I have not tried that so I would recommend you ask customer service for ETI.

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