I think you'll find it difficult to get anything to adhere to the silicone...

Gompie

The baking mats I have (probably just like yours) are similar in thickness to the gasket rubber and about the same flexibility.  I think it would work.

You might look in a plumbing supply for the gasket rubber. 

I wonder: has anyone here tried polypropylene? It's what I'm working with at the moment for shadow puppets and I'm finding the sheets extremely flexible (ie. bendable without breaking) and sturdy.

I'm not sure I would use it for muppet-type puppet mouths, but then I've not actually thought about it til now.

I use plastic lids from ice cream and food containers. The plastic is thin, easy to cut and flexible. AND best of all FREE!!

LJ,
Do you cut the lid in half and add a hinge or do you just fold it over? Just curious.

I use Gasket Rubber from Lowes. It comes in 8"x8" sheets for about a dollar.

Do you cut the lid in half and add a hinge or do you just fold it over? Just curious

Yes, I cut it in half and add a hinge. Works great!

Yes, I cut it in half and add a hinge. Works great!

Interesting... what do you use for the hinge?

i've been using foam core board for mouthplates. Tom uses wood.

Here's a link to his youtube video series- very helpful with great ideas!!



-have a great weekend!!

Kimberly
http://joyfilledpuppets.weebly.com/blog.html

duct tape or fabric for the hinge.