I'm wanting to make a flexible mask that will fit my face very well. I've heard I could make something with liquid letex and I've heard some plastics tear easily. Any suggestions to something that is durable and will last a long time.

It will be the equivalent to a Zorro mask or a robin mask.

Nobody?

I suggest you call an area college or university art department and ask this question. They should be able to tell you which supplies to buy and where to get them.

Another idea is to call your public library's reference desk. They should be able to help in a similar way.