I powdered a non-stick craft sheet with baking powder and squeezed out some silicone caulk onto it.
Then using a couple of scrapers I started blending the two together. One to blend the mixture and one to clean off the other.
When It got to the texture of Silly Putty or molding clay, I put Vaseline on my hands and rolled it into a ball. Then I flattened it with a rolling pin.
Then I took a button and gave it a coat of Vaseline and pressed it into it. I told you that I don't have many charms.
Make sure that you press it in deep enough to make a deep impression to fill.
Don't worry about it getting stuck. In four or five minutes it will be dry enough to gently lift and flex the mold popping it out.
The silicone molds that I made.
This was fun so I made a few more molds. This is great, I can make as many molds as I want without breaking the bank. The caulk was $4.00 and the baking powder $1.69. This turned out some really nice flexible molds. After letting them sit overnight. I got out my melting pot and melted UTEE and started making embellishments. These can be painted any way I like. I won't paint them until I decide to use them. That way I can paint them to match what I'm using them on.
My homemade silicone molds have been sitting out on my table for several days and still remain flexible. Although they show no signs of drying out I have decided to store them in a plastic bag. Well, I made a few mistakes. It was a learning experience. Now, I'm not sure that I have enough caulk left to finish caulking the other bathtub...but you know what they say about all work and no play!