How To: Mixing | Degassing | Basic Coloring | Coloring Techniques | Advanced


Part 3: Silicone Vacuuming

Step up the look of your sex toys with degassing

Uncured silicone ends up with bubbles when it's mixed. A vaccum chamber removes the bubbles to create a much nicer finished sex toy.

Silicone Degassing

Download - Print - Pour - Enjoy

Silicone is prone to trapping tiny air bubbles. You can see these air bubbles as little round dots inside the finished sex toy. While they aren't harmful, they are not pleasing in appearance.

If you find yourself making more than one or two sex toys, you might want to invest in a vacuum pump and vacuum chamber, which will remove the air bubbles by degassing the silicone.

Degassing is nothing more complicated than putting the mixed silicone into a vacuum chamber immediately after you mix it. This draws all the bubbles out of the silicone, so the finished sex toy is free of bubbles.

To do it, mix and color the silicone as normal. Then, before you pour the liquid silicone into the mold, put it in a vacuum chamber, turn on the pump, and keep it there until the silicone bubbles up and then collapses. The silicone will start to bubble, almost like boiling water, then swell up and collapse.

To do this, you'll need a vacuum chamber (mine is 3 gallon, but that turned out to be way too big; for making small numbers of sex toys, a one or two gallon chamber is fine) and a 1/4 horsepower vacuum pump. You can get both on Amazon or at hardware stores. Smaller vacuum pumps might not be powerful enough—you'll need something that can draw down to 28mm of mercury to work on Dragon Skin silicone.

What You’ll Need

  • Stick with platinum-cure silicone from reputable vendors. You can find platinum-cure silicone on Amazon or direct from manufacturers like Smooth-On. A Smooth-On "trial kit" is plenty to make several sex toys; a one-gallon container can make dozens.


By downloading mold files from this site, you agree to the following terms:

The mold files and sex toy designs are protected by copyright. You may use the files to print a mold on a 3D printer. You may use the molds to cast sex toys for your own personal use, You may not:

  • Sell, give away, or otherwise transfer the mold files to anyone else
  • Use the molds to make sex toys for sale to others
  • Use the molds to make sex toys to give away to others in combination with sale of another product
  • Reverse engineer the sex toy designs for sale, or to create derivative molds or designs for sale
Basically, don't be a dick. Don't try to make money from the work I did. If you like these designs and you want to sell them or adapt them for sale, contact me! We'll work something out.