Uploaded May 2022 | Updated September 2026, 2 weeks ago

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In this YouTube Mold Making and Casting Live™ Event, Milo Medunic will demonstrate how to cast silicone and explain how to choose the proper mold material for your application

What you will learn:
Why casting silicone is harder than casting resin
Applications that require silicone rubber
How to choose appropriate silicone for your project
Mold materials for casting silicone
...and much more!

00:00 Beginning
00:21 Intro
02:51 Cure Inhibition
04:17 Molds for Casting Silicone
06:16 Release Agents
07:00 Small Scale Test
07:35 Nitrile Gloves
09:33 Demo - Small Scale Test
17:20 Choosing The Right Silicone
22:35 Air Entrapment
25:55 Air Entrapment Example
28:00 Colorant
29:25 Small Scale Test Results
31:11 Demo - Scar Plate Casting
56:50 Silicone Applications
1:08:06 Demo - SORTA-Clear
1:18:23 Vacuum Degassing Silicone
1:27:41 Molding Material Options
1:32:28 Sealing Rigid Molds
1:35:29 Epoxy Molds
1:44:00 Flexible Molds
1:49:08 3D Print Molds
1:52:56 Alginate
1:54:26 Demo - Alginate Mold
2:01:06 How To Avoid a Glossy Casting
2:07:45 Casting Mold Star 20T
2:14:59 Demo - Compat 45 Mold
2:28:02 Demo - Ecoflex 00-30 Casting
2:36:55 Demo - Brush On Application
2:45:43 Slimer Pieces
2:53:55 Repairing Silicone
3:00:24 Seaming Silicone
3:02:22 Painting Silicone
3:13:00 Review
3:15:04 Alginate Demold

#siliconerubber #casting #moldmaking

Materials Used in Demos:

• Dragon Skin - smooth-on.com/product-line/dragon-skin
• Ecoflex - smooth-on.com/product-line/ecoflex
• Sorta-Clear - smooth-on.com/product-line/sorta-clear
• Alja-Safe - smooth-on.com/product-line/alja-safe
• Psycho Paint - smooth-on.com/product-line/psycho-paint
• Silc Pig - smooth-on.com/product-line/silc-pig
• Sil-Poxy - smooth-on.com/products/sil-poxy

Tutorial Links:

• How to vacuum silicone: youtube.com/watch?v=K7_k5uh9ux4
• How to repair a silicone mold: youtube.com/watch?v=Im-CkwpxkVM
• Material chart link: smooth-on.com/charts
• Viscosity scale: smooth-on.com/page/viscosity-scale
• Sil-Poxy repair video: youtube.com/watch?v=Im-CkwpxkVM&t=8s
• Rigid Urethane resin mold: youtube.com/watch?v=ODqnqdSRwrQ&t=101s
• Cure inhibition FAQ: smooth-on.com/support/faq/104
• How to release Silicone from Silicone FAQ: smooth-on.com/support/faq/94
• Silicone into Alja-Safe: youtube.com/watch?v=QHiGWcYIN3k
• Silicone painting: youtube.com/watch?v=29QgZVEhETo


Adult Supervision Required
Keep Out Of Reach Of Children
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