How NOT to Ruin Silicone Rubber When Making Molds

We decided to ruin some mold making materials so you won't have to. Here, we demonstrate and explain cure inhibition of silicone rubber. 00:00 - Introduction 00:55 - Two Silicone Rubber Chemistries 01:08 - Condensation Cure Silicone Rubber 02:14 - Addition Cure Silicone Rubber 02:34 - Sulphuric v Non-Sulphur Clay Demonstration 03:49 - Urethane Foam Experiment 04:49 - Urethane Rubber Comparison 05:16 - Summary of Moldmaking Materials Pro v Con Freeman Mfg & Supply is a materials supplier. The thousands of hours dedicated to producing this series was done in service to our industry. If you are looking for any of the materials shown, please visit us at http://freemansupply.com (our primary website for professionals) or http://miapoxy.com (curated for the DIY market). You can see all of our videos (in sequence and in context) on our dedicated video website at https://www.FreemanVideos.com. Or check out our YouTube Playlists. Or find your next video of interest here: Moldmaking & Casting Videos: 1 - Using Rigid Fast-Cast Urethanes for Casting Both Molds & Parts https://youtu.be/1h7b9rFChzw 2 - Making Flexible Molds with Urethane Rubber https://youtu.be/tMMtYWaugwY 3 - Simple Silicone Rubber Molds (Without a Parting Line) https://youtu.be/ozg1dxHwPFw 4 - Two-Part Silicone Rubber Molds (Forming a Straight Parting Line) https://youtu.be/0PDWC0qrKOk 5 - Moldmaking With Clear Silicone Rubber https://youtu.be/zzPZBXSQMgE 6 - Making Molds & Casting Thin Walled Parts (& Using Color Tints) https://youtu.be/qdAYMv39qko 7 - Making Two-Part Silicone Rubber Molds with Complex Parting Lines https://tinyurl.com/spf9z8hs 8 - Tips & Tricks for Moldmaking & Casting Parts with Intricate Detail https://youtu.be/unpNdHrw0g0 9 - Making Simple Multi-Cavity Molds https://youtu.be/RlbO7C6swZk 10 - Surface Casting Method #1 (featuring Gap Wax) https://youtu.be/sCyso98OhO0 11 - Surface Casting Method #2 (With Brushable Urethane Casting Resin) https://youtu.be/SVyr4relqqo 12 - Using Fillers & Pourable Foam to Lighten a Casting (& More) https://tinyurl.com/2cav5em5 Laminate Toolmaking & Composite Parts Videos: 1 - Laminating with Fiberglass & Epoxy - The Basics https://youtu.be/0dtcN3CNJ8Y 2 - Building a Fiberglass & Epoxy Laminate Mold https://youtu.be/VPRfQtIVtfM 3 - Vacuum Bagging a Carbon Fiber/Composite Part https://tinyurl.com/auf6d2d8 4 - Building a Laminate Tool with Epoxy Paste https://youtu.be/a78pS1Cv1w0 5 - Rapid Tool Making with the Repro Laminating System https://youtu.be/HTShkWfZFhw 6 - Making a Simple Glove Mold https://youtu.be/UBAha6YJDzE Preparing Models, Molds, & Materials Videos: 1 - Prevent Your Castings & Models From Sticking to Your Molds https://youtu.be/0hCI8R9yw98 2 - Weighing & Mixing Resins & Silicone Rubber The Right Way https://youtu.be/u0Oa7NfRT7E 3 - Eliminate Entrapped Air in Molds & Castings https://youtu.be/HgEZNpQxJb8 4 - How NOT to Ruin Silicone Rubber When Making Molds https://tinyurl.com/32uwjv3z