How to Make a Silicone Mold for Concrete Casting скачать в хорошем качестве

How to Make a Silicone Mold for Concrete Casting

Making a silicone mold can be a very easy and rewarding project. This inexpensive and simple DIY project allows you to create a repeatable mold from very accessible materials. Some mold making materials can be very expensive or hard to find. Silicone and the mold-making ingredients are readily accessible to almost everyone, everywhere. In this video tutorial, you will learn how to make your own straight-pull silicone mold. When choosing what to make a silicone mold of, there are a couple things to consider. For a straight pull mold like this one, be aware of things like overhangs and undercuts. Protrusions can make it difficult to demold concrete castings without damage or voids. The surface should be as defect free as possible, unless that is what you are specifically going for. Silicone is very adhesive so use some kind of barrier between the item being molded and the silicone itself. Wax is painted onto the concrete item followed by a spray-on mold release agent. This will help the silicone mold decouple cleanly from the concrete item. Mineral spirits are mixed with silicone to thin it out making it more runny (less viscous). This mix can be painted onto the surface to help pick up fine detail and ensure full silicone coverage. This technique is the first step for this mold-making project. Silicone molds will have thinner and thicker spots depending on the item being molded. But silicone does not set when it is too thick. Corn starch mixed with silicone will make the silicone set at any thickness. It is also a thickening agent. A corn starch and silicone mixture is spread over the concrete item to in an even distribution to form the mold. 00:00 - Introduction 00:37 - Urethane molds and Silicone molds 02:48 - What type of silicone to use 03:37 - Beginning tips 04:59 - Mold release agents 06:07 - Wax barrier 07:15 - Technical steps and examples 07:49 - Applying release agent 08:11 - Avoid these for straight pull molds 09:13 - Making silicone mold 09:52 - Step 1 of 2 - silicone and mineral spirits 11:51 - Silicone slurry 13:11 - Step 2 of 2 - silicone and corn starch 13:26 - Silicone rubber paste 14:44 - Concrete base 17:02 - Mortar mix design 18:40 - Demolding process 21:58 - Silicone mold reveal 25:03 - First casting 30:30 - Demolding first cast 31:33 - First cast reveal 35:41 - How to repair a silicone mold 37:41 - Second test casting 39:56 - Second cast reveal 40:24 - Advantages of DIY silicone mold 41:05 - Colored casting 42:16 - Final reveal and conclusion 43:15 - More test samples Referral links to products featured in Creating Concrete videos - As an Amazon Associate I earn from qualifying purchases https://amzn.to/3vtmang – interlock stone mold https://amzn.to/3VIEmDX – universal mold release https://amzn.to/3TQ9e30 – silicone mold release https://amzn.to/3J7Q2II – sonite sealing wax https://amzn.to/4cDYz3T – Quikcrete red pigment https://amzn.to/4cIlDOK – Quikcrete brown pigment https://amzn.to/43EuVHL – Quikcrete charcoal pigment https://amzn.to/43H3cpO – powdered concrete pigments https://amzn.to/3J0MLee – Quikcrete bonding adhesive (PVA) https://amzn.to/3xlzwlW – Quikcrete bonding adhesive 4L (PVA) https://amzn.to/4aiGGGg – Sika acrylic fortifier 4L https://amzn.to/3vqjdUw – Drylok hydraulic cement https://amzn.to/3J3aDhv – Bosch mortar mixing drill https://amzn.to/4aiwQUS – 4.5" diamond cup wheel https://amzn.to/4aisWvb – mortar mixing paddle whip https://amzn.to/49nsDOq – Budget mortar mixer and paddle https://amzn.to/4ayjR1z – Sea sponge set for texturing https://amzn.to/3xvpE96 – Masonry / grout sponges https://amzn.to/3TGrZ8H – Marshalltown margin trowel (rubber grip) https://amzn.to/3VEhntP – Marshalltown margin trowel (wood grip) https://amzn.to/3xujXbx – Marshalltown point trowel (rubber grip) https://amzn.to/3TCp9Se – Marshalltown point trowel (wood grip) https://amzn.to/4ale5A4 – Marshalltown 12" square trowel https://amzn.to/4avz2Is – fine sponge float https://amzn.to/4cFsYPi – 5 gallon mixing bucket https://amzn.to/4cyIKeG – bulk acrylic paint set https://amzn.to/4aB9oBU – airbrush and compressor kit https://amzn.to/3U29Y6c – high range water reducer https://amzn.to/3TGModV – fiberglass reinforcement 3/4" strands https://amzn.to/4cEd87w – alkalai resistant chopped glass fibers 3/4" https://amzn.to/3J0YzNR – perlite 4 cubic foot bag (coarse) https://amzn.to/3xiCYxI – vermiculite 4 cubic foot bag (coarse) https://amzn.to/43H2xV8 – Aircrete FM-160 liquid foam maker https://amzn.to/4aHPFk9 – RTV 100% silicone (10 pack) https://amzn.to/3VKbWcS – Smooth-On Vytaflex 30 urethane rubber https://amzn.to/3xiEhg6 – Smooth-On skin safe liquid silicone rubber https://amzn.to/3VE04cj – slate texture skin https://amzn.to/3xmZfdR – basalt texture skin https://amzn.to/4aFjSQE – Variable speed wet grinder step sanding kit #CreatingConcrete #siliconemold #howto #concreteart