NO MESS Silicone & Cornstarch plus DIY pourable Silicone MOLD MAKING 

You are most welcome.

It would have been very helpful to see something that has been moulded into it though, to actually see the outcome. Thanks

I just bought 2 10ox 100% silicon tubes for $14. This is 1.5 times more expensive than 32oz of smooth-on from amazon.

@@MindBodySoulOk Well, then, let's hope that the viscosity of your smooth-on is just right, and let's hope you don't need to make many molds.

@@GEOsustainable I've made tons of molds with smooth-on, it works great. I wanted something cheaper, this isn't cheaper.

I am glad you did, and that I am able to help. I have a few more on the subject of silicone. I hope you watch them, as silicone has a lot of interesting uses. And, I hope you share.

Yes, the water will evaporate, while rendering the more flammable solvent inflammable, taking it with it. The cloth is more flammable with solvent on it because it volitalizes more easily as the cloth increases the surface area.

My pleasure. Check out a few of my upcoming videos on clay and silicone used for art.

Thank you, Dr. Khatib

I made many big mess myself before I remembered how to ice a cake. Glad you found me. I love to cook, so much of this comes out of my kitchen.

Oh yeah I want to mold stone surfaces as well so I may mix different concrete types to make artificial stones

You too. I am thrilled it helped you. All I do is turn on the camera and start talking. Only thing I ever released was my high school graduation speech. I was the Valedictorian. I must have got the gift of gab from my dad, everyone gathered around him.

Thank you. I have been meaning to put a vid on this. I am glad you find value in my content. That is my best reward.

@@MzSweetheart96744 your welcome!

Do you use like the naphtha? Just eyeball it till you hit your desired consistency?

@@handicraftress9448 it's how I l learned to do it. Just do a very small test first so not to waste anything.

All great questions. There is a black color. I discuss mold release agaents in another video, look for the title mold release recommendations. yes, it depends on the amouny of thinner. I use cut up silicone also. I do not recommend anything else. Thanks for watching and subscribing.

Thank you for your generous comment. I am happy you have found value in my content.

I am thrilled you like. Here is a new version wherein I make something useful ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UaVkGWEqPs4.html

I just pass along what I know. I am glad you enjoy my content.

I'll see what I can do. But, really, it is a matter of thinking it out for yourself. How would you do it? The way you describe it would work just great.

My pleasure. I am glad I have helped you.

Never tried it.

Sounds great.

I am so glad you find value in my content. Thank you for your comment.

It sure does help! The non-acetic acid silicone cures (is rain ready in 30 minutes), so it is a bit faster than the less expensive kind (evolves acetic acid). You can include the link to the other video for those interested in checking it out. We are an inventor community here. Share away!

@@GEOsustainable, i don't know how to 'include the link'. i've seen 2 on the subject. one is called thinning silicone for seam sealing by franco darioli. the other i saw was make your own seam sealer by maxpatch67. there are others. just type in the subject and a plethora will appear.

@@vsvnrg3263 here we go. thanks for your help ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0tCyT9p8Uys.html is the link to Franco video

@@GEOsustainable that's so nice of you to include someone else's link.. thank you :)

Thank you. I am glad that you have enjoyed it and that I have helped you with your projects.

Well thank you. I am glad you like.

No, the working temperature of silicone is 350F (175C). What you need is a green sand mould. I am so glad you asked before attempting this.

Cheers, I have been to the Phils, spent time in Manila. Wonderful country, lovely people, great food. In using silicone, yes, it will remain flexible and an ideal application as you have asked about. Go for it. I want to mention, when you thin silicone, if it is thick, add cornstarch.

@@GEOsustainable Thanks for the quick response :D We all appreciate what you are doing. Will update you on my project's progress!

Linseed oil will work just fine. Cool question.

Easy. No worries, yes it cures smooth.

It should cure to the texture of whatever you are casting. Shiny object=shiny mold. Dull object = dull finish on the mold. Hope that makes sense

@@erinbs1072 Perfect sense. :)

Upon re-read. Friends. Silicone is a SUPERIOR adhesive to the glass. You NEED a mold release. I posted a video on this to help folks who wanted to copy glass objects. Look here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gJcTeh4GHA8.html

Sounds right. Give it a try. Let us know. Thank you.

You are so welcome!

yes, sometimes men just fiddle with simple things too much. thanks for sharing!

Yes, you may use any hydrocarbon solvent. You may also use something I discovered that no one on YT has tried. Find that here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ci28Y3Z3bYU.html

You're most welcome.

I love it. You are experimenting and gathering you own results. Excellent. A few hours is awesome.

@@GEOsustainable I figure the time to fully cure is around 12 hours.

I have seen other makers report that the cured mold shrinks significantly when mixing silicone, cornstarch, and naphtha. Did you experience significant shrinkage? Can you estimate the ratio you used and the approximate consistency?

Yes, that is why I used silicone oil to thin the silicone caulk. Once the silicone caulk cures, it is fine for masks. If you plan to mold your face, you need to gather more information to be safe, like use a mold release, air holes to breathe, and so on...test on other areas before covering your face. Although I think using silicone oil would be a very expensive method for mask making. Latex would probably be better suited. It is a great option for molding plastics. Glad you liked the videos.

GEO sustainable thank you very much, my plan is to use the silicone for a mold only, and will make the masks out of gelatin. I was originally looking at Smooth on for various projects but found them to be too expensive. In terms of life casting someone’s face direct I would use alginate. But as for casting off the sculpture I will use this method again thanks for getting back to me

Glad it was helpful!

you will ruin your blender.

Not to mention possible sparks that could make the entire thing catch fire! Electrical fires are not fun either!

That is a great idea. It does take a long time to mix thoroughly.

Thank you. I am so glad you like my content. I would be happy to make a mold for you. Just email me, my email is in the description.

My pleasure. I have new videos coming, so stay tuned.

Don't know, you can certainly try it.

Correct, bathroom silicone will not work. You have to use 100% silicone, and look on the back, it has to have the MSDS statment saying ...Acetic Acid is evolved in curing. I did not like the soap method (too messy and I could not control the cure time) but, it does work.

@@GEOsustainable i could of sworn it said the plumming kind was pure. mine just came out like if silly putty and play dough had a baby. i think i'll just use it as a buffer/mattress for when i work with plasticne, or mold it into little critters, stick some fake eyes in it and cast it in resin (or just one big frog)

@@kaiyodei Make a video. I think that may turn out cool.

Thank you for knowledge. We should all be very cautious when working with chemicals.

Yes, Naphtha is a common paint thinner, as is mineral spirits. Either will work. All are hydrocarbon solvents. I would not use these as gasoline, as the energy content is far too high for an engine, it will likely explode and break the engine. I recently posted a video wherein I used an non-solvent option, you may be interested in watching. Hope it helps. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ci28Y3Z3bYU.html

You are most welcome.

You should email me. My email is in the description.

I have finally been able to make a video which includes silicone gasket making. I hope this helps. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-So5TMgzIuMw.html

About a week, I just checked a mold I made a week ago and I really don't smell anything. Have patience. And thank you for your question, This is good information as I never considered this before now.

I have gotten this question a few times. So, I will be producing a video on this subject.

NO. This working temperature of silicone is 300F. For molding metals you need a refractory cement to make your mold. Look for a product referred to as Green Sand, or a professional grade refractory sand.

It depends on how thick it is. It may not cure. At least you know what you did wrong.

@@GEOsustainable Indeed! I'm all set if i need to take another stab at it 🙌 thank u

@@MrsEarth-pf4cr My pleasure.

You got me. I don't know what a shrink mold is. Try and let us know.

@@GEOsustainable Well, with two part silicone, you can add one of the substances I listed in the original comment to the mixture (so that a significant proportion of the mold will be comprised of the solvent rather than silicone) and produce a mold from which the solvent will eventually evaporate, leaving a perfectly proportioned but smaller version of the mold.

MEK is a naturally occuring solvent, recently approved by the EPA as an indirect food additive (whatever that means). I have not used it. The cornstarch should act the same, as a moisture loving additive that cures the silicone, and the short answer is that I have yet to use anything to thin the silicone that affects the cornstarch. The procedure of mixing is critical, and I demonstrate in this video...ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sIQkFVftDZU.html

Yes, the Naptha will evolve out so your item will shrink. Silicone caulk straight from tube does not shrink. Do not thin with Naptha if shrinkage is important. I have solved this issue with shrinkage of thinned silicone here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ci28Y3Z3bYU.html

@@GEOsustainable ok thanks, ive made alot of molds but with more like a paste then i found your vid but if it shrinks then ill stick to the paste that shrinks to but not as much

White Spirit will work. It is not the same, but both will work.

no

Great questions. Naptha is a hydrocarbon based solvent. Therefore, any other hydrocarbon based solvent will work. You should be able to use a sustitute that you can find in your country. You may also use Silicone Oil. I plan to make a video demonstrating Silicone Oil soon. If you have any problems, let me know here in the comments. Thank you for your inquiry.

@@GEOsustainable your well come👍

@@nejdetdost Naptha is an old-fashioned lighter fluid like people used to refill their Zippos with. It's a stable, flammable but not explosive like gasoline. It's also less caustic than, say, Acetone or Xylene.

Yes. This will be perfect for cold process soap molds.

@@GEOsustainable thank you I've been trying to find an alternative to buying the moulds as they are ridiculously expensive where I live🙂

thank you

Yes, it will shrink if you add solvent as it evaporates.

Thank you

Probably the person who cannot use their and there correctly.

and socks

My pleasure.

I am so glad that I was able to present content that you found helpful.

Thanks for sharing. I'll try it.

@Michael kilby Yes, the Distilled water speeds up the cure time. For the amount you were mixing, 1/4 teaspoon is I believe the correct amount. the Silicon will adsorb it and cure faster.

Thanks man

Why "Distilled" water. Is it ok to just use tap water?

@@benju2438 free of contamination

I am glad my content was helpful. Your kind words are very inspiring. Thank you.Have a look around, I have many helpful videos on silicone. And, my next one is also going to be on silicone. I also have a video about candle testing with covers how to do it safely. You may want to check it out.

You are most welcome. Yes, I plan on showing folks alot of things that are silicone that we pay far too much for.

This video is interesting. May I know is the silicone caulk food grade. I want to use the mold for jelly making. Looking forward to your advise. Thank you.

Yeah, over-kill the tool to open the cap that is over-kill on some sort of child or idiot safety? That blasted cap is the result of government regulation. You have to twist it hard and then pry off with a screwdriver. Way more dangerous than a screw cap. I miss the old days, when it was the responsibility of the adult to keep things out of reach. These days, the government thinks they need to do all the thinking. Win, win, win for governments. They get to regulate you, tax you for the privilege of regulating you, and spend your money giving jobs to people that like to regulate others. Anyway...I thought it was funny, so I just said it.

My pleasure, and thank you for sharing your plan. Let us know how it works, please. Consider subscribing as I plan to do many more videos based on feedback and comments. Your idea sounds like something others would be interested in seeing me do.

Well thanks. Consider subscribing and stay tuned as I plan to do a lot with silicone and mold making as we gear up to replace many one use oil based plastics with bioplastics. Good information, thanks for bringing that up. Yes, I have one and is something I too would recommend folks look for.

omg Nanci! thanks i didnt know why its used for this tool!

Excellent. Wonderful to hear that you found value in the video.

We all know that one. Well, now you know for next time.

@@GEOsustainable Yes I do.

It has to be 100% silicone and the type where Acetic Acid is released in curing. Dap is just a brand name, your home center may offer another brand. The easy thing to do it look for the less expensive type and look on the back label to search for the words...Acetic Acid is evolved in curing. The type where Methanol and Ammonia are the catalyst will not work.

You may have to make a multi-part mold, with parting seams to aid in removal. I thin pour portions and use mold release between pours (sections). Cornstarch makes silicone stiff as silicone can possibly be. Elasticity can be modestly affected by adding Glycerine.

Yes, exactly. Thanks for sharing. Most folks don't know this.

I am glad you found value in my content. Thank you for your comment.

It's no doubt a great mess saver. I can't help but think of, a zillion of those bags in a heap. 😪

The bag is a good idea but I was having an anxiety attack watching him try to work it into the corner !! Must be one of those people that can't get any toothpaste out when the tube is still 1/4 full..😂🤣 Just lay the bag on the table and use anything as a straite edge to push every spec of the silicone where you want.. Just like a tube of toothpaste someone has squeezed with there whole hand leaving it full of toothpaste instead of laying it on the sink and simply starting from the opposite end flattening it towards the cap naturally pushing 100% of it out.. 👍🤣 Goodluck !! ( Its not meant to be a negative comment.. Good Vid)

Awesome.

Hi 600 miles. First, I want to apologize for not replying sooner. I did not get the notification. I answered this very same question and it is in the comments. Abdallah wanted to know. So, I am making another video wherein I will use release agents, as it seems that is something I could have included in the video. Unfortunately, most never watch more than 4 minutes, so putting in everything possible would most likely not be seen. Very few people watch the entire video. To answer your questions. I would not use a silicone based mold release. I tried it and it absorbed into the mold. What works for me are 2 things. PAM, a vegatable based cooking spray, and SOY WAX. Both can be washed off. Thanks for your comments. And subscribe for more upcoming videos. I have noted to include more information on possible trouble areas.

It will likely have a small seem that you can fill with thinned that I demonstarted in the second part. I urge you to watch more of my other videos on the subject of silicone first, as they contain additional tips and tricks that will be a value to you. Particularity, the one on mold release recommendations.

Great questions. This will make perfect molds for pouring concrete shapes. The thinned silicone is just as durable as straight from the tube. If you thin it, allow for a bit of shrinkage.The cornstarch serves two purposes. One is to speed up cure time, and the other to to cure the silicone should the mold be very thick (more than 1/4" will not cure for months, so use the cornstarch). Yes, the thinned silicone will be brushable. I have a video showing how and give mold release recommendations. Check here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gJcTeh4GHA8.html

Excellent ideas. Thank you for sharing with us. I'll pin this so others get to see it.

Howmuch glycerin have to use for 1 unit of silicon?

@@BabayagaEvi - Not much. For 1 tube I just used about 1-2 tablespoons. It also helps to coat the object with glycerine.

@@TodAG69 thank you. Silicone+glycerin only. I will try it.

And how clean my hands from this material??

Awesome, thank you. I am glad you liked. I like your ideas. I made a video on mold release recommendations, and one on pouring. I hope you check them out. Here are the links. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gJcTeh4GHA8.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sIQkFVftDZU.html

I should clarify - I knead it with a stick on a sheet of waxed paper.

I am happy to share how I do things, I am glad you like it. Yes, you can use any paint thinner, however, I have a better solution I want to share with you. Here is a link to one of my most resent videos on the subject of silicone. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ci28Y3Z3bYU.html

Thank you so much 🤗🤗

Thank you.. I needed this video!! Taught me what I need to know!

@@ashleymartinez6830 Wonderful to hear.

I posted a video for you. Alcohol does not work.

@@GEOsustainable thank you for going to the trouble of finding my comment, and making the video. Above and beyond.

My pleasure, glad to help. Yes, you can use this method for not making a mess for many projects, not just silicone and corn starch. I try to mix all my chemistry this way. I have another one where I mix Naptha in a ZipLock. Works great too.

@Marilyn Dreamwalker Mejorado How is the result with bread flour?

I am glad I could help. I love helping folks save money.

Great questions. It takes quite some time for the Naptha is evaporate completely out, it has a smell 2 weeks later. So, caution. Once the thinner has gone out, the working temperature of silicone is 350F. Therefore, the flame of the torch WILL burn the silicone.

@@GEOsustainable so I'm my case I need to just buy the pre made pour silicone then. Ugh

@@EverydayArtByBrittanyGunter Use a hairdryer 👍

All silicone will burn if subjected to greater than 350F. Please, use caution.

Yes, but watch my other videos on Silicone, as each one has information not addressed in this one. You are very welcome, it is my pleasure.

Thank you for watching. I do like to be corny every chance I get. Glad I made you LOL.

Yep, all will work. I use wax and made a video on mold release recommendations. Watch here. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gJcTeh4GHA8.html

I am truly grateful for your concern and your comment. Learning to control your tool is important. If you watch, the base of the knife was hitting the base of my thumb, so not possible to cut myself. The shank of the blade butts onto the base of my thumb...perfectly safe. I can also FEEL the resistance of the material I am cutting and plan for a slip. Let me teach the teacher. To be 100% safe with a knife, you need a back stop, a way be bleed off (pun intended) energy of the muscle activating the knife. Teach how to use tools, make creative engineers when you have a chance to teach. Making them afraid of tools is a very bad idea. Teach them about stored energy and how to always have a plan to RELEASE or RETARD stored energy so NO accident ever happens. That 'plan' involves having complete control of any REACTION. As an engineer, reactions happen all the time, it is your job to involve the reactions in your work. Now, if you are afraid a child could cut themself, don't give them a knife. Don't give anyone a knife until they have learned to use it and CONTROL it. Then there is the fact of 2 things I taught my son when he was 1 y/o. What a burn is and what a cut it. After that, just saying the words are all you need to keep the kids safe. If you do that, your kids will be perfectly safe. As a teacher, what if a kid somehow cuts the kid next to them because they were 'cutting away'?...I have seen it happen at work. Then there is the whole boys and girls do things so different. A GREAT IDEA FOR A VIDEO. Thank you.

Yes, it will stay flexible for at least 50 years.

@@GEOsustainable does the silicon is as stretchy as the original blend of it it more fragile?

@@simonsimon405 Great question. It remains stretchy as the original, and just as strong. No worries.

Great question, and I am so glad that you asked before attempting. I made a video on Mold Release recommendations. I strongly encourage you to watch. After watching, if you have any questions at all, leave a comment or contact me via email. Cheers and thanks for your question. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gJcTeh4GHA8.html

Yes, you can use low odor mineral spirits. Give it time for the smell to go out (even low odor has an odor). I will do another video on how to make Casein Ivory, so save your wifes brotch until then. You are correct, it is an acid and has the very slight potential to etch into the ivory. Let me do the Casein Ivory video to give you a safe way to duplicate her brotch. A good option, I can suggest you coat the brotch in wax before making the mold. A very thin coat will give a good replica without danger to the original. If you use soy wax, you can simply wash it off with soap.

Thank you. I had no idea concerning the soy wax. I will definitely try that. Thank you.

Thank you. I am thrilled you like. You may want to email me for this question, so we can work it out. I am not sure what the wedges will be made of, or the mold.Thank you for subscribing, that means I am giving you content of value. Once we work it out, I can most certainly make a video of the process.

@@GEOsustainablethank you for responding. Please give me your email address.

As always I suggest coating your original with a wax or other release agent and protectant. The silicone can handle up to 300F. So, yes to both of your questions.

You can make a reusable mold maker that will pour using gelatin and glycerin. Videos all over RU-vid about it and it works fine with resin. If it breaks or you want something else just clean up and melt the mixture again to pour for a new mold.

@@BlackCat_2 Excellent idea. I made a video about it. Check here @Jorge Navarro ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mSEBSKqh8Ms.html

@@BlackCat_2 Thank you for sharing. You get a pin.

BlackCat2 l

I like your other world thinking. I have worked out a formula I share in many of my videos for adjusting cure times. For you, a 10:1 will give 1 hour cure time. If you need more time than that, don't use any cornstarch.

Yes, I made a video on how to color silicone. Check it out here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-S5ChHwiXRl0.html

Yes, correct on all questions. Great questions too.

Yes, my neighbors kids playing in the pool....all summer longggggg.

@@GEOsustainable thank you for clarifying that. you have very interesting videos

@@thedanielguestservices9917 My pleasure. I am glad you enjoy. Stay tuned, I am uploading another now.

Be very careful. Silisine is a superior adhesive.