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I call it Oogoo, an inexpensive silicone clay that is easily made. It can be used as an excellent substitute for Sugru. It can be hand molded or cast in forms. Or, it can be used as a casting silicone. It can be colored any color from white to black. It can also be made translucent to allow diffused light to shine through. It can even be painted on in thin layers. It has very good adhesive qualities and will stick to itself, glass, fabric, paper, wood, and some plastics and metals.

This instructable will show :

1- How to mix and color Oogoo

2- How to cast it or hand form it into different shapes.

3- How to make silicone paint

4- Several interesting uses for Gorilla tape and Gorilla Glue, see steps 3, 7, 12 and 15.

5- How to make a few projects using Sugru and a comparison of Oogoo and Sugru


Since I am mainly interested in using Oogoo to embed electronic circuits in flexible forms, this instructable will also show you how to:

1- Make a soft circuit LED pumpkin head robot display that can be embedded on to clothing.

2- Make cleanly etched conductive fabric circuits

3- Make conductive glue using Gorilla glue.

4- Embed circuits in Oogoo or Sugru


The intro pic shows a few of the silicone shapes that I made using Oogoo and a funky, smirky, flexible pumpkin head robot LED display.


Step 1: How It Works

pic2 shows a 2"x2"x2" solid silicone cube that cured enough in two hours to be removed from its plastic box form.

For years I have been looking for an inexpensive way to create a flexible skin covering for robots and electronic circuits. I have tried several kinds of casting urethane rubber and silicone rubber. They all have their difficulties and either set up to fast or too slow. They are too thin or they are too thick. They are also very expensive in small quantities. Added to that is the problem that they have a very limited shelf life and usually must be used within six months. Sugru is great, but it is not affordable for making larger structures.

I and many others have tried using the inexpensive silicone caulk that is readily available from hardware stores. It is used to seal roofing and glass windows. It works fine but has the problem that it can only be used by putting it on thinly and waiting a long time for it to cure. It is also hard to work. It must be smoothed immediately while it is very sticky. Otherwise, the surface cures quickly and then forms a gummy film while the inside remains soft and wet. It has a smoothing time of seconds rather than minutes. If you put it on too thick the inside will remain soft and can take several days to finally cure. People have tried all kinds of additives in an attempt to make it cure in a more useful manner. I have found those additives to be unusable for my purposes.

So I wanted to add a catalyst that would help the silicone to cure from the inside out rather than just from the outside in.

As I understand it, 100% silicone caulk works by the moisture in the air initiating the polymerization of the silicone. So it cures from the outside in and as it does, it allows the water vapor to slowly seep inside and eventually cure the unexposed silicone. While it cures, it gives off Acetic acid (vinegar is diluted acetic acid) which is the strong smell you will notice if you use it.

I experimented with quite a few additives to try and introduce some moisture into the uncured silicone. Several of them worked to some degree, but the hands down favorite was also the least expensive.

It turns out that corn starch is highly absorbent and when sitting around in an open box it will absorb moisture from the air. It is an extremely fine powder that diffuses evenly in mixtures. By adding the right amount of corn starch, the sticky silicone is somewhat stiffened and very quickly starts to set up from the inside out. While it still sets up faster on the surface than in the middle, the whole thing will set up in five minutes to 2 hours no matter what the thickness. The actual curing time depends on the temperature, the humidity, the amount of corn starch added, and the speed at which it was mixed.

So that's it. Oogoo is corn starch and clear silicone caulk mixed together and then molded by hand or by forms to create just about anything you can imagine that needs to be adhesive initially and solid yet flexible when cured.


<p>Hey, does anybody know if I could remove this? Real sugru apparently comes off if you need it to, and I'm planning to attach some sugroo/oogroo to my locker, but it can't be permanent. Does anybody know?</p>
I made a cord snap keeper and the edge of a white IKEA lack shelf. When I was done. It did not come off &quot;easily&quot;<br><br>
<p>I have more trouble keeping it stuck than removing it.</p>
<p>i do not know. but try this on a piece of metal then try different ways of taking it off.</p><p>For hot-melt-glue i use rubbing alcohol (RA) and tweezers. i close the tweezers then dip the point in the RA, then press the tip where the glue meets the metal. the RA then flows between the glue and the metal, separating the two.</p>
I've been looking for a compound that i can use for gap filler on a pair of &quot;frankenboots&quot; i made. The soles dont quite match up with the upper so i need something that can fill in the gaps but, will remail flexible, and that will be water repellant. Has anyone used oogoo for anything comparable?
Based on what I just made, this will be perfect
Sugru SHELVING brackets hold weight; I'm wondering if anyone has experience with Oogoo to hold a SHELF?
<p>I haven't had a lot of success with this stuff sticking. I've tried using it like a rubber shield on several objects (thermos bottles, car keys, keychain lights, etc.) and it always lets go a lot easier than I'd prefer. In the picture is a bumper I made for a battery bank. Those holes are where neodymium magnets were stuck. They held for about a week of use before I started finding them stuck to each other instead of the battery. In this application, it's held onto the plastic case quite well. Not so much, the car key, bottles, etc.</p>
Maybe try embedding he magnets in the material, so the oogoo surrounds them completely , also maybe less cornstarch to silicone willake it stickyer
<p>Thanks for doing all the research and providing these instructions. I'm going to start experimenting with it for various applications. Has anyone tried using reclaimed copier toner as a colorant? </p>
<p>maintenance man tip use a sheet rock screw or other screw to seal the end of your caulking tube just slide it in and any caulk that dries will cure to the screw and pull out for your next use </p>
<p>Once the caulk-type tubes of silicone are opened, they will cure internally and become useless in a short time. If you have a food-saver type vacuum sealer, the tube can be sealed inside and will last much much longer. Even the low priced hand pump version will increase the shelf life of the unused silicone. The gallon size bags are difficult to find locally, but I checked Amazon and they are available there.</p><p>It's also possible (but not tested) that any unused oogoo left over could be saved in a vacuum bag.</p><p>If you use the hand pump vacuum bags, add a piece of adhesive tape on the vacuum flap of the bag to ensure it doesn't accidentally release and let air inside.<br></p>
I've used abig 'glob' of Vaseline on the end. It has worked really well. Also used a ball of polymer clay pushed on the end.
<p>&gt; It's also possible (but not tested) that any unused oogoo left over could be saved in a vacuum bag.</p><p>My bet: t's not gonna work very well - any moisture in the corn flour is going to trigger polymerisation - this is why you have shorter cure times even when the molded objects are massive.</p>
<p>I can see that might be the case. One would then expect that the suguru stuff doesn't use a similar method to catalyze. There probably isn't much moisture in the cornstarch until it is opened. After that, all bets are off.</p>
<p>&gt; There probably isn't much moisture in the cornstarch until it is opened</p><p>Up to 15% cf </p><p>https://www.law.cornell.edu/cfr/text/21/137.211</p>
<p>Great tip and useful for so many bags that I use, hoping that the zip will be good enough. I get the air out by rolling up the bags tightly, if possible, and then zipping them shut, and it fails pretty often. Thanks so much for such an easy fix.</p>
I'm loving Oogoo. Getting older and am making 'handles' for all sorts of tools and utensils. Ready to experiment with making a more liquid product so I can pour molds. One observation - when molding by hand, dipping your hands in cornstarch makes it easier to smooth the Oogoo. <br><br>One question - could you mix the ingredients in a closed ziplock bag?
<p>Has anyone tried (not for food safe) FlexSeal as seen on TV and or using Undercoating and mixing that with cornstarch? I am not sure if FlexSeal can be had in clear or not that you could color on your own. But since they both come in cans that would be storage problem solved.</p><p>c</p>
Can this be used to serve food or water off? How toxic is it?
<p>Dear Mikey77 and all of the helpful commenters here, thank you! This stuff is the bomb! My husband and I have been using it for 4+ years to make relief sculpture molds for our costumes. Over that time we've refined the method specifically for this purpose. Many artists ask us how we do it , so we just made a pdf booklet called &quot;Oogoo for artists&quot;. Check it out here</p><p><a href="http://organicarmorarts.com/product/oogoo-for-artists-book/" rel="nofollow">http://organicarmorarts.com/product/oogoo-for-arti...</a></p>
<p>Dear Truffula,</p><p>Mikey77 was kind enough to share a wealth of knowledge for free but you chose to use this forum to sell yours. Why?</p>
<p>Ubobi, because Truffula has self-respect for her own value as a human being. Try being dirt-poor for years doing nonprofit work before you criticize others; it gives one perspective. Society is not entitled to my labor; I am not a slave. Neither is Trufulla. </p><p>Don't pretend otherwise.</p>
<p>JoeE40, you may have misunderstood my comment. I am not criticizing Truffula or anyone else for that matter, to sell her wares. My point is simple that this is not the forum. </p><p>Thank you for your thoughts.</p>
<p>Hmmm... I was looking at pic #11, and it reminds me of the sole of some flip flops. Have you tried making anything like that, as in repairs to shoes, flops, or even furniture feet (yeh - I don't know why that came to mind, there, lol). When you blow out a flip flop, and don't want to throw out your favorite ones, just because one of the plugs won't stay in, I wonder if you could do it with the oogroo... I'm just unsure of the durability, in those types of repairs, and such.</p>
<p>It is way stiffer than the foamy flip flops I grew up with. As for furniture... well, I've used it with some success as keyboard feet, phone charger feet, etc.</p>
Cool, thank you! I've used it (based on your ible) to repair cords attempting to separate from their appliance, and as a bathtub drain plug. Thank you so much for this ible- I often have new ideas for it, &amp; frequently find myself wondering 'I wonder if oogroo would work for this...'

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