Instructables
Picture of How To Make Your Own Sugru Substitute
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.


 
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howtopals made it!2 minutes ago

Nose piece on my glasses broke. Fixed them with oogoo. Thanks!

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Can anyone tell me what the library life is for this stuff if I make a mold for some parts I want to cast?

I was going to cast up some tyre cores // fills from this, but by the time I bought the right volumes of silicone sealant, the price of the bouncy filled rubber trolley tyres was the same.....

traceyp120 days ago

I WANT A POURABLE OOGOO ANYONE GOT THE RECIPE

Rasmis traceyp117 days ago

Comments suggest adding naphtha for a more fluid version. Which brings me to another question: What do you mean, when you write naphtha? It's quite a loose term. Is it white spirit? Petroleum? Turpentine?

Naptha..... it's the next series of hydrocarbon chains, down the series from ether.

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.Without getting into overly complex crude oil refinery issues and chemistry and fuels etc...

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Naptha - in the domestic sense, is usually called Shellite, lighter fluid, camping stove fuel, white spirit, etc.

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As it's boiling point (Shellite) is around 39*C, it is fine to use, but it evaporates very quickly and turns into vapour, making it very hard to put out, once lit.

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And the vapor will travel along the floor to sources of ignition and into places to concentrate - like basements and pits...

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This explains the issue better...

http://en.wikipedia.org/wiki/Naphtha

But just go by white spirits, camping stove fuel etc. Or if worse comes to worse, acetone - which should work, or general purpose paint thinners...

Thanks, I used this to make my radio earpiece fleshy. It isn't durable, maybe since it takes a lot of abuse in my bag and while being worn, or maybe because I mixed eyeshadow with the cornstarch to get the color.

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mircea_p123 days ago

I want to tell you that oogoo is great, but i find it difficult to add the right amount of corn stack, in order to have a non-sticky mix. An easy alternative is to mix the silicon directly in soppy-water, after 30 sec if you have water on your hands the silicon is not sticky. Check out this alternative, I try it an is amazing:

https://www.youtube.com/watch?v=C6z3_dcP1_M

Has anyone been playing with the "self-healing" properties of silicone and what one might use as a catalyst?

mikemorana1 year ago
How well does oogoo handle hardware like nails and screws once it has cured? Has anyone tried drilling holes through it?
I've got a project where I need to fit a tube through a stopper (not necessarily air tight). I'm thinking of using Oogoo to make the stopper since the glass is an odd shape and drilling a 3/4" hole through its center.
Feasible?

It's not ooogoo, it's silicone rubber that has been through reacted in the whole block at once, instead of layer reacted, through the surface.

It's a better idea to make some up and then go use it ans see how it works, and then make your own mind up.

mikey77 (author)  mikemorana1 year ago
You can drill holes through it. But they will be smaller and somewhat ragged.

A better way is to cast the hole in the Oogoo as you cast the stopper and use a 3/4 inch metal or plastic tube to create the hole. You can then remove it and replace it with a more permanent tube.

To drill a hole in rubber, get a piece of metal tubing the right size. Brass will do for Oogoo. Chuck a maneageable length in your drill, and if you can, slip a piece of something that just fits in the part that is chucked to prevent crushing. run a file or use a sandpaper or a sander to put a chamfer on the end to form a cutting edge( run the drill, hold tubing against file/sandpaper as it rotates), then cut a plug out of the rubber. the hole should be roughly the inner diameter of the tubing.

Bingo. I put holes in rubber stoppers using that exact method.

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CT42 months ago

Great Idea. There is however one major flaw that you keep pointing out with out knowing it.....the Acetic Acid. This is a killer for any electronic circuit and should not be used on any thing important. I can speak with authority on this as I encapsulate electronic circuits for a living. A client who started using our services had makes animal tracking tags that they had sealed with the silicone you are using, within 2 weeks every one of the 800 tags had failed! On opening them the circuits where green and corroded, a very expensive mistake on their behalf. We use silicone but it must be the natural cure type, this may be the GE silicone you referred to in your article I am not sure as we do not have that brand in Australia, and therefor may not work with the corn starch.

maddavo CT41 month ago

The silicone to use for electronic circuits is Dow Corning 744. It is a neutral cure RTV. It is available from Element 14 in Australia (part#1922181). It cures in the presence of moisture (humidity). I'm not sure the cornstarch trick will make it cure faster. Maybe water? But then you don't really want to get electronic ccts wet.

mikey77 (author)  CT42 months ago
You are somewhat correct.

If you use full strength silicone caulk, if it is thick enough, it will take days to set up and the acetic acid can corrode copper circuit boards in that time.

That is not what I have suggested.

Oogoo sets up much faster and in twenty four hours most of the acetic acid has dissipated. In a thin application, (.12 inches or less) the amount of corrosion on copper or solder or tin is minute and will not effect the circuit in a significant way.

Also, you can also spray paint the circuit board with spray paint lacquer before encapsulation and the protection against corrosion will be close to 100 per cent.

Hey Mikey.... you are a genius! Thanks for posting this well written instructable. Have you or anyone else found any resource for larger than tube quantities of 100% silicone caulk? I have some bigger projects that could use a gallon at a time... or or a five gallon bucket that can be resealed could work if it can maintain a shelf life after opening.

apburner2 months ago

This stuff is really easy to make. I got the material from Big Box Home improvement store and it's sister store Wally world and tried it. apparently not real critical on the amount of goo to starch I made up two batches and just put in a bunch of each and it just worked. Once you start stirring the acetic acid will become intense almost instantly. However after about 2 minutes it becomes almost no smell at all. You really have to try and smell it to tell it stinks. After a couple of hours there is no smell at all.

Well done Mikey77. Very useful ible. my picture was required but all I did was press it into a small plastic mixing cut to test the hardnest and see what is was like once cured. Sorry for the bad pic.

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danallen822 months ago

Excellent guide! I was about to buy some Sugru, then I saw your guide. You say oogoo is a more rubbery (less firm) output then Sugru? I'm looking into using it for a motor vibration damper, so it seems that oogoo is the best choice for absorbing it.

However, does it have the bonding ability like Sugru?

Anony Mouse2 months ago

If I roll the oogoo out like cookie dough, does it get to a point where it can be cut like cookie dough before it sets up more firmly?

Also, does it get solid enough while still curing so a sheet that's perhaps 1/8th inch thick be rolled out, then picked up and attached upright to an oogoo base made at the same time if I use cardboard or something to help support the upright part? And will the edges join together to make a strong solid piece?

xenor1 year ago
Some useful info for Australian experimenters having trouble finding cornstarch. I've just discovered that "Johnson's Baby Powder" is claiming to be "pure cornstarch". Should be able to pick some up at Woolworth's. I'll give it a whirl and report back.
geekgirl397 xenor2 months ago

just noting that for anyone who doesn't know, what the Americans call "cornstarch" the British and Aussies call "cornflour" - same stuff.

jmintuck3 months ago

WOW! Home made Oogoo, or home made "sugru. That is cool. If I were in my grungy old apartment with my old furniture, I am sure I would've done it for real. I am in a fancy house with the house furniture, so I can't justify doing this.But, yes, if you are adventurous, guys, go for it. I love this kind of stuff, it makes me feel less dependent on stores and shops if I were to try it and not have to $hell out $ for the regular sugru.

jleblanc10 made it!3 months ago

The chain mail casting was done with black Lepage's Polyurethane caulk. The inside of the mold was dusted with fine metallic powder, then rubbed off the high spots to give the black background.

The golf balls were slush cast Smooth-on 2 part polyurethane resin. The mother mold (stiff exterior) was made with cotton wipers impegnated with the resin.

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Tracy3662 years ago
Does anyone know how to make a mixture so that the rolled sheet of silicone oogoo is tacky once it sets up.... And stays tacky? Like to use as squares of tape to hang childrens art one the walls? Not quite as sticky as tape but tacky

I've seriously tried sex lube. Not the water based, but the silicone oil which is primarilly siloxane oil. It can make the silicone sticky like an airsoft gel target, but iirc, that was 1:1:1 ratio. Maybe if you use more. the only problem I see is that the cure time increases with more lube. The brand I found is Mood, but there are others.

gtoal Tracy3662 years ago
Could you do an experiment for us - try adding a small amount of anything that contains sulphur and see if that helps? (this is just a theory, haven't tried it myself)
Evpraxia3 months ago

Greetings,

Has anyone repaired Clark shoes with this sugru substitute? If so, what is the best way to do the repair? What ratio of silicone and corn starch should I use? Even if I am not able to repair the shoes I am Really glad to find this instructable!

welsh58boy3 months ago

Really good thank you.

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waynekamp3 months ago

I really like this and plan on giving it a try. Can you tell me if the cured product is paint-able or can be colored with a marker? I know as regular silicone it is not, but I was wondering if the addition of the cornstarch would help.

GeorgeTheJournalist made it!4 months ago

I had my eye on this I'ble for a while now, but couldn't get the silicone. It was sold out in all of the local shops, probably because of oogoo :D

It sets really quickly, even when using 1 part starch to 2 parts silicone. I used some leftover blue food coloring but I probably added it too late - it was rather difficult to mix properly.

If it's not clear from the picture, I used my first small batch to fix a cord on a laptop charger.

Thanks for this I'ble!

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Triclaw made it!5 months ago

I used it to make some throwing ribs for pottery and I have many more projects in mind for it

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achand85 months ago

This thing is very sticky, I tried soap on my hands still it didnt wash away. But using a cloth instead helped

Battlespeed5 months ago

I wonder if arrowroot wouldn't be better than cornstarch. At least in the realm of cooking, arrowroot is better than cornstarch when working with acidic ingredients (and vinegar is acid, of course) . Also, tapioca, Instant ClearJel, etc. could be used.

Have you tried deliberately moistening the starch (perhaps even creating a thick slurry with it), instead of just counting on moisture adsorbed (not a misspelling!) from the air?

P.S. The reason I ask about moistening the starch is that it would be more controllable and less subject to the exigencies of climate and weather if you could deliberately moisten or even saturate the starch with water first. I assume that if this works, you'd also use less of the starch.

mikey77 (author)  Battlespeed5 months ago

The acid does not seem to react with the cornstarch and it mostly dissipates in 24 hours.

The cornstarch produces very consistent results even in areas of low humidity. Adding more water tends to make it set up lumpy and make it harder to control an even setup.

f1dd13r5 months ago

I made some yesterday and managed to hang some pot lids up with it.

You can seal the caulk tube by removing the nozzle and laying some cling film/saran wrap over the hole, then screw the nozzle back on again to hold it there. Poke out the stuff stuck in the nozzle if there is any , so it can still be used.

jleblanc105 months ago
I have experimented with this stuff for a while, and wanted to thank you for posting it. Really handy! I also wanted to contribute a discovery. I mixed in a silicone sex lube, which is basically siloxane, and found that it lowered the durometer and extended the working and cure time. This can just soften the rubber, or if you add more, make it sticky like an airsoft target or one of those pads that sticks your phone to the car dashboard. Also, the pigments that Michael's sells for casting resin works really well.
jdgabbard6 months ago
Very impressed with this writing. I've been looking for an affordable substitute for use with Legos cases for electronics. And I think this should do well. Thanks!
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