Silicone caulk be hacked into all kinds of useful things. This adhesive has the unique qualities of sticking well to some things and not others. This makes it easy to cast into many shapes. If you add corn starch, it can be cast or formed or glued into shapes of any thickness and it can set up within an hour. I call this mix Oogoo.

This instructable shows how to fix or make seven things:

Step 2- Make heavy duty rubber bands

Step 3- Make your own custom erasers

Step 4- Make a wallet pen

Step 5- Make a hot pot gripper

Step 6- Fix a broken bucket handle

Step 7- Make liquid tape to insulate splices

Step 8- Make a thread locker for nuts and bolts

Step 1: How It Works

Oogoo is a mix of 100% silicone caulk and corn starch. The corn starch evenly distributes moisture which it has absorbed from the air. This helps to activate the polymerization of the silicone in a controlled way. So, unlike regular caulk which can take days to set up, Oogoo can set up in an hour or two no matter how thick it is cast.

For these projects you only need a few materials:

Puffed Rice

Corn starch

100% silicone caulk-the type that smells like vinegar and has no acrylic or latex additives. The newer silicone caulks that have a different smell such as GE silicone II will not work for this.Available from Walmart or the dollar store for about $3.

plastic cups

plastic bag

Nitrile gloves

1/16" and 1/8" thick plastic sheet material. PVC, polycarbonate, acrylic or any other plastic sheet material can be used. Plywood sprayed with lacquer can also be used.

Spray Lacquer from hardware store.

Naphtha or Turpentine solvent from hardware store

Artists oil paint (optional)

The Standard Oogoo Mix
The standard mix of Oogoo consists of 2 silicone caulk to 1 corn starch by volume. It is usually mixed in small quantities so that it can be formed or cast before it starts to stiffen up. I will typically mix no more than 3 tablespoons of silicone caulk to 1-1/2 tablespoons of corn starch. For more details on mixing Oogoo see here: https://www.instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/

WARNING: While mixing, Oogoo will give off the strong smell of Acetic acid which can be irritating to the eyes and respiratory system. I strongly recommend that the mixing and forming be done outside or in a VERY WELL VENTILATED room. You should also wear nitrile gloves while mixing as the uncured silicone contains other solvents that might be absorbed by the skin.
Could one make cookie cutters or a pan out of this? Is it bad to use with food? Yes, this is probably a dumb question but I'd like to know.
Yes, it is bad to use for food. <br> <br>While it is setting, it gives off acetic acid which you do not want in contact with food or human skin. Do not mold it directly on human skin. <br> <br>In addition to that, most 100% silicone's have anti-fungal additives which can be poisonous. Not good for food, even after it is set up. <br> <br>There are food safe silicones that are available from Smooth-on or other companies.
<p>100% Silicon does not have any fungal additives, that is why its 100% Silicon. You're thiking of Caulk. </p>
<p>this isn't true, unfortunately; most tubes containing 100% silicone have ingredients that make them unsafe for use around food and aquariums</p>
<p>100% Silicon is food save after its fully cured, but its not cooking safe. You can use it for jello molds or ice molds, but nothing hot. </p>
<p>There is aquairum safe silicon that would be safe to use with food since fish are very suseptable to toxins. Now baking purposes I would not venture through. </p>
<p>For food-grade purposes you probably want to look at something like Silicone Plastique - check out http://www.makeyourownmolds.com</p>
<p>I would really like to know if one could make silicon muffin cups with this. (like the expensive ones you can get at bed, bath, and beyond)</p>
mikey77, <br>have you found any additives which will make the resulting oogoo harder and less stretchy without decreasing its strength?
I'm going to be doing some experimenting with different additives and mixing methods this weekend to try to make the oogoo harder and more abrasion resistant. It would be nice to have some idea where to start, though. I'm thinking some fillers might help. I'm going to try fiberglass and some nylon filents, maybe some powdered something or other.
Hi mikey77, I've been having trouble recreating your recipe, using eraser mix 1. I think I've gotten all the proportions right, but it never hardens such that it immediately crumbles when dry. Do you have any recommendations? Thanks!
I have a huge bag of Diatomaceous Earth that I had no idea what to do with...now I know, time to make some cute erasers! Thanks can't wait to try it =D
Good stuff, as always... <br>Went to the Blog: <br>http://faz-voce-mesmo.blogspot.pt/2013/07/super-brittliv-e-7-coisas-para-fazer.html
hi mikey77, <br> <br>your Oogoo saga continues to inspire and amaze me, real great work youve shared with us here, thoroghly impressed with all the additives we now can add to make Oogoo even more excellent than it already is ! <br> <br>I needed the red-oxide info for making fire-retardant parts in and around my RC buggy's engine bay and the graphite to make Oogoo conductive is sheer brilliance !!! <br> <br>Two Questions though, ive been trying to make liquid electrical tape but failed a few times using solvent, just paint thinner, but would you be able to offer some solvent names/brands that you know would work to make liquid tape, and also if kept in an air-tight container would this mix be stable enough to keep for long periods of time without solidifying ?!? <br> <br>Many thanks in advance for the help and another huge round of thanks for sharing this awesome invention !
Toluene and Acetone work well as solvents for Oogoo or silicone caulk. Toluene evaporates faster than the Acetone losing its odor in about 24 hours. <br> <br>Oogoo dissolved in a solvent will set up in one to three days in an airtight container. Clear silicone caulk in a solvent will set up in several days to a week in an air tight container. <br> <br>So no, none of this will keep for long periods of time. It is usually faster to simply mix small batches at a time. <br> <br>Hope that helps.
AWESOME !!! <br> <br>I have some Acetone !!! Somewhere lol ! <br> <br>Thanks so very very much for your help, really appreciate it !
I used Oogoo to prevent breakage of glass vials i use for storage/camping. The coated vials have repeatedly survived falls of 5+ ft. on to cement floor. Thanks. <br>http://www.flickr.com/photos/52087685@N00/8127990037/
I wonder... wouldn't it be A LOT easier if you just carved a normal eraser to the shape of your choice, then put a hole in it for the pencil, and used the oogoo mix to just stick it to the end of your pencil??? Just saying...
Good point. <br> <br>It is always a valid question to ask if high-tech techniques are more efficient or useful than hand techniques. In many cases, they are not. <br> <br>There are many forms that are difficult, if not impossible to hand carve. There are also many forms which are difficult, if not impossible to cast or mold. <br> <br>Making your own erasers was meant to be fun. Giving the possibility of creating erasers, or something more, that you or I have never seen. <br> <br>You and I can easily hack exiting erasers, or perhaps, with somewhat more effort, create something entirely new.
love it
I made a bouncy, functional Rubik's Cube with it (and sugru). It worked surprisingly well.<br> <a href="https://www.instructables.com/id/Bouncy-Rubiks-Cube/" rel="nofollow">https://www.instructables.com/id/Bouncy-Rubiks-Cube/</a><br> <br> Thanks for sharing such a great invention with us.
You are welcome. <br> <br>I added your link to step 9.
Keep 'em comming! <br>It's Link is gone to my Blog, along with a lot of other good stuff: <br>http://faz-voce-mesmo.blogspot.pt/2012/09/skate-electrico-razorlabs-no.html
I've already made some Oogoo to repair something (I forgot what) but I didn't know it was so versatile. Thanks for the heads up...
This is so cool! I love seeing the versatility of Oogoo. These ideas are absolutely fabulous!

About This Instructable




Bio: I believe that the purpose of life is to learn how to do our best and not give in to the weaker way.
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