While ordering the latest batch of toys components from SparkFun, I noticed something new — a 12-pack of moldable, air-curable rubber called Sugru. The description said that it could be used for all kinds of hacks, repairs, and inventions. It looked interesting, so I picked up a pack to try out.

The Sugru sample pack.


Opening the pack, I found twelve packets in various colors, two sets of Sugru stickers, and a mini instruction manual.

The contents of the Sugru sample pack. (Click for larger.)


Opening up a blue packet, I found the Sugru material quite a bit tackier than I’d expected. It’s like a mix of modeling clay and Silly Putty, and seems to want to stick to everything.

Sugru in its native habitat. Now I know why they recommend cutting through three sides of the package to get at it. (Click for larger.)

I initially tried making a D4 (tetrahedron), but wasn’t able to form the shape accurately, since the Sugru stuck to the desk. (It sticks to everything.) I then split it into four pieces and formed “feet” for the SIGMA walking robot.

The robot with its feet in the air, waiting for the Sugru to cure. (Click for larger.)

A closeup of one of the robot's new Sugru feet. (Click for larger.)

A couple of days later, the Sugru had cured nicely into a rubbery form, and the robot was ready to try out its new shoes.

The SIGMA robot's new Sugru shoes. (Click for larger.)

I’m still figuring out what I’ll use Sugru for, but it does seem to work well for various types of small mechanical hacks — basically, any place you’d like to be able to put Silly Putty and have it cure into a waterproof rubber-like substance over a day or two.

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