SUGRU
by John
Yet another acronym for my non responding brain to memorise?
No, Sugru is a new product, a self-setting rubber compound, which I tried after seeing a description in “Model Engineers Workshop”.
It is described as being adherent to many materials, including metals, glass, wood, fabrics, plastics.
It remains tough and flexible after curing.
Cures at room temperature.
Mouldable by hand. Waterproof. Electrically insulating. Temperature tolerant -50to +180 centigrade. UV resistant.
Available in various colours. I ordered black. Got 3 small sealed packets of 5gm each. Cost ~$au20 inc postage.
Once opened, the material should be used within 30 minutes. Cures within 24 hours.
Shelf life about 1 year, three times longer if kept in the fridge. (seek medical advice if swallowed)
So I tried it, and it looks good. Handles like slightly sticky PlayDoh. Washes off the finger easily.

The before. This the Z axis stepper motor on my Boxford CNC lathe. The lathe is 30 years old, so it is not too surprising that the plastic cable coating is becoming stiff and peeling back.

The after. Looks good?. I will report how it stands up to constant movement and flexing in a few weeks.

Another after. Once the sealed packet is opened, I presume that the Sugru sets. So I applied some to the X axis cable.
Sounds a bit like Milliput http://www.milliput.com/ but uses air to start the curing process, where milliput is more a traditional 2 part epoxy (and can set underwater, and be used for things like radiator repair).
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Just read on the packet that it is self curing rubber – that is definitely a point of difference – milliput sets hard.
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