You can work it in your fingers like modeling clay, but in about 12-24 hours it cures into a hard rubber.
The only thing I don't like about Sugru is the cost: $2.45 for a 5 gram packet or $.45 per gram. 5 grams is about 1/5 cubic inch.
Power Plug on Fun Cub
The power plug on the Fun Cub has more bare wire showing than I would like and the way the wires fold into the canopy have the potential to put strain on the wires where the enter the plug body.
High % Isopropyl Alcohol
High percent isopropyl alcohol is my favorite cleaning agent on nonporus surfaces prior to applying adhesives or anything else that I want to stick well.
Note that I refill this spray bottle w/ 90% alcohol from the grocery store. It is much cheaper that the 99% that originally came in the bottle and it works as well for this purpose.
Drying the Connector
Using canned air to dry the alcohol prior to applying the Sugru.
Molding the Sugru
The working properties are somewhere between modeling clay and silly putty.
Strain relief partially formed.
Continuing the forming process
Sugru, like modeling clay, is very difficult to control to the precision that many of us like on our models. I found I had to accept the material for what it is and give up on making it perfect. It looks OK and performs a function.
Finished Strain Relief
Finshed piece, ready for use after cure. Will do the other side when I have a use for the rest of a pack of black Sugru.
Note that Sugru has a 6 month shelf life which can be extended by storing the sealed packet in the refrigerator.
Have you seen my packets of Sugru? - No, but I did throw away some packets of spoiled condiments that were in the refrigerator...
Once you open the packet, you should use the entire packet in one session. I placed an open packet in a sealed bag in the refrigerator overnight - it was unusable in the morning.