After a putty that epoxy resin won't stick to.

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oakmitre

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I'm looking for a blue tak / play doh / silly putty material that epoxy resin will not stick to.

Preferably to leave a smooth, clean release.

I'm trying to make micro usb barrel jacks using a drinking straw / micro usb jack and clear epoxy.

I need a putty I can press the micro usb connector and a drinking straw into, before pouring the resing.

Does anyone have any suggestions ?
 

Inspector

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You can use mold release available in spray cans. A little goes a long way. Some contain silicone so keep it away from your woodworking areas if you use any hard finishes.

Pete
 

oakmitre

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Thanks for the replies. I've attached some pictures of what I want to do.

The drinking straw was filled to the top with epoxy, but it leaked.

I want to push the connector ( which I have sealed the side holes on ) into some putty to seal the end. Then put the straw on the outside to mould the barrel.

The example shown works fine electrically, but I would like to make it a bit nicer. I don't want to have to cut epoxy from the end.
 

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oakmitre

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I managed to solve it.
After soldering.
Paint the socket with a very thin layer of silicone grease. Dip the socket into candle wax. Once the wax is set,push of the external wax using a cocktail stick. Rub the outside with alcohol to remove the silicone grease.

The push the connector face down into blue tac rolled thin. Push a 9mm diameter drinking straw section into the blue tac.

Then pour the resin:)
 

oakmitre

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Once the resin is set, dig out excess wax with a cocktail stick. Then dissolve out the wax from inside the socket with lighter fluid or thininers
 
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