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[Martin_1962]

Having a nightmare with this, I make a mould, seal it with polish of vaseline, then the copy sticks to the master, I did use cam cover sealant for one - that sticks like nobodies business.

Any ideas please?

[Marks DTM Calib]

Silicon sealer is shite for this type of stuff.....you need some polyurethane.

[Debs.]

PVA spray-on "Mould Release".....and Poly-Urethane 'rubber' (e.g: 'flexible' potting compound) as the matrix.

[Martin_1962]

So where can I get a small amount of PU rubber from?

Have you guessed what I am trying to make?

Something black and rubbery

And will be rather good.

[Marks DTM Calib]

Sikaflex is black polyurethane

[Andy B]

So where can I get a small amount of PU rubber from?

Have you guessed what I am trying to make?

Something black and rubbery

And will be rather good.

The mind boggles!!!!        

[Kevin Wood]

So where can I get a small amount of PU rubber from?

Have you guessed what I am trying to make?

Something black and rubbery

And will be rather good.

The mind boggles!!!!        

Hmm. just check the release agent on a small area for compatibility if you're planning on using yourself as a mould.  

 

Kevin

[Martin_1962]

I have some white Sikaflex - may make the mould from that.

OK for everyone wondering.

A part you cannot get seperately whice tears and disintegrates.

3 button keyfob buttons - I reckon if I can get it right I could charge a little more for new buttons when I refurb a fob

[Debs.]

......just check the release agent on a small area for compatibility if you're planning on using yourself as a mould.  
Kevin

  Spoil-sport!