Molding and casting

[erospawn]

(12-23-2009, 12:59 AM)modelnutz Wrote: ero...if you are still having the same problem ( rubber not curing against the master but curing everywhere else ) you may be experiencing something called "inhibition"....this is where the rubber is reacting to the material in the master causing it to not cure.
The only option is to seal the master .
Some sort of clear coat ( Krystal Kleer, future, clear coat..etc. ) should do the trick.

Platinum cure rubbers suffer from this issue quite regularily.
It's also the reason we use sulfer free clays in sculpting and mold work.

hey thanks.. I just needed "greeblie" peices for the sensor array details on the main master.. So, I figurd these would be a good start to learn with.. so, basically, they are just plastic peices from a model kit .. So, maybe its reacting with the material ..

Cobra, thanks for that info as well.. Unfortunately, the master has been sprayed with Enamel paint.. However, I think Smooth-on sells a sealer though..