Here's a product that looks like Dragon-Skin, but isn't quite as soft and doesn't stretch quite as much.
This is more a mold making rubber and less an FX rubber, but if you're looking for a 20A hardness, here it is.
This is indeed good stuff.
Smooth-Sil 920 will set up in about 20 minutes and be ready to demold in about 4 hours.
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