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Step 5Walk away
I have a tendency to fiddle with the mold, hoping to improve things as it cures. This doesn't often work to my advantage. The more fiddling you do, the more chance you have at screwing things up. What you should do is vibrate the table the mold is on to dislodge bubbles for a few minutes, and then go somewhere and read a nice book. You should let the mold do it's thing. When the silicone is cured (this will vary depending on the manufacturer) come back and take another look.
If all goes well, you should be able to simply flip the part over, take off the clay, and pour the second half. For me, that meant cutting the bottom off of the mold container (the paper mixing bucket) and turning the whole thing over. Remember to apply a generous coat of sealant. I use Smooth-on SuperSeal spray. It requires two thorough coats spaced twenty minutes apart. Check for bubbles in your sealant, smooth them out with a soft brush if there are any.
Mix and pour again.
If all goes well, you should be able to simply flip the part over, take off the clay, and pour the second half. For me, that meant cutting the bottom off of the mold container (the paper mixing bucket) and turning the whole thing over. Remember to apply a generous coat of sealant. I use Smooth-on SuperSeal spray. It requires two thorough coats spaced twenty minutes apart. Check for bubbles in your sealant, smooth them out with a soft brush if there are any.
Mix and pour again.
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