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#1
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Silicone Storage
I just bought some Smooth-On Mold Max Tin based silicone rubber. Since I won't be using it all up right away I'm wondering what would be the best way to store the unused portion. I'ts pretty warm in my studio so I am planning on putting it in the bottom part of a refrigerator.
Has anyone tried this or think it might work better than keeping it in a warm room? |
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#2
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Re: Silicone Storage
Is this product anything like the tube silicones that you can buy in hardware stores? (RTV = room temperature vulcanizable). Over the past 25 years, I have yet to se any of that which didn't polymerize with disuse. I'd be looking for applications to use it all.
Since it won't stick to wet, soapy things, negative replicas of bark, wood & concrete look nice. |
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#3
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Re: Silicone Storage
As far as storing unused silicone and curative, sometimes placing these things in a cold environment can be more detrimental than leaving them in a warm studio. For the base (part A) it won't care how warm or cold it may be. Over the long term (we're talking a year or better) this component may become "structured" meaning that it may get thick. Generally if this is the case, a high speed mixer will bring it back to square one. For the catalyst (part B) you may have more or a problem. Keeping this material in a tightly sealed container is probably about as good as it gets. It may form a bit of a precipitate in the bottom of the container; if this becomes excessive you may want to get fresh catalyst. Otherwise, I would just keep it out of the light and in the room on a shelf. Avoid the refrigerator for this stuff as it may cause the reactive component to crystallize at the bottom of the liquid. You can sometimes rejuvenate the material by warming but if you can avoid this I think you will be better off.
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#4
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Re: Silicone Storage
I get my polyurethane rubber from PolyTek online and they have a product called Poly Purge which you spray into the cans of Part A and B and it lays down a blanket of gas which helps to keep air away from the material extending its shelf life. Maybe Smooth-On has something similar.
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#5
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Re: Silicone Storage
I use Smooth-on Rebound25 and I had two opened gallon containers with half a gallon of rubber left in each sitting around for a good year with only the lids pressed back on them, I just used it up last weekend and it was perfectly fine.
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