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None of the products, protocols or methods here have been approved by Jim Humble. This is the research forum and was set up for those wanting to discuss and experiment with MMS, and new complimentary technologies. Any experimentation that you personally do is at your own risk. Before anything is submitted for approval it must be first approved by Jim Humble in writing and posted under his account. The main source for approved material, protocols etc, is in Jim Humble's latest book at www.jhbooks.org Each person using this Forum is considered to be completely responsible for themselves and their own personal health. Any experimentation that you personally do is at your own risk.
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Silicone rubber problems 23 Aug 2021 11:58 #70609

  • Andy in Hawick
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I am using Andreas Kalcker's method of producing CDS in a Kilner jar with a shot glass for the reagents. I have found that the clear silicone rubber sealing ring seems to absorb some of the ClO₂ gas; it turns yellow and also sticks to the glass.
Have others experienced similar problems?
I know that ClO₂ attacks or dissolves natural rubber, which is the only other type of seal that seems to be available.
What solutions have others found?
I am contemplating cutting a gasket out of cardboard (as is used in other situations including motor engines) but will that be gas tight enough?

Andy suggestions?

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Silicone rubber problems 23 Aug 2021 19:02 #70617

  • CLO2
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Yes, silicone rubber will stain yellow from CLO2 gas, but it disappears when not in contact with the gas. Been using it for years with no problems. 

BTW, that method of making CDS was not developed by Andreas Kalcker, I did. In 2012 and 2015.  mmsinfo.org
The following user(s) said Thank You: JimH1954, Andy in Hawick

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Silicone rubber problems 23 Aug 2021 20:06 #70618

  • Andy in Hawick
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Thanks CLO2 and apologies for omitting to point out that the methodology that I learnt from Andreas Kalcker was developed by you.

How do you get around the sticking of the gasket to the glass? I find that I have to pry the rubber off the glass, which is tedious and I feel that it risks damaging the seal. Is there anything that can be smeared on the surfaces to avoid this?

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Silicone rubber problems 23 Aug 2021 21:15 #70620

  • Truthseeker
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I used the same method with these jars and had no problems with sticking and the silicone seal did not appear stained or impacted in any way at all.

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Silicone rubber problems 24 Aug 2021 06:35 #70622

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"How do you get around the sticking of the gasket to the glass?"

Sometimes I notice a little stickyness to glass, but not much and easy to pull apart. On some of the bento boxes in which I make CDS, if the lids have been on a long time, like days, then it takes some prying to get the seal to release from the glass. 

You can buy silicone oil, even food grade. That might help. I use it with syringe plunger pistons and find only a tiny drop spread on with a finger is all that is needed. 

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Silicone rubber problems 13 Sep 2021 13:37 #71092

  • Andy in Hawick
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Hi CLO2

I tried applying some silicone grease and found, if anything, that the gasket was stuck even more securely to the glass rim. I then cut a cardboard gasket (using the silicone one as a template) and trimmed it until it fit onto the lid. (This was cardboard from the back of a pad of paper; solid, untreated card, about a millimetre thick.) I have now made a batch of CDS4000 with the cardboard gasket in place. The gasket did not stick to the glass at all, there was no evidence of significant gas leak and the CDS seems fine as expected.

That seems to be a satisfactory solution to the silicone gasket problem!

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