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I'm considering a MYOG gravity filter project but I'm not sure where to find out if Sil Net™ can hold up under long term submersion and won't leak toxins into the water.

Is it safe? Do you have a reference? Got any tips on the DIY filter project?

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  • silnet is basically silicone with a few extra things to make it easier to apply. You can use bathroom silicone joint, I would expect that one to be safe (not sure how you can make sure of that though). The question is whether it will adhere to your filter.
    – njzk2
    Commented Dec 19, 2016 at 15:07
  • I learned that tile adhesive typically has a toxic fungicide. You can get NSF approved food safe silicone sealants. I need to come up with a good solvent to use too. Perhaps a high proof ethanol.
    – D. Patrick
    Commented Dec 20, 2016 at 4:50

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I emailed Gear Aid, the company that makes Silnet. They didn't say it was unsafe but they did say they haven't tested it for that.

They recommended I go with a food safe adhesive. I'll probably look into that; however I'm not sure if silnylon is impregnated with non-toxic silicone either.

We’ve not used or tested it in the manner you are describing. You would do better with a food safe adhesive for your project.

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  • I appreciate feedback quite a bit and I don't mind a down vote, but a comment explaining why would be helpful please.
    – D. Patrick
    Commented Dec 20, 2016 at 4:51
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    I wouldn't trust silnylon to be completely food-safe either. I would try to find a specifically food-safe material first, and then the sealant that works on it.
    – njzk2
    Commented Dec 20, 2016 at 15:01
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    Agreed. In fact, not all nylons are food safe, even if it isn't silicone impregnated. This whole project may be over my head. I may stick to DIY gear where everything stays on the outside of my body.
    – D. Patrick
    Commented Dec 20, 2016 at 15:05
  • those guys: wazoodle.com/fabrics/food-safe-fabrics have food safe fabric. can't find any sealant yet though.
    – njzk2
    Commented Dec 20, 2016 at 15:13
  • I think I could seal the seams with this: Clear Food Grade Silicone Sealant - 10.2 Oz Cartridge amazon.com/dp/B005XP5HO6/ref=cm_sw_r_cp_api_sUuwybENA01P7
    – D. Patrick
    Commented Dec 20, 2016 at 15:18

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