food grade silicone

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food grade silicone

Postby jman69 » Sun Apr 21, 2019 6:36 pm

Went to bunnings today looking for silicone. They have Sellys' 401. Is this one suitable for sealing my lid to my pot and m,y colum to my lid? I will be making my own gaskets.
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Re: food grade silicone

Postby db1979 » Sun Apr 21, 2019 8:59 pm

I'm pretty sure the forum doesn't recommend this approach.

Found this on selleys' website:
Screenshot_20190421-205051.png

If selleys don't recommend it for continual contact with food then I don't think it'd be good for a still.

One option for a custom gasket is a ring of cardboard with lots of layers of plumbers tape. Just use the white tape, not the pink.
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Last edited by db1979 on Sun Apr 21, 2019 9:01 pm, edited 1 time in total.
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Re: food grade silicone

Postby Wobblyboot » Mon Apr 22, 2019 11:28 am

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Re: food grade silicone

Postby Plumby » Mon Apr 22, 2019 1:18 pm

db1979 wrote:I'm pretty sure the forum doesn't recommend this approach.

Found this on selleys' website:
Screenshot_20190421-205051.png

If selleys don't recommend it for continual contact with food then I don't think it'd be good for a still.

One option for a custom gasket is a ring of cardboard with lots of layers of plumbers tape. Just use the white tape, not the pink.

:text-+1: exactly what I use for my gasket
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Re: food grade silicone

Postby jman69 » Mon Apr 22, 2019 5:32 pm

Thanks fellas, think i'll try the cardboard and tape metho. Play it safe.
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Re: food grade silicone

Postby db1979 » Mon Apr 22, 2019 6:27 pm

Good idea. I had one that lasted me ages, in fact it's still going, I just don't use that still anymore.
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Re: food grade silicone

Postby Amberale » Mon May 06, 2019 8:55 am

How about cutting them from one of those BBQ liner sheets of silicon?
It’s gotto be food grade if it is designed to cook food on.

AA
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Re: food grade silicone

Postby taffy4x4 » Mon May 06, 2019 10:35 am

Hi, I used Dow Corning rtv to make the lid gasket on mine as we use the stuff for food equipment where I work.
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Re: food grade silicone

Postby Plumby » Mon May 06, 2019 4:45 pm

Food safe or food grade DOESN'T MEAN ALCOHOL SAFE. Alcohol and alcohol vapour are a solvent and will dissolve pretty much everything except for ptfe tape and epdm gaskets. As said b4 you can make your own gasket with a ring of cardboard and ptfe tape, ( Google search never ending gasket ) or bite the bullet and buy a gasket from 5 star. Your liver and kidneys will thano you in the years to come
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Re: food grade silicone

Postby Amberale » Mon May 06, 2019 8:16 pm

Plumby wrote:Food safe or food grade DOESN'T MEAN ALCOHOL SAFE. Alcohol and alcohol vapour are a solvent and will dissolve pretty much everything except for ptfe tape and epdm gaskets. As said b4 you can make your own gasket with a ring of cardboard and ptfe tape, ( Google search never ending gasket ) or bite the bullet and buy a gasket from 5 star. Your liver and kidneys will thano you in the years to come


:handgestures-thumbupleft:
Got them.
Use them.
Ordering more for spares.

I’m just curious about whether the stuff is any good.

I’m definately not squeezing anything out of a tube into the rig.
:)
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Re: food grade silicone

Postby Wobblyboot » Tue May 07, 2019 5:42 pm

Plumby wrote:Food safe or food grade DOESN'T MEAN ALCOHOL SAFE. Alcohol and alcohol vapour are a solvent and will dissolve pretty much everything except for ptfe tape and epdm gaskets. As said b4 you can make your own gasket with a ring of cardboard and ptfe tape, ( Google search never ending gasket ) or bite the bullet and buy a gasket from 5 star. Your liver and kidneys will thano you in the years to come

Isn’t silicone better than epdm gaskets? https://silicone.co.uk/news/silicone-rubber-vs-epdm/ which is what 5star gaskets are made from? I need to make a silicone gasket so researching which to use, not all seem the same.
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Re: food grade silicone

Postby bluc » Tue May 07, 2019 6:38 pm

Lots people use silicon, silicone epdm and ptfe(teflon). The filler in cheap silicone is the problem That's why 100% silicone is what you want. You can get it in a tube and is what is used on fish tanks or a two part substance often used for moulding stuff or people use silicone baking mats. Plenty builds on here use gaskets cut from baking mats

Think it's also called non acetic cure silicone
Last edited by bluc on Tue May 07, 2019 6:40 pm, edited 2 times in total.
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Re: food grade silicone

Postby Amberale » Tue May 07, 2019 8:33 pm

Thanks Bluc.
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Re: food grade silicone

Postby Magnus » Wed May 08, 2019 6:33 am

I had some EPDM seals go all sticky after long term use, they were starting to break down so I switched to all silicone seals and they are all still in the same condition they were when new.
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Re: food grade silicone

Postby woodduck » Wed May 08, 2019 7:06 am

Beware of the cheap baking mats, they have something else in them. Best way to check is to fold the mat sharply and see if the fold turns white. If it does it's no good.

You will be finding it hard to get a straight answer here because not many have ever used a tube of silicon for their still because it's risky. Not many are willing (rightfully so) to take the chance on something that's not proven. To be honest if your keen to try you'll need to do some trials to see what works by testing it in high % alcohol for a decent amount of time, say 2-3 weeks. The silicon would need to stay unchanged in that time for me to be comfortable using it.
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