https://www.danco.com/product/0-5-oz-silicone-faucet-grease/
$4.50 at any hardware store. Flashlight o-rings is even one of their suggested uses.
The ultimate? Probably not.
But I’d dare wager that a typical household faucet sees the type of duty cycle, and a need for water-tightness magnitudes higher than any of our precious flashlights.
I use 760G as well, it’s not meant to be slightly yellow right?
Squeezed a load out to fill a syringe and it looks kinda straw coloured and was rather thick. Thinking it might be old or dried out but it still fluoresces.
I have mine from several years and is pure transparent
That’s annoying then. It still lubricates very well but is a bit thicker (not sure if that’s a good thing, but it does mean applying it is a bitmore difficult)
I don’t know why it can be more thicker but if don’t break the o-ring it would be good
brightlumenshop.com has the small tubes of Nyogel 760g
I made the mistake of getting a 100g tube of it lmao
Unless you have hundreds of flashlights and relube all of them every week, this tube is bound to be inherited by your grandchildren 
Yep, I saw they resell the ones from Armytek. If they were in China I would have bought it already (having great luck with stuff sent from China as of late), but they are in the US and shipping from the US to my current location is more complicated.
For those wanting even smaller quantities than 5ml, or wanting to experiment, I just stumbled on this gentleman selling multiple 1-gram “samples” of not only Nyogel 760G, but also literally dozens of others both from Nyogel and other brands for $4/gram , and mentions “free shipping” in the description (albeit eBay calculated $4.28 shipping when I presented an FL zip code), and even offers “free phone consultation” to help you with the choosing: Nye Rheolube, Nyogel, Flourocarbon Gel, Uniflor 1g Synthetic Grease Samples | eBay. I’m usually wary of buying anything on eBay, but this seller has a perfect 100% reputation over 680 sales, so it seems better than most.
Afaik there’s no reason to recommend Nyogel 760 over other silicone greases. Some flashlight store or whoever sold it back in the day, and ever since then it gets recommended in threads like this. It’s around 4x the price of Super Lube by volume.
760G … at least the tube I just got (as well as the XG-12) is clear/colorless and yes pretty thick/viscous.
This is subjective, but after reading of others’ good experience with the 760G with Titanium threads I had to try it on my ne Ti TS10.
Indeed it made twisting the head on and off for battery changes “feel” noticeably smoother. I had to know, so I repeatedly cleaned the treads and applied some of my other go-to lubes. I did find that the 760G was the best one that I tried. Now this is a limited use case. I won’t really be able to judge if it is any better for the rest of my lights than the cheap “pure” silicon grease until I have used it over time.
But as I mentioned, I tend to think that any of the many lubes that I have (probably a dozen total) would be fine for flashlight use. If a person has one of them, the gains from getting something different will be minimal. Unless they have a light that is not the commonly found flashlight configuration. Such as Ti, Si O-Rings, etc.
I am still using the same tube of Armytek Nyogel 760G 25ml from 2017. It is indeed the best in the market.
I used the smallest and cheapest I could find, a tiny tube of grease for servicing the threads and O-rings on coffee machines. Silicone grease is silicone grease.
+1 for SuperLube. It’s cheap (about $10 US for a big tune) food safe synthetic non-petroleum grease. It’s also dielectric. Good for silicone and nitrile or other o-rings. A tube lasts for years and years. I love it and use it on pretty much everything. You can also use silglyde silicone lube, 3M silicone paste, or the fancy-pants no oxid or nyogel. Anything non petroleum for your orings unless designed for it.
You could get the Ford-branded version and put it in a syringe. It’ll last forever.
Here is a SuperLube Compatibility chart.
Silicone greases are never recommended for silicone o-rings, but most o-rings used in flashlights are Buna-N / Nitrile.
Then they have with and without PTFE.
The one I use in the tube is ptfe free. I’ve used it with silicone o-rings before and it’s been fine.
I ended going with Super Lube because of the ease of access. I took a trip down to the local Harbor Freight and picked up a tube. I never knew how much of a difference cleaning and greasing the threads would make. Some of my lights were completely dry.