Silicone grease
Excellent grease for keeping torch cap threads working smoothly.
The Nitecore Silicone Grease helps provide flashlights with the seal to stay airtight and last longer. Designed specifically for lubricating surfaces that may be conductive, this substance can be spread on the o-rings of any flashlight to create a tighter seal. Remarkably water resistant, this grease will keep the internal components of flashlight safe for years to come.
Excellent grease for keeping torch cap threads working smoothly.
I finally bought a small tub of silicone grease after getting frustrated with some torches arriving without any lubricant on the threads. There's a bit of silicone grease on the underside of the lid and I have used that to lubricate the threads on about three torches. A little bit goes a long way!
Excellent silicone grease, long lasting and only a tiny amount is required.