UltraFire Maintenance Waterproof & Sealed Lubricant for Flashlights (0.53oz)

Pros: - Serve its main function to lube. it is greasy until the whole packaging has some oily layer. - Cheap - Quite water resistant and repellent. will help improve seal in the thread in case of watery environment - it is all you need for basic flashlight o-ring and thread lubrication

Cons: - nothing come to my mind right now. I think it won't be any though.

Other: - it is worth to spend for. it is only little fraction of the decent flashlight price. - go for this grease. period.

Pros: The container is filled up with lubricant - up to the brim - unlike other containers which are oftentimes half filled or less. The lubricant is also easily applied to my flashlights and not only does it lubricate, it also helps protect the light from water without damaging the silicone rings.

Cons: None so far.

Other: I'm definitely recommending this to the rest of the 'flashaholics' out there.