In the right hands (experienced, trained), liquid injectable silicone is an ideal filler for lip augmentation. In addition to being permanent, it is very precise and smooth, allowing for natural-looking results.
It is difficult to say how much silicone is needed for lip augmentation because every case is different and therefore requires different amounts. In general, as silicone is permanent, I explain to my patients that I never try reach our end goal with just one treatment (unless for something very small or minor). In general, I never use more than 1cc total for both lips per treatment. Less is more and the doctor can always add a little more at a follow up visit.
Liquid injectable silicone is safe in the right hands which includes a board-certified dermatologist or facial plastic surgeon who uses and has experience with the multiple micro-droplet injection technique. The FDA has approved the use of silicone as a medical device; however it is an “off-label” use when used for lip augmentation.