"Acne scars" is one label for three different problems, and they do not have the same answer. Before buying anything, work out which one you are looking at — it changes what will help, and it changes what a reasonable timescale looks like.
Marks, dips and bumps
Marks, not scars. Flat red, purple or brown patches left after a spot heals. The skin surface is intact; the colour is post-inflammatory. These usually fade on their own over months, faster with sun protection, and they are not scar tissue at all.
Atrophic scars. Depressions below the skin surface — rolling, boxcar or icepick — left where inflammation destroyed tissue and the body did not rebuild enough connective tissue to fill the gap. These are permanent structural changes.
Raised scars. Firm, thickened or keloid scars, most often on the jawline, chest, shoulders and back, where acne was deep and the skin is under tension. Less common than the other two, and more likely in people prone to keloids.
Run a fingertip over the area with your eyes closed. Flat means marks. A dip means atrophic. A bump means raised.
Where silicone helps
Silicone works by sealing the scar surface and holding moisture in. That is a surface-level intervention, and it is useful for raised acne scars — the same first-line role topical silicone plays for hypertrophic and keloid scars elsewhere on the body. It also keeps scarred skin comfortable and supports the texture and tone of the area over time.
A comparative case series of 80 patients (Yun 2013) found that silicone gel with vitamin C reduced erythema and melanin index on fine surgical scars, which is why tone appears in this conversation at all. That was surgical scars, not acne scars, so do not read it as an acne result. It is on the clinical evidence page.
Where it does not
Silicone does not fill a depression. No topical product does. An atrophic scar is missing tissue, and putting an occlusive film over the top of it does not bring the tissue back. The treatments that address atrophic scarring — microneedling, resurfacing lasers, chemical reconstruction, fillers, subcision — are clinic procedures, and they are the right answer for that problem.
Timing matters more here than anywhere
Acne scar care runs into a specific problem: the skin is often still breaking out. Silicone gel goes on intact, fully healed skin. That means:
- Not on active spots, open lesions, or skin that is broken or weeping
- Not while the area is inflamed — let it calm first
- Not over a treatment your dermatologist has you on, without asking them first
If acne is still active, treating the acne is the priority. Every new inflamed lesion is a chance at another scar, and no scar product outruns that.
A workable plan
- Get active acne under control, with a doctor if it is more than mild.
- Protect the area from sun daily; unprotected marks darken and last longer.
- Once the skin is intact and calm, use topical silicone consistently on raised scars and to support texture and tone.
- For depressions, book a consultation. Topical care can continue between clinic sessions.
Our acne scars page goes into each scar type in more detail.