Silicone sheets came first, and for years they were described as the first-line option for post-surgical scar management. Topical silicone gel came later and does the same job through a different delivery method. If you are choosing between them, ask which one you will still be using in three months. That is what the comparison turned on.
They work by the same mechanism
Both create an occlusive silicone layer over the scar. That layer holds moisture at the skin's surface and shields the scar, and it is the mechanism that published research associates with softer, flatter, less red scars. A sheet is a pre-formed silicone film held on with adhesive. A gel is a liquid silicone that dries into the same kind of film in place, taking the shape of whatever it is applied to.
What the comparison found
A prospective study (Kim 2014) randomized thirty patients, two weeks to three months after surgery, to either a silicone gel sheet or a topical silicone gel, and scored them on the Vancouver Scar Scale at one and three months. There was no significant difference in efficacy between the two. Patients found the topical gel more convenient to use, and the authors concluded that where clinicians have a choice, they should decide based on scar location, lifestyle and how willing the patient is to keep the treatment going.
That last point matters more than the scale scores: the format you keep using is the one that works for you. The study is on the clinical evidence page.
Where sheets are the better fit
- Flat, accessible areas — a straight abdominal or chest line under clothing, where a sheet can stay put for hours
- You prefer set-and-forget — one application, then nothing until you change it
- Reuse matters to you — a sheet can be washed and reapplied for a while
Sheets struggle where skin moves a lot, where there is hair, in heat or humidity, and on faces — the adhesive lifts, and a visible patch is not always something you want to wear.
Where gel is the better fit
- Faces, necks and hands, where a visible sheet is not practical
- Joints and areas that flex, where a sheet peels
- Irregular, curved or long scars, where a sheet does not sit flat
- Hot or humid climates, and skin that reacts to adhesive
- Under clothes and under makeup, once dry
The trade-off is that a gel is reapplied two or three times a day rather than once, and it needs a few minutes to dry before you cover it.
Which to pick
If your scar is flat, hidden under clothing, and you would rather do one thing a day than two or three — try a sheet. If it is on your face, over a joint, in a hot climate, or you want it invisible while you go about your day — a gel is the more realistic choice. If you tried one and quietly stopped, switch formats before deciding silicone is not for you.
Whichever you pick, start only after the wound has fully closed and keep going for the full course. If you are comparing gels rather than formats, the comparison page looks at what a multi-ingredient gel adds to plain silicone.