Silicone Scar Therapy: How Silicone Sheets and Gels Treat Keloids and Hypertrophic Scars
Quick Summary: Silicone scar therapy is the first-line non-invasive option for hypertrophic scars and keloids. Sheets and gels share one occlusion-and-hydration mechanism; the right format depends on scar location and how much the skin moves. Used daily for 2–6 months, silicone is the evidence-backed starting point clinicians recommend for raised post-surgical scars.
A scar that thickens into a raised, firm ridge after surgery is either a hypertrophic scar or a keloid — exactly the situation silicone scar therapy was designed for. Medical-grade silicone scar sheets and gels have been used since the early 1980s, and a Cochrane review found that silicone sheeting improves scar thickness and colour versus no treatment. Neither format cures a scar, and results need months of consistent use — but for most raised, discoloured scars, silicone is the first step a clinician will recommend.
First, Identify the Scar Type
Not every scar responds to silicone the same way. Raised scars split into hypertrophic scars and keloids — the two categories with the strongest silicone evidence — while flat or sunken scars belong to a different group.
| Scar type | Appearance | How it behaves | Silicone appropriate? |
|---|---|---|---|
| Hypertrophic scar | Raised, red or pink, firm | Stays within the original wound border; often flattens partly over 1–2 years | Yes — first-line option |
| Keloid | Raised, nodular, can be dark or glossy | Grows beyond the original injury border and keeps expanding | Yes — often combined with other treatment |
| Atrophic (sunken) scar | Depressed, e.g. acne pits | Loss of tissue below skin level | Limited — different mechanism needed |
| Mature flat scar | Flat, pale | Stable and quiet | Optional — little visible change expected |
Ask a physician or dermatologist if you are unsure which category fits. A keloid that keeps expanding may need more than a topical sheet, and a sunken scar will not be lifted by occlusion alone.
How Silicone Sheets and Gels Work
Silicone does not deliver a drug. Medical-grade silicone forms a thin, breathable barrier that traps moisture in the outer skin layer, and that sustained hydration changes how the scar tissue remodels — the occlusion-and-hydration mechanism described in the dermatology literature. Over weeks of wear, the association is softer, flatter, lighter scar tissue.
Both formats rely on the same principle, which is why clinical guidance treats them as interchangeable on efficacy:
- Silicone sheets — self-adhesive, reusable for weeks, physically occlude the scar, and are suited to flat or gently curved areas such as the chest, abdomen, or limbs.
- Silicone gels — brush-on and self-drying, suited to joints, the face, and hairy or hard-to-cover areas where a sheet will not stay put.
What the Evidence Says
The most cited source is the Cochrane systematic review of silicone gel sheeting (2013): across trials, sheeting improved scar thickness and colour versus no treatment. The authors also note that many trials were small and of limited quality — evidence supports use, not promises of complete removal. Dermatology guidelines still list silicone sheets and gels as first-line prevention and treatment for hypertrophic scars and keloids, including after C-sections and joint surgery.
Realistic expectations, based on published protocols:
- Timing: start once the wound is fully closed — usually 1–2 weeks after surgery.
- Wear time: build up to 12–24 hours daily; fewer hours means slower results.
- Duration: plan 2–6 months of daily use. Silicone is a slow, mechanical therapy.
- Outcome: expect flattening, softening, and fading — not disappearance.
Sheets vs Gels: Which Format to Choose
| Factor | Silicone scar sheet | Silicone scar gel |
|---|---|---|
| Ideal for | Chest, abdomen, back, limbs | Face, joints, scalp, flexing skin |
| Convenience | Applied once, reusable 2–4 weeks | Dries in minutes; reapply after washing or heavy sweat |
| Visibility | Discreet under clothing; some are skin-toned | Invisible once dry |
| Cost over treatment | One reusable sheet covers a long course | One tube covers a long course, then needs replacement |
| Adhesion on joints | May peel at wrist, elbow, or knee | Stays put on moving skin |
For a straight post-surgical scar on the abdomen, a reusable silicone scar sheet is usually the more economical route: one sheet wears and washes for 2–4 weeks. For the face or across a joint, a gel is often the practical choice because it will not peel. Switching formats as your routine or scar location changes is normal.
How to Use Silicone Scar Sheets Correctly
Technique drives most of the result — a sheet that slips off overnight underperforms no matter the material.
- Clean the scar with mild soap and water; dry completely.
- Cut the sheet to cover the scar plus about 1 cm of healthy skin on each side.
- Press the adhesive side on, smoothing air bubbles; tape edges if they lift.
- Wear 12–24 hours daily; remove briefly for bathing, dry skin and sheet, then reapply.
- Rinse the sheet daily with mild soap, air-dry, and reuse until adhesion weakens — usually 2–4 weeks.
If redness or irritation appears under the sheet, stop for a day or two, then resume with shorter wear times. Irritation is uncommon with genuine medical-grade silicone but should always be respected.
Buying Silicone Scar Products in Canada
Silicone scar sheets and gels sold in Canada fall under Health Canada medical device oversight, so buy from a supplier that can document its regulatory position. CliniEco Medical is a licensed medical device establishment (MDEL #35334), and its reusable silicone scar sheet is a skin-toned, medical-grade sheet for post-surgical and hypertrophic scar management — a simple, traceable choice for clinics and home-care teams.
Related reading
FAQ
How long does silicone scar therapy take to show results?
Most protocols expect the first flattening and softening within 4–8 weeks of daily wear, with continued improvement over 2–6 months. Judge response only after about 3 months of consistent use.
Can silicone sheets remove old scars?
No product removes a scar completely. Silicone flattens, softens, and fades raised scars; older scars can still respond, but improvement is gradual and partial. Painful, itchy, or growing scars need clinician assessment, not a topical product alone.
Are silicone sheets or gels better for keloids?
Both are used, and dermatology guidance often pairs silicone with other measures for aggressive keloids. Sheets give longer occlusion on flat areas; gels handle awkward locations. A growing or recurrent keloid needs a dermatologist or plastic surgeon — it may require injection therapy, pressure, or surgical revision in addition to silicone.
When can I start using silicone after surgery?
Start only after the wound is fully closed — no scab, no open area, no moisture — usually 1–2 weeks after surgery. Confirm the go-ahead at your follow-up; deeper incisions and dissolvable sutures can shift the timeline.
How often should a reusable silicone sheet be replaced?
A reusable medical-grade sheet typically holds adhesion for 2–4 weeks with daily washing. Replace it when it stops sticking, stiffens, or shows visible damage; mild fragrance-free soap and air-drying extend its life.
Last updated: September 2026. CliniEco Medical is a licensed medical device establishment (MDEL #35334). This article is for general information and does not replace advice from a physician, dermatologist, or plastic surgeon.
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