How to Use Silicone Scar Sheets: Timing, Hours, and Reuse

Your sutures come out, and the nurse tells you that in about two weeks you can start using silicone. You buy a box of silicone scar sheets, open it at home, and the instructions say one thing: apply to scar.

And then what?

How many hours a day? Do you take it off in the shower? How long does one sheet last? Can you wash it and stick it back on? How are you supposed to dry it?

I answer these questions every week in clinic. Silicone sheets have the strongest evidence base of any scar product you can buy over the counter — but here's the thing: buying the right product doesn't win. Using it correctly does. The same sheet worn 20 hours a day and worn 6 hours a day will not give you the same scar.

When can you start

Only after the wound is fully healed. For most people that's about two weeks after the sutures come out.

How do you know it's fully healed? No drainage, no scab, and the surface is intact, dry skin.

Starting early buys you nothing. Pressing silicone onto a wound that hasn't closed yet just seals in a wound that is still weeping.

And the gap between suture removal and starting silicone isn't dead time — that's when surgical tape is doing the work. Tape takes tension off the wound; silicone works on the remodelling that comes afterwards. They're a relay, not a choice between two options. I go into the timing in more detail in how long to wear surgical tape.

How many hours a day: 12 is the floor

Twelve to twenty-four hours a day.

Put plainly: keep it on as much as you can. Wear it to bed, wear it to work, take it off only to clean the scar and the sheet.

Below 12 hours the benefit starts to fall away, and that comes down to how silicone actually works. It isn't a drug. It doesn't dissolve anything. What it does is keep the outer layer of skin hydrated and slow the rate at which water escapes through the skin, so the scar tissue underneath stops getting the signal that it needs to build more.

That kind of effect depends on being continuous, not on being intense. Wearing a sheet for six hours and letting the scar dry out for the other eighteen resets your progress every single day.

How to apply it

Three steps, and people get every one of them wrong.

Clean the skin and let it dry completely. Skin that isn't bone dry is the number one reason sheets fall off. Right after a shower, right after ointment, or with any sweat on the skin — it won't hold.

Cut it 1 to 2 cm larger than the scar. Not just big enough to cover the line. Scars spread at the edges, and the sheet needs to cover that.

Press from the centre outwards. Push the air bubbles out. Anywhere there's a bubble is somewhere the sheet isn't doing its job.

How long does one sheet last, and can you reuse it

You can reuse it. That's what makes sheets cheaper to run than gel — and it's also where most people go wrong.

Take it off once a day, rinse it with plain water, let it air-dry, and put it back on.

• Water only. Don't scrub it with soap, don't wipe it with alcohol — that strips the tack right off it.
• Air-dry means leave it alone until it's dry. No towel, no hairdryer.
• Lay it sticky-side up while it dries so it doesn't pick up lint and dust.

One sheet generally lasts 2 to 4 weeks. When do you replace it? When it stops sticking, when the edges start curling, or when it still holds lint after a rinse.

Brands differ in thickness, tack, and whether they make a breathable version — the active ingredient is silicone in all of them. Pick one you'll actually keep on your skin every day. That matters far more than which box you bought.

How long before you see anything

At least 2 to 3 months. I usually ask people to commit to six.

You won't see much in the first two or three weeks, and that's normal — it doesn't mean the product is failing. Scar remodelling runs on a timescale of months.

If you form keloids, or you've scarred badly from surgery before, plan on longer.

When it won't stick, feels hot, or irritates the skin

It won't stay on. Go back and check that the skin was completely dry. If the scar sits over a joint or a shoulder — somewhere that's always moving — it's going to get peeled off no matter what; use paper tape to anchor it, or switch to one of the thicker sheets made for uneven areas, which flex better.

It feels hot and occlusive. Switch to a breathable version, or give the skin a short break. Just don't let "a short break" quietly turn into six hours a day.

The skin goes red and itchy. Stop, and change brands. Silicone itself rarely causes a reaction — usually it's the adhesive, and a different brand often solves it outright. If it still irritates, move to silicone gel instead.

Sheet or gel?

It depends where the scar is.

On the face, on an irregular scar, or over a large area — use gel. A sheet on the face is conspicuous, and it won't lie flat on an irregular surface. If it doesn't lie flat, it isn't sealing anything.

On the body, on flat skin — use a sheet. Stronger occlusion than gel, and you can reuse it.

Whether you can run gel, sheets, and surgical tape at the same time, and in what order, is its own question: can you use scar gel and surgical tape together.

Scar care doesn't work because you bought the product. It works because you do it every day. Your habits decide the result.

Common questions

The wound isn't fully healed. Can I start silicone now?

No. Wait until the surface has closed — no drainage, no scab. Until then, surgical tape is the job.

Is eight hours overnight enough?

It's below par. Twelve hours is the floor; over twenty is ideal.

Can I wash a silicone sheet?

Yes, and you should — daily. Rinse in plain water, air-dry, reapply. No soap, no alcohol.

How often do I replace a sheet?

Every 2 to 4 weeks. Replace it when it stops sticking, the edges curl, or it holds lint after rinsing.

My scar is years old. Is there any point starting now?

Far less than on a new scar. Silicone earns its keep while the scar is still active and remodelling. A mature scar usually needs a different approach — start with how scars are classified and treated, or let me take a look at it.

I've used it for three months and the scar is still there. Did it fail?

Silicone doesn't make scars disappear — nothing does. What it can do is help the scar settle flatter, finer, and paler than it otherwise would. Results vary between people, and depend on your skin, the site, and how much tension is on the wound.

Further reading

• How long to wear surgical tape after surgery
• Can you use scar gel and surgical tape together
• Complete guide to post-surgical scar prevention

About the author

Dr. Ta-Ju Liu

Director of Liusmed Clinic. Over 15 years of clinical experience in minimal-incision surgery; board-certified dermatologist. Specialises in extreme minimal-incision surgery (lipoma, epidermoid cyst), bromhidrosis surgery, and post-surgical scar care.

Related specialties

• Scar revision
• Aesthetic complication repair