06 March, 2026

The right technique is what separates a dressing that stays put for five days from one that peels off the moment you step into the shower.

Most people know the frustration. You slap a plaster on before washing up and it's hanging off by the time you're done. For someone dealing with a surgical wound or a healing tattoo, that's not just annoying it's a real problem. Transparent film dressings exist to solve exactly that. They sit flush against the skin, keep water out completely, and still let the skin breathe underneath. Surgeons, nurses and tattoo artists rely on them every single day. If yours keep lifting too early, the issue is almost always technique, not the product itself.

What Is a Transparent Film Dressing?

It's a thin, clear, flexible sheet made from polyurethane with a gentle adhesive coating on one side. It creates a barrier against water and bacteria while still allowing water vapour to escape through the film. That breathability is important because it stops the skin underneath going soft and soggy a condition called maceration, which slows healing and increases infection risk.

Here's something a lot of people don't realise: wounds actually heal faster in a moist environment than they do when left to dry out and form a scab. Film dressing maintains that ideal environment for days without you having to do anything. Because the film is completely transparent, you can also monitor the wound without removing the dressing, which reduces the risk of disturbing healing tissue unnecessarily.

One thing worth noting: film dressings are not suitable for heavily weeping wounds, infected wounds, or deep wounds that need packing. If the wound is producing a lot of fluid, a hydrocolloid dressing is the more appropriate choice.

What You'll Need Before You Start

Get everything within reach before you begin. Reaching for items mid-application means touching surfaces that carry bacteria, which defeats the whole point of a sterile technique.

You'll need a NanaCare Transparent Film Dressing in the right size for your wound, sterile saline solution or a wound cleanser, an alcohol prep pad or alcohol-free wipe, clean paper towels (avoid cloth, which can harbour bacteria), medical scissors if you need to trim the dressing to shape, and a pair of disposable gloves.

How to Apply It: 7 Steps

Step 1: Wash your hands and put on gloves. Scrub for a full 20 seconds, dry thoroughly, then glove up. Skin naturally carries bacteria that can infect an open wound, so this step isn't optional.

Step 2: Clean the wound. Use saline solution or a wound cleanser to gently clear the wound site. Avoid hydrogen peroxide or undiluted alcohol directly on the wound as these damage the new cells forming at the edges.

Step 3: Degrease the surrounding skin. Wipe the area around the wound with an alcohol prep pad and wait about 60 seconds until it has fully dried. This is the step most people skip, and skipping it is the number one reason dressings lift prematurely.

Step 4: Cut the dressing to size. It should extend at least 2 cm past the wound on every side. Round off every corner with scissors. Square corners always catch on clothing and start peeling away first.

Step 5: Apply the dressing. Peel off the first backing layer and lay it over the wound. Do not stretch it. Lay it down flat and smooth from the centre outward to push out any air bubbles.

Step 6: Remove the carrier layer. Peel off the second backing layer while pressing the dressing down with your other hand so it doesn't shift out of position.

Step 7: Press the edges firmly. Use your fingertips to press all four edges down for a full 30 seconds. Body heat activates the adhesive and bonds it into the natural texture of your skin. This single step can roughly double how long the dressing stays on.

One tip after applying: avoid heavy exercise or heat for at least two hours. The adhesive is still bonding during this window, and sweat before it has fully set is the most common reason dressings lift within the first few hours.

When to Change It and How to Remove It

For most wounds, changing every three to five days is the right interval. Change it sooner if the edges start lifting, the film goes completely opaque, or you notice coloured fluid building up underneath.

To remove it, run warm water over the dressing for about a minute, then peel it back flat across itself, parallel to the skin. Do not pull it straight upward. Peeling upward creates shear force against the skin and can cause tearing, which is particularly risky for older or more fragile skin. If any section resists, apply more warm water and give it another minute before trying again.

A quick note on MARSI, which stands for Medical Adhesive Related Skin Injury. It occurs when adhesive is pulled away from fragile skin too aggressively. Anyone over 65, on steroid medication, or with known skin fragility is at higher risk. For these patients, silicone border dressings designed for gentle removal are worth considering.

Guidance for Specific Situations

Post-surgery wounds: Only apply once the skin is fully closed and your surgeon or nurse has confirmed it is safe to shower. Change every three to five days. If you notice green or yellow fluid under the film, or the surrounding skin becomes hot and red, remove the dressing and contact your GP the same day.

Tattoo aftercare: Your tattoo artist will typically apply the first layer in the studio. After 24 hours, remove it in a warm shower, wash the area gently with fragrance-free soap, pat dry, and apply a fresh NanaCare dressing. This second layer can stay on for three to five days. After that, switch to a dedicated tattoo moisturiser.

Blisters: Apply over an intact blister to protect it and reduce friction. Do not drain it as the skin roof acts as a natural sterile barrier. If the blister has already burst, place a non-stick gauze pad over the raw area first and then use the film dressing as a waterproof outer cover on top.

Diabetic skin: Film dressings can help protect vulnerable areas on the feet before they develop into open wounds. Check the skin visually every day. Never apply over any wound showing signs of infection, and always consult your podiatrist or GP for actual ulcers.

Troubleshooting Common Problems

If the edges are lifting within hours, the skin was likely not fully degreased or dry before application. Remove it, prep the skin properly with an alcohol wipe, let it dry completely, then reapply with at least 3 cm of overlap and rounded corners.

Small air bubbles under the film are fine and nothing to worry about. Large bubbles mean the film was stretched during application. Replace it and this time lay it down with no tension at all.

If the film looks white or cloudy, that is normal wound fluid collecting underneath. It only becomes a concern if the fluid turns green or develops a bad smell, either of which means you should contact your GP.

A defined red, itchy border that matches the exact shape of the dressing edge may indicate an adhesive reaction. Stop using it and speak to a pharmacist about your options.

If the dressing is painful to remove, do not pull. Soak the area in warm water for two minutes and it will release on its own.

Frequently Asked Questions

Can I shower with this dressing on? Yes, that's one of the main reasons to use it. Film dressings are fully waterproof under running water. Pat the dressing dry afterwards and check the edges. Very long, hot showers can soften the adhesive over time, so a warm shower is better than a prolonged steamy one.

How long can I leave it on? Between three and seven days depending on the location, how active you are, and how oily your skin tends to be. Check it daily and change it if edges lift or fluid pools underneath. Never leave any dressing on beyond seven days.

The film has gone cloudy. Is something wrong? Usually not. Cloudy or white fluid under the film is the natural exudate your body produces during healing. Clear or pale yellow is normal. Green fluid, a bad odour, spreading redness or a fever are signs of infection and you should see your GP the same day.

Can I cut it to a different shape? Yes, and for awkward or irregular wounds it's actually recommended. Use clean sharp scissors, cut smoothly, and round off every single corner and tip. A pointed corner will always be the first thing to snag on clothing and start peeling.

Is it safe for children and elderly patients? Yes, with some care. For children under five, check with a pharmacist first and always use warm water to remove it. For elderly patients whose skin has thinned with age, use minimal adhesive overlap, check the skin daily, and always remove with warm water rather than pulling.

What is the difference between this and a hydrocolloid dressing? Film dressings are thin and non-absorbent, ideal for clean shallow wounds, tattoos and blisters where you want waterproof protection with full visibility. Hydrocolloid dressings have an absorbent gel layer that actively manages wound fluid, making them better suited for wounds that are weeping. If the wound is dry and clean, use film. If it is producing fluid, use hydrocolloid.

Are NanaCare film dressings latex free? Yes. All NanaCare film dressings are completely latex free, hypoallergenic and paraben free.