Mepilex is not a hydrocolloid dressing. It is a silicone foam dressing made from absorbent polyurethane foam coated with a soft silicone wound contact layer. While both Mepilex and hydrocolloid dressings are used in wound care, they differ in material, structure, and how they interact with your skin.
What Mepilex Is Made Of
According to its FDA clearance documentation, Mepilex consists of a flexible polyurethane foam pad coated with a silicone layer on the wound-facing side and a breathable polyurethane film on the outer side. Some versions, like Mepilex Ag, also contain silver and activated charcoal for antimicrobial protection. The key distinguishing feature across all Mepilex variants is that soft silicone contact layer, which sticks gently to surrounding skin but doesn’t bond to the moist wound bed itself.
Hydrocolloid dressings, by contrast, are made from gel-forming materials (like gelatin or pectin) embedded in a sticky, waterproof outer layer. When a hydrocolloid contacts wound fluid, it swells into a gel that keeps the wound moist. Mepilex absorbs fluid into its foam core rather than forming a gel, and it allows water vapor to pass through its backing rather than sealing the wound off entirely.
Why the Difference Matters for Your Skin
One of the biggest practical differences between Mepilex and hydrocolloid dressings is what happens when you remove them. Hydrocolloids use aggressive adhesives that can strip away the outermost layer of skin (the stratum corneum) when peeled off. In a laboratory comparison of multiple wound dressings, researchers found that the hydrocolloid dressing Comfeel Plus caused a significant increase in skin water loss after removal, a measurement that reflects damage to the skin barrier. Mepilex Border, on the other hand, actually showed a slight decrease in water loss, and was the only dressing in the study with no visible skin cells attached to its adhesive after removal.
This makes Mepilex a better option for people with fragile or easily damaged skin, including older adults, patients on long-term steroid therapy, and newborns. It also means the dressing can be lifted and repositioned without losing its ability to stick, something you can’t do with a hydrocolloid.
What Mepilex Is Used For
Mepilex dressings serve two broad purposes: managing existing wounds and preventing new ones. For wound management, the foam core absorbs moderate to heavy drainage from surgical sites, burns, and chronic wounds like venous leg ulcers. The silicone layer helps minimize pain during dressing changes because it doesn’t adhere to the wound itself.
Mepilex Border also has a specific role in pressure injury prevention. Versions shaped for the sacrum (lower back) and heels are used in hospitals on patients identified as at risk for pressure ulcers. These dressings reduce friction between the skin and bed surfaces, prevent the skin from stretching or tearing, and absorb moisture, all factors that contribute to pressure ulcer development. A review published in Applied Health Economics and Health Policy found these dressings show promise for preventing pressure ulcers in acute care settings when used alongside standard prevention protocols like repositioning.
When a Hydrocolloid Might Be Better
Hydrocolloids have their own strengths. They work well on shallow wounds with light to moderate drainage, like minor burns, superficial abrasions, or blisters. Because they form a gel over the wound, they’re effective at keeping dry or lightly oozing wounds moist, which supports healing. They’re also thinner and more discreet under clothing.
Mepilex is generally the better choice when a wound produces more fluid, when the skin around the wound is fragile, or when frequent dressing changes are expected. Its foam core handles heavier drainage without breaking down, and its gentle adhesive won’t cause additional skin trauma with each change.
Wear Time and Practical Tips
Mepilex dressings can stay in place for up to seven days depending on the wound type and how much fluid it produces. You should change the dressing sooner if you notice a large amount of drainage soaking through the bandage, an offensive smell, or if the dressing gets wet or falls off. A small amount of ooze and some mild odor are normal and not reasons to change it early.
One important practical note: don’t apply skin barrier products, skin sealants, or cleansing wipes that contain silicone or dimethicone to the area before applying Mepilex. These products interfere with the dressing’s silicone adhesive and reduce how well it sticks. Mepilex should also not be placed over an existing pressure injury, even a Stage 1 (intact but reddened skin), or over burns or trauma to the sacrum or heels. For lower legs and feet with poor blood flow, a wound care professional should be involved before any foam dressing is used.