Industry News
How Backing Material Choice Changes Tape Performance
The silicone adhesive layer gets most of the attention, but the backing material determines how the tape behaves mechanically on the body, and this has a direct effect on skin safety. A stiff backing transmits more shear force to the skin whenever the patient moves, which is exactly what causes tension blisters at the tape edges. Softer, more conformable backings distribute that same movement across a larger surface area, reducing peak stress at any single point.
| Backing Type |
Conformability |
Breathability |
Best Use Case |
| Nonwoven Polyester |
Moderate |
High |
General securement, dressing fixation |
| PU Film |
High |
Moderate |
Waterproof barrier, IV site protection |
| Foam |
Low–Moderate |
Low |
Cushioning over bony prominences |
| Woven Cloth |
Moderate |
Moderate |
High-tension securement, device anchoring |
Coating Weight and Tack: Why More Adhesive Is Not Always Better
Coating weight, measured in grams per square meter of adhesive applied to the backing, is one of the most misunderstood specifications in tape manufacturing. Increasing coating weight raises initial tack, but past a certain threshold it also increases the force needed for removal, which raises the risk of medical adhesive-related skin injury (MARSI) in patients with fragile or repeatedly taped skin. Most medical-grade silicone tapes are formulated in the 15–35 g/m² range, with lower values reserved for neonatal or geriatric-focused products and higher values used where secure, long-wear fixation of tubing or devices is the priority.
Because silicone adhesives bond through molecular-level contact with the skin surface rather than aggressive chemical tack, they can achieve reliable hold at lower coating weights than acrylic systems, which is part of why they can be removed with less trauma even when applied over hair-bearing or previously irritated skin.
Repositionability Across Multiple Applications
Why Repositioning Matters Clinically
Repositionable tape is often discussed as a convenience feature, but in practice it changes clinical workflow: a securement tape that can be lifted and reapplied without losing hold allows clinicians to correct catheter angle, adjust dressing alignment, or check a wound site without opening a new tape package each time.
What Limits Repositioning Cycles
Repositioning is not unlimited. Each lift-and-reapply cycle transfers a small amount of skin oils and surface debris onto the gel surface, gradually lowering effective tack. Testing typically shows that a well-formulated soft silicone tape retains at least 80% of its original peel adhesion after three reposition cycles, after which performance drops more noticeably. This is a useful practical benchmark when comparing products for procedures that require frequent adjustment, such as pediatric IV securement.
Application Techniques That Reduce Edge Lift and Skin Stress
Even a well-designed tape can underperform if applied incorrectly. Edge lift is one of the most common failure modes reported in the field, and it is usually a technique issue rather than a product defect.
- Apply the tape without stretching it; tension applied during placement creates recoil force that pulls edges up as the backing relaxes
- Press from the center outward rather than from one end to the other, which prevents air pockets from forming under the gel layer
- Round the corners of cut tape strips, since square corners are disproportionately prone to catching on clothing or bedding and initiating peel
- Allow at least 15–30 seconds of dwell time under light pressure before releasing tension on the taped device, since silicone gel adhesion builds progressively rather than bonding instantly
Compatibility With Secondary Dressings and Devices
Silicone tape is frequently layered over or under other dressing materials, and not every combination performs predictably. Applying silicone tape directly over a hydrocolloid or foam dressing border generally works well because both surfaces are low-trauma, but applying it over ointment-saturated gauze or petroleum-based barrier products can reduce adhesion significantly, since the silicone gel bonds poorly to oily residues. For securing tubing or catheters, framing the device with tape on both sides rather than a single strip across the top distributes pulling force more evenly and reduces the chance of the tube working loose during patient movement.
Sterilization Method and Its Effect on Adhesive Stability
When silicone tapes are supplied as part of a sterile procedure kit, the sterilization method used matters for adhesive performance. Ethylene oxide (EtO) sterilization is generally the gentlest option for silicone gel, with minimal impact on crosslink density or tack. Gamma irradiation, while effective and widely used for its short cycle time, can cause slight chain scission in some silicone formulations at higher doses, which may marginally reduce peel strength if the gel chemistry is not specifically validated for it. This is why tape intended for gamma-sterilized kits should be dose-mapped and re-tested for adhesion performance after irradiation rather than assuming the same specification sheet applies across sterilization methods.
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