Incontinence-associated dermatitis (IAD) is a common skin condition among long-term care residents and is caused by prolonged exposure to urine or feces. IAD can lead to skin irritation, discomfort, impaired skin integrity, and an increased risk of secondary complications. Structured skin care, including cleansing and barrier protection, is recommended for the prevention and management of IAD.

This randomized controlled trial evaluated the effectiveness of a silicone barrier spray compared with zinc oxide ointment as part of a structured skin care program for residents with mild IAD in a long-term care facility. Participants were randomly assigned to receive either silicone barrier spray or zinc oxide ointment following routine skin cleansing. Clinical severity of IAD and skin barrier function were assessed at baseline, Day 7, and Day 14 using standardized clinical and biophysical measurements, including IAD severity score, skin hydration, transepidermal water loss, skin pH, and skin temperature. The study aimed to determine whether silicone barrier spray provides comparable or improved outcomes compared with conventional zinc oxide ointment in the management of mild IAD.

Incontinence-associated dermatitis (IAD) is a common form of moisture-associated skin damage resulting from prolonged exposure of the skin to urine and/or feces. The condition is particularly prevalent among residents of long-term care facilities because of advanced age, reduced mobility, cognitive impairment, chronic illness, and urinary or fecal incontinence. IAD is associated with erythema, discomfort, pain, impaired skin barrier function, and an increased risk of secondary complications, including pressure injuries and skin infections.

Maintenance of skin barrier integrity is a fundamental component of IAD prevention and treatment. Current international guidelines recommend structured skin care programs consisting of routine cleansing, moisturization, and barrier protection. Zinc oxide-based ointments are among the most commonly used barrier products because they provide effective protection against moisture and irritants. However, zinc oxide formulations may be difficult to apply and remove, can leave residue on the skin, and may increase friction during repeated cleansing procedures.

Silicone-based barrier films represent an alternative approach to skin protection. These products form a transparent, breathable, water-resistant layer on the skin surface and may reduce friction while preserving epidermal barrier function. Sprayable silicone barrier formulations may provide additional practical advantages, including rapid application, uniform coverage, reduced physical contact with damaged skin, and improved ease of use for caregivers. Such characteristics may be particularly valuable in long-term care settings where frequent skin care interventions are required.

Despite increasing clinical use of silicone-based barrier products, direct randomized comparisons between sprayable silicone barrier films and traditional zinc oxide ointments remain limited. Furthermore, objective evaluations of skin barrier recovery using biophysical measurements have not been extensively investigated in long-term care populations with IAD.

The purpose of this study was to compare the effectiveness of a silicone barrier spray and zinc oxide ointment when incorporated into a structured skin care program for long-term care residents with mild incontinence-associated dermatitis. In addition to evaluating clinical improvement, the study investigated changes in skin barrier function using objective biophysical assessments. The findings of this study are intended to provide evidence to support clinical decision-making regarding barrier protection strategies and to improve skin care practices for vulnerable older adults residing in long-term care facilities.

Inclusion Criteria:

• Resident of a long-term care facility.
• Diagnosis of mild incontinence-associated dermatitis (IAD), classified as GLOBIAD Category 1.
• Ability to provide informed consent personally or through a legally authorized representative.
• Willingness to participate in the study and comply with study procedures.

Exclusion Criteria:

• Incontinence-associated dermatitis (IAD) classified as GLOBIAD Category 2.
• Presence of skin erosion, skin loss, open wounds, or active skin infection in the assessment area.
• Known allergy or hypersensitivity to silicone-based barrier products or zinc oxide preparations.

Individual participant data will not be made publicly available because the informed consent and ethics approval did not include provisions for public data sharing. Data contain potentially identifiable information from residents of a long-term care facility, and sharing is restricted to protect participant privacy and confidentiality.

No additional study personnel were masked beyond the outcome assessor. Due to the visible differences between the silicone barrier spray and zinc oxide ointment, participants and care providers were aware of treatment allocation. All clinical assessments and biophysical measurements were performed by an independent outcome assessor who remained blinded to group assignment throughout the study.