Skin-contact products such as sports gloves, wrist supports, insoles, smart wearable accessories, protective gloves, and sports protective gear frequently come into contact with skin sweat and sebum. During long-term use, if the coating's sweat or sebum resistance is insufficient, issues such as stickiness, discoloration, peeling, tactile changes, or decreased adhesion may occur. The performance of coating silicone in such applications depends on material formulation, degree of curing, coating thickness, and use environment.

Sweat contains water, salts, and small amounts of organic substances, while sebum contains oil-based components. Long-term contact with these substances may affect the coating surface and interfacial bonding. Some coatings show no obvious appearance change after short-term contact, but after repeated contact, friction, and drying, surface stickiness or gloss changes may occur. For products requiring prolonged wear or high-intensity sports use, sweat and sebum resistance should be included in preliminary evaluation.

When testing sweat resistance, actual product use conditions can be simulated by placing coated samples in sweat simulant solutions of specified concentration and observing changes in appearance, tactile feel, adhesion, and coating integrity after a certain period. Sebum resistance testing can reference relevant oil contact test methods to observe whether the coating develops swelling, stickiness, discoloration, or peeling. It should be noted that different products have different use intensities, and testing conditions should be adjusted accordingly. For example, sports gloves may require more stringent friction and sweat resistance testing, while ordinary wearable accessories can focus on appearance stability after long-term contact.

Degree of curing is an important factor affecting sweat resistance. If the coating is insufficiently cured, low-molecular-weight substances may remain on the surface, making stickiness or surface changes more likely upon contact with sweat. Excessive coating thickness may also lead to uneven internal curing, affecting long-term stability. For transparent coatings, if haziness, whitening, or uneven gloss occurs after sweat contact, further investigation is typically needed from the aspects of curing conditions, coating thickness, and material compatibility.

When selecting coating silicone for skin-contact products, enterprises should focus not only on tactile feel and anti-slip performance but also on the material's comprehensive performance under sweat, sebum, friction, and washing conditions. If the product is planned for specific markets, confirmation of compliance with relevant testing requirements should also be made in advance. Testing through simulated real-world use scenarios can reduce later-stage customer complaint risks and improve product stability during long-term use.

The value of coating silicone in skin-contact applications is reflected not only in initial tactile feel but also in performance under long-term contact environments. Reasonable material selection, adequate curing, and targeted testing help enterprises develop more stable and comfortable skin-contact products and maintain good consistency in sports, wearable, protective, and medical assistive applications.

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