Short answer: Volcanic sand exfoliates by mechanical friction: particles help detach surface cells as the product is moved across wet skin. The outcome depends on particle size and shape, concentration, lubrication, pressure and repetition. Gentle, occasional polishing may improve smoothness; hard scrubbing can disrupt the barrier. “Microtears” is not a standardized cosmetic diagnosis, but abrasion and irritation are real.
How particle-based polishing works
The stratum corneum naturally sheds corneocytes. A scrub accelerates removal by creating friction between particles, formula, fingers and skin. There is no single “volcanic” behavior: porousness, angularity, size distribution and the creamy base all influence how force is transmitted. (American Academy of Dermatology guidance)
Microdermabrasion research shows that mechanical resurfacing can alter hydration, sebum and barrier recovery, but professional devices and protocols are not equivalent to a jar scrub. Small studies and animal models help explain dose response; they do not prove that more passes or visible redness creates a better cosmetic result.
Pressure, frequency and body-area differences
Apply to wet skin with enough product to maintain slip. Use light circular movements for the labeled time, then rinse. Elbows, knees and feet may tolerate more than the cheeks, while inflamed blemishes, eyelids and a freshly shaved scalp should not be scrubbed. Fingertips provide better pressure control than a brush. (PubMed-indexed paper or review 2)
Begin once weekly. If skin remains comfortable, frequency can be adjusted within the product directions. Stinging after water, increased shine with tightness, persistent redness or flaking suggests over-exfoliation. Pause and use a simple moisturiser until comfort returns.
Lower-friction technique
- Wet skin fully and use a generous lubricating base.
- Let particles move lightly; do not press for “extra” effect.
- Limit contact time and rinse thoroughly.
- Moisturise afterward and use daytime sunscreen.
Microtears, plastic microbeads and clearer language
The internet term “microtears” is often used without a defined size, measurement or clinical endpoint. It is more accurate to discuss abrasion, erythema and barrier disruption, all of which increase with excessive force. The absence of a standardized microtear test is not a reason to scrub aggressively. (PubMed-indexed paper or review 3)
The US Microbead-Free Waters Act addresses intentionally added plastic microbeads in rinse-off cosmetics. Mineral volcanic sand is a different material, although responsible sourcing, wastewater impact and packaging remain legitimate environmental questions. Do not infer ecological superiority from “natural” alone.
Silouel products to consider
These are currently published options, selected for formula relevance—not proof that the finished products reproduce every result discussed in ingredient research.
- Vulcanic Phyto-Mineral Scrub — a physical exfoliant whose current store record lists volcanic sand. Review the product page and full INCI before use.
Related reading
Frequently asked questions
Does volcanic sand cause microtears?
That term lacks a standard cosmetic definition. Any abrasive can irritate or disrupt the barrier if particles, pressure or frequency are too aggressive.
Can I use a body scrub on my face?
Only if the label explicitly allows it. Body formulas may use particles and fragrance levels that are too intense for facial skin.
How often should I physically exfoliate?
Start about once weekly and adjust to comfort and directions. More frequent use is unnecessary if smoothness is maintained.
Is volcanic sand a plastic microbead?
No. Volcanic sand is mineral material, while US microbead legislation targets intentionally added plastic particles in rinse-off cosmetics.
Sources
- 1. American Academy of Dermatology guidance
- 2. PubMed-indexed paper or review 2
- 3. PubMed-indexed paper or review 3
Sources describe ingredient, mechanism or comparator research; they are not certificates of performance for any Silouel finished formula.
