Skeen vs. Tower 28 SOS: Which Hypochlorous Acid Spray Is Worth It?
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the short answer
Tower 28 SOS and skeen both use the same active ingredient: hypochlorous acid. Tower 28 has the Sephora shelf and the certifications. Skeen has precision-tuned formulation tested for heavy metals, and no retail markup. If you’ve been paying $28 a bottle, keep reading.
what is hypochlorous acid, and why does it matter?
Hypochlorous acid (HOCl) is a molecule your own body produces as part of its normal biological processes. In skincare, stabilized HOCl works to cleanse away impurities and help calm visible irritation — without alcohol, fragrance, or harsh chemicals. It’s gentle enough for daily facial use and powerful enough to use on wounds.
side by side
| Skeen Facial Spray | Tower 28 SOS | |
|---|---|---|
| Price per oz | From $5/fl oz | From $12/fl oz |
| Full ingredients | Water, Sodium Chloride, HOCl | Water, Sodium Chloride, HOCl |
| HOCl concentration | Precision-tuned per use case (120ppm facial) | Not disclosed |
| Manufacturing | Electrolysis; water tested for heavy metals; food-grade salt | Not disclosed |
| Certification seals | — | National Eczema, Rosacea & Psoriasis foundations |
| Bottle sizes | 2 oz (travel-friendly) | 1 oz / 4 oz |
| Where to buy | skeencare.co (direct) | Sephora, Target, Ulta, Amazon |
the ingredients are the same. the price and manufacturing are not.
Both products contain three ingredients: water, sodium chloride, and hypochlorous acid. There is no proprietary formula difference at the ingredient level. But how HOCl is made matters.
Skeen produces HOCl via electrolysis, not diluted concentrate or acidified bleach. Our water is softened to zero hardness and independently tested for heavy metals including iron, mercury, lead, and calcium. We use food-grade salt with no pesticides or anti-caking agents. Tower 28 doesn’t disclose these details. When the ingredient deck is identical, manufacturing is the real differentiator.
The price also varies materially, with skeen offering prices as low as $5 / fl oz., compared to Tower 28’s 1 fl oz. bottle which starts at $12.
what tower 28 does better
Three national skin health organization endorsements: the National Eczema Association Seal of Acceptance, the National Rosacea Society, and the National Psoriasis Foundation. If you have a diagnosed condition and want documented third-party validation, Tower 28 has that paperwork. They also have the retail footprint: Sephora, Target, Ulta, Amazon.
what skeen does better
Manufacturing transparency. Skeen’s water is tested for heavy metals. Our salt is food-grade. And each product is precision-formulated to a specific ppm for its use case: 120ppm for facial, 150ppm for wound care, and 200ppm for surface cleaner.
Skeen also sells in small, travel-friendly 2oz bottles, which matters more than most people realize. HOCl is an active molecule that loses potency over time when exposed to light and air. A 2oz bottle you finish in 4–6 weeks keeps you using fresh, potent product. A 4oz bottle sitting on your shelf for months is delivering less HOCl than you think by the end.
And skeen is more than just a facial spray. The same molecule, the same standards, scaled to wound care and surface cleaning. It’s one ecosystem, not one product.
who should buy skeen?
- You want a more cost-effective option with the same quality ingredient.
- You want HOCl with documented manufacturing standards and ingredient purity.
- You prefer a smaller, fresher bottle over a large one that degrades over time.
- You want wound care and surface cleaning in the same brand ecosystem, titrated to each specific use case.
who should buy tower 28?
- You specifically want third party certification seals.
- You prefer buying in-store at Sephora, Target, or Ulta.
- You want a 1 or 4oz bottle and don’t mind the shorter shelf life.
the bottom line
Same ingredient. Different supply chain. Tower 28 wins on certifications and retail presence. Skeen wins on price, manufacturing transparency, and freshness. At $5 per fl oz, you’re not sacrificing quality.
Shop the skeen Facial Spray at skeencare.co — buy two, get one free.
Related: Skeen vs. Active Skin Repair: The HOCl First Aid Comparison