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    Seneca

    Nothing unnecessary.

    Concentrated solid personal care. Salon-grade formulas stripped of the water, the plastic, and the waste.

    Join the waitlist

    Your shampoo is eighty percent water, shipped in plastic that will outlive you. We kept only what works and stripped away everything else.

    The Bar

    Salon-grade. Solid form.

    Surfactant-based, not soap. Concentrated formulas that lather and cleanse like the bottle you're replacing. One bar outlasts two to three of them.

    80g
    Per bar
    60+
    Washes
    0
    Plastic
    The Tin

    Aluminium. Drainage grate. Permanent.

    Not packaging. A home for your bar. The perforated grate keeps it dry between uses. When the bar is finished, you refill. The tin remains.

    ∞
    Reusable
    100%
    Recyclable
    552M
    Bottles trashed yearly in the US
    80%
    Of liquid shampoo is water
    2–3×
    More washes per Seneca bar
    Launch collection

    The Essentials

    S

    The Strip

    Clarifying Shampoo
    Deep clean.
    $16
    S

    The Drench

    Moisturising Shampoo
    Deep hydration.
    $16
    S

    The Coat

    Conditioner Bar
    Creamy transfer. No residue.
    $18
    How it works

    The ritual is simple.

    01

    Wet

    Two seconds under water. It's concentrated — a little goes far.

    02

    Lather

    Three to four passes across the scalp. Salon-grade foam builds instantly.

    03

    Return

    Back in the tin. The grate keeps it dry. No mush, no waste.

    The philosophy
    "It is not that we have a short time to live, but that we waste a great deal of it."
    — Seneca, 4 BC – 65 AD

    Named after the Stoic philosopher who believed the good life comes from removing the unnecessary. We applied his principle to your bathroom.

    Join the waitlist

    Strip it all back.

    Founding members receive 15% off and early access to The Essentials.

    VeganCruelty-freeZero plasticSLS-freeConcentrated
    Seneca
    Nothing unnecessary.
    © 2026 Seneca

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