More and more bathrooms are trading plastic bottles for a small, solid bar — and for good reason. A solid shampoo can replace two or three bottles of liquid shampoo, uses no added water, and concentrates its active ingredients rather than diluting them. At Savonneries Bruxelloises, we craft our solid shampoos the same way we've crafted our soaps since 1926: by hand, in Laeken, with carefully selected natural ingredients. Here's everything you need to know to get the most out of yours.
Why switch to a solid shampoo?
A solid shampoo isn't just a trend — it's a more concentrated, more durable alternative to liquid shampoo. One bar typically replaces two to three standard bottles, which means less plastic waste and less water shipped halfway across the world for nothing. Because there's no added water in the formula, the active ingredients — royal jelly, aloe vera, cucumber — are present in far higher concentration than in a diluted liquid shampoo.
It's also simply more practical: no risk of leaking in your luggage, no liquid restrictions at the airport, and a bar that lasts for weeks of daily use.
Curious to try one? Our solid shampoos start at €15 and are handcrafted in Brussels.
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How to use a solid shampoo, step by step
Using a solid shampoo is straightforward once you know the technique, and it only takes a few tries to get right.
Start by soaking your hair thoroughly with warm water — more water than you'd think, since the bar needs a wet surface to lather properly. Then either glide the bar directly over your scalp and lengths, or rub it briefly between your wet hands to build up a lather before applying it to your hair. Massage your scalp with your fingertips for 30 to 60 seconds to work the lather through and stimulate circulation, then rinse thoroughly with clear water. Between uses, let the bar dry fully on a well-ventilated soap dish — this single habit is what determines how long it will last.
What about the transition period?
Many first-time users notice their hair feels heavier or slightly greasy during the first one to three weeks. This is completely normal: your scalp is recalibrating its sebum production after moving away from sulfate-based formulas. During this adjustment phase, a diluted apple cider vinegar rinse (one tablespoon per glass of water) after shampooing helps restore lightness and shine more quickly.
Which solid shampoo suits your hair type?
Not all solid shampoos are built the same, and choosing the right formula makes a real difference. For dry or dull hair, a rich, restorative formula like our Apricot & Royal Jelly Solid Shampoo (70gr) works best, nourishing the lengths while adding softness. For fine hair or roots that tend to get oily quickly, a lighter formula such as our Cucumber & Aloe Vera Solid Shampoo cleanses without weighing hair down. And for a sensitive scalp, formulas built around aloe vera and green tea are known for their soothing properties.
How long does a solid shampoo bar actually last?
A well-dried 70–75gr bar is roughly equivalent to two to three 250ml bottles of liquid shampoo — around 60 to 80 washes, depending on your hair length and how often you wash. The single biggest factor in how long a bar lasts isn't the formula, it's whether you let it dry properly between uses.
Frequently Asked Questions
Do I need a special soap dish for a solid shampoo?
You don't need anything specific, but a well-ventilated, draining soap dish makes a real difference. Keeping the bar wet in a closed dish or on a flat surface causes it to soften and wear down much faster than if it's allowed to dry between uses.
Can I use a solid shampoo on colored or chemically treated hair?
Solid shampoo bars can generally be used on colored or treated hair, but as with any new hair product, ingredients and their effects vary from one formula to another. If you have specific concerns about color-treated or chemically processed hair, it's worth checking the full ingredient list of the bar you're considering or asking your hairdresser.
Do I still need conditioner with a solid shampoo?
It depends on your hair type and personal preference. Some people find that solid shampoo alone leaves their hair soft enough, especially with richer formulas like Apricot & Royal Jelly. Others, particularly with longer or drier hair, still like to follow with a conditioner or a leave-in treatment.
Why does my hair feel different right after switching?
This is the transition period described above — it's a temporary adjustment as your scalp recalibrates, not a sign the product isn't working. It typically settles within one to three weeks.
Can I travel with a solid shampoo?
Yes — this is one of its main practical advantages. Since it's solid, it isn't subject to the liquid restrictions applied to carry-on luggage, and there's no risk of it leaking into the rest of your bag. Just let it dry fully before packing it in a container.
In summary
A solid shampoo isn't a gimmick or a compromise — used correctly, it's a concentrated hair treatment that's more economical over time and easier on your bathroom shelf. Discover our full range of solid shampoos, crafted in Brussels to the same standards we've applied to our soaps since 1926.
Ready to make the switch? Explore our solid shampoo collection, handcrafted in Brussels since 1926 — free shipping in Europe on orders over €30.
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