
Summer Glow Facial 50': new offer!
- Beauty - Beauty
Treat yourself to this gentle after-sun facial treatment for just 69 euros, exclusively available to book from 18 May to 16 September 2026 inclusive.
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Anyone who looks after their skin has probably heard of collagen, but what exactly is it?
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Collagen is a structural protein that is naturally produced in your body. It gives your skin its firmness, but it is also found in your hair, nails, bones, muscles and joints. With ageing, your natural collagen production decreases, resulting in wrinkles, cellulite and less elastic, thinner skin.
Our skin experts use beauty products by Sirène, a skincare line exclusively made for us in a Belgian lab. These products are packed with active ingredients that provide clearly visible results.
Of the skincare products we use, the following contain collagen:
- All our hydrating gel masks. Among them, a cucumber one which you can buy at our wellness centres. In our treatments, we like to switch things up now and again, alternating between different gel masks. For instance, we may use a mask with strawberry or kiwi extracts one time and then a mask with lotus or argan oil extracts another time. We mostly use a hydrating gel mask in our 25-minute facial treatments, to finish off the treatment.
- Body milk: available to buy at our wellness centre reception.
- All our day creams: multi-care hypersensitive, hydrating, Kigelia Africana skin lift, our day cream with UVA protection, and our restorative snail cream. All these creams are also available to buy at our wellness centres for use at home.
- Night creams: At night, your skin is at rest, meaning it is in optimal condition to repair itself and absorb the active ingredients of our Perfect Harmony night cream.
- Our boost and our snail serums: both serums are available to buy at our centres and we use them in our facial treatments.
- Our collagen sheet mask. This also contains special stem cells from a Swiss apple that retains its firmness for an incredibly long time. This collagen sheet mask is used in our collagen facial treatment, but you can also buy it for use at home.
In addition, we offer several facial treatments in our Beauty Clinic that boost your body’s natural collagen production. Read all about these anti-ageing treatments here.
Want to know what treatment is best suited for your skin needs? Book a free info session and one of our skin experts will be happy to tell you what you can expect!

- Beauty - Beauty
Treat yourself to this gentle after-sun facial treatment for just 69 euros, exclusively available to book from 18 May to 16 September 2026 inclusive.

- Sauna experience - Sauna experience
May invites you to step outside. To slow down. In our green oasis, every long weekend feels like a gentle pause. You’re warmly welcome, as Thermae Grimbergen is open every day!

- Sauna experience - Sauna experience
Never been to a sauna before? You’re curious, maybe even excited, but still have a few questions or doubts? That’s completely normal. Everyone faces that first step at some point. With a few simple tips, your first visit can instantly become a deeply relaxing experience.
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