Wall cladding
Indoor / Outdoor Cladding Adhesive – ARDEX X77
Indoor / Outdoor Cladding Adhesive – ARDEX X77
✔ Fiber-reinforced adhesive ideal for wall facings and natural stones
✔ Very strong adhesion for heavy loads
✔ Water-repellent formula limiting efflorescence
✔ Reduced consumption thanks to its lightweight technology
✔ Suitable for indoor / outdoor use
✔ Very good deformability and application comfort
- Weight15 kg
Your order is prepared and protected
Stone is heavy and its edges are fragile: we leave nothing to chance.




- On a pallet or as a parcelDepending on the weight, your products are loaded and secured on a pallet, or carefully packed as a parcel.
- Wrapped and strappedPallets are stretch-wrapped and strapped to limit movement and knocks during transport.
- Checked and carefully loadedEvery order is checked by our team, then loaded onto the truck with care.
What if a piece arrives damaged?

Every order is carefully prepared and protected. Despite all our precautions, a few pieces may exceptionally arrive damaged. No need to worry: we handle the situation together with you.
- Let us know as soon as possible, with a few photos: we take it from there.
- Carry on with your project. A damaged piece can often be used for the cuts needed during installation.
- Once your order is fully unpacked, set aside the pieces that are genuinely unusable and send us a few overall photos. We can then assess the exact quantity involved and put the right solution in place.
In every case, we do what it takes so your project can be completed with peace of mind.



Total incl. taxes Total price :
A stone specialist can help on 06838 979 91 58.
Family business
Since 1934
7 stores
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Description
Description
Comparison of Recommended Adhesives
|
LARGE FORMAT
TILE
|
OUTDOOR
STONE
|
INDOOR
STONE
|
FACING
YOU ARE HERE ↓
|
||
|---|---|---|---|---|---|
| Materials | Tile, porcelain stoneware, natural stone | Tile, porcelain stoneware, dark stone | Natural stone (travertine, Burgundy, opus) | Light natural stone, marble, travertine | Facing stone |
| Use | Simple indoor / outdoor installation | Large formats indoor / outdoor | Terrace, outdoor paving | Indoor, underfloor heating | Wall cladding |
| Substrates | Stable substrate only | Stressed substrates | Irregular substrate possible | Standard stressed substrate | Wall |
| Specificity | Economical solution | Flexible, high resistance | Corrects thicknesses | Flexible, protects light stone | Very high adhesion |
| Underfloor heating | ❌ No | ✔ Yes | ✔ Yes | ✔ Yes | ✔ Yes |
| Outdoor | ✔ Possible | ✔ Ideal | ✔ Ideal | ✔ Possible | ✔ Yes |
ARDEX X77 Flex is a high-performance fiber-reinforced flexible adhesive designed for installing natural stone, wall facings, and ceramic coverings, both indoors and outdoors.
Thanks to its fiber-reinforced and water-repellent formulation, it offers very strong adhesion and excellent hold for heavy loads, making it particularly suitable for natural stone wall applications.
Its technology also limits the risk of efflorescence and unsightly discoloration often found on certain facings or natural stones.
ARDEX X77 is particularly suitable for:
- natural stone wall facings,
- heavy stones or thick formats,
- demanding vertical applications,
- and substrates requiring a flexible and high-performance adhesive.
Its lightweight formulation also allows for reduced consumption compared to traditional cement adhesive, with excellent application comfort.
Technical Information
- Type: Fiber-reinforced, water-repellent flexible adhesive mortar
- Color: Grey
- Packaging: 15 kg bag
- Application: Interior / exterior wall
- Properties: Flexible, water-repellent, no efflorescence
- Compatible substrates: Concrete, masonry, substrates prepared according to DTU
- Mixing proportions: approx. 6.75 L to 15.00 kg of water: ARDEX X 77 FLEX
- Bulk density: approx. 1.00 kg/l
Delivery & returns
Delivery & returns
Delivery costs based on the total weight of your order
The estimated amount for the chosen quantity is shown under the price and confirmed at checkout.
- Under 80 kg 60€
- 80 kg to 150 kg 80€
- 150 kg to 250 kg 120€
- 250 kg to 1.5 t 150€
- 1.5 t to 3 t 175€
- 3 t to 4.5 t 200€
- 4.5 t to 6 t 225€
- 6 t to 7.5 t 250€
- 7.5 t to 9 t 380€
- 9 t to 24 t 750€
- Over 24 t on quote
Technical Data Sheet
Technical Data Sheet
ID:115001036
View full details
Where can I see this product in store?
In Germany · 1 store
Minéral Saarwellingen
Alfred-Nobel-Allee 35, Campus Nobel, 66793 Saarwellingen
+49 6838 9799158
Opening hours
Monday: 08:00–12:00, 12:30–17:00
Tuesday: 08:00–12:00, 12:30–17:00
Wednesday: 08:00–12:00, 12:30–17:00
Thursday: 08:00–12:00, 12:30–17:00
Friday: 08:00–12:00, 12:30–17:00
Saturday: 09:00–13:00
Sunday: closed
Please note that our outdoor showroom is freely accessible 24/7.
Also on display in France: Lyon · Strasbourg · Nancy · Thionville · Beaune · Woustviller
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In the same material
One material: countless possibilities.
A family business, experts in natural stone since 1934
- 7 showrooms (France + Germany)
- +10,000 m² shipped every month
- Real stock, professional advice, delivery to France, Belgium, Luxembourg and Germany, no middlemen
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