Natural stone - outdoor
Outdoor Stone Adhesive - KTF55
Outdoor Stone Adhesive - KTF55
✔ Suitable for indoor/outdoor use✔ Compensates for substrate thickness variations✔ Can be applied in thicknesses from 3 to 20 mm✔ Ideal for large formats and irregular natural stones✔ Suitable for underfloor heating✔ Very good adhesion and mechanical strength
- Weight25 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 03 60 12 33 53.
Family business
Since 1934
7 stores
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Description
Description
Comparison of recommended adhesives
|
LARGE FORMAT
TILES
|
OUTDOOR
YOU ARE HERE ↓
|
INDOOR
STONE
|
CLADDING
STONE
|
||
|---|---|---|---|---|---|
| Materials | Tiles, porcelain stoneware, natural stone | Tiles, porcelain stoneware, natural stone | Natural stone (travertine, Burgundy, opus) | Light natural stone, marble, travertine | Cladding stone |
| Usage | 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 constrained substrate | Wall |
| Specificity | Economical solution | Flexible, high resistance | Compensates for thickness | Flexible, protects light stone | Very high adhesion |
| Underfloor heating | ❌ No | ✔ Yes | ✔ Yes | ✔ Yes | ✔ Yes |
| Outdoor | ✔ Possible | ✔ Ideal | ✔ Ideal | ✔ Possible | ✔ Yes |
FLEX TRASS KTF 55 ADHESIVE MORTAR
Murexin KTF 55 is a reinforced flexible adhesive designed for laying natural stone, tiles and porcelain stoneware indoors and outdoors.
Its great strength lies in its ability to work in thick layers, allowing loading from 3 to 20 mm depending on the needs of the site. It is particularly suitable for large formats as well as natural stones with variations in thickness.
KTF 55 is particularly suitable for:
- travertines and natural stones,
- outdoor paving,
- large formats,
- substrates with slight irregularities,
- and renovations over old tiles.
Its flexible formulation offers excellent adhesion and very good laying comfort, while allowing for better compensation of level or thickness differences often encountered with natural stone.
This adhesive is a particularly safe solution for technical installations where a standard adhesive does not allow sufficient correction under the elements.
Technical information
- Type: Thick-layer flexible adhesive mortar
- Colour: Grey
- Packaging: 25 kg bag
- Laying thickness: 3 to 20 mm
- Application: Indoor/outdoor floor and wall
- Underfloor heating compatible: Yes
- Compatible substrates: Concrete, screed, old tiles, substrates prepared according to DTU
Limits of use
Not suitable for unstable or unprepared substrates
Does not replace significant structural levelling
Positioning
Murexin KTF 55 is a thick-layer flexible adhesive for technical installations of natural stone and large formats. It is particularly suitable for paving with thickness variations or for substrates requiring more correction than a traditional adhesive.
Consumption: Consumption according to notch size: approx. 1.8 kg/m² for a 6 mm notch, approx. 2.4 kg/m² for an 8 mm notch, approx. 3.1 kg/m² for a 10 mm notch
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:68008
View full details
Where can I see this product in store?
In France · 6 stores
Minéral LyonGivors (69)
Rte de Rive de Gier, 69700 Givors
04 78 07 14 75
Opening hours
Monday: 08:00–12:00, 13:30–17:00
Tuesday: 08:00–12:00, 13:30–17:00
Wednesday: 08:00–12:00, 13:30–17:00
Thursday: 08:00–12:00, 13:30–17:00
Friday: 08:00–12:00, 13:30–17:00
Saturday: closed
Sunday: closed
Please note that our outdoor showroom is freely accessible 24/7.
Minéral StrasbourgBischheim (67)
6b rue de l'Atome, ZI Bischheim-Hoenheim, 67800 Bischheim
03 88 19 66 49
Opening hours
Monday: 08:00–12:00, 13:30–17:30
Tuesday: 08:00–12:00, 13:30–17:30
Wednesday: 08:00–12:00, 13:30–17:30
Thursday: 08:00–12:00, 13:30–17:30
Friday: 08:00–12:00, 13:30–17:30
Saturday: 09:00–13:00
Sunday: closed
Please note that our outdoor showroom is open to the public 24 hours a day.
Minéral NancyChampigneulles (54)
Zone Commerciale, Rue des Baraques, 54250 Champigneulles
03 83 96 10 11
Opening hours
Monday: 08:00–12:00, 13:30–17:30
Tuesday: 08:00–12:00, 13:30–17:30
Wednesday: 08:00–12:00, 13:30–17:30
Thursday: 08:00–12:00, 13:30–17:30
Friday: 08:00–12:00, 13:30–17:30
Saturday: 09:00–13:00
Sunday: closed
Our outdoor showroom is accessible during our opening hours.
Minéral ThionvilleThionville (57)
Zone des Bateliers, 6 Rue des Balanciers, 57100 Thionville
03 82 53 99 26
Opening hours
Monday: 08:00–12:00, 13:30–17:30
Tuesday: 08:00–12:00, 13:30–17:30
Wednesday: 08:00–12:00, 13:30–17:30
Thursday: 08:00–12:00, 13:30–17:30
Friday: 08:00–12:00, 13:30–17:30
Saturday: 09:00–13:00
Sunday: closed
Our outdoor showroom is accessible during our opening hours.
Minéral BeauneLadoix-Serrigny (21)
D974 Rte de Beaune, 21550 Ladoix-Serrigny
03 80 26 41 52
Opening hours
Monday: 08:00–12:00, 13:30–17:30
Tuesday: 08:00–12:00, 13:30–17:30
Wednesday: 08:00–12:00, 13:30–17:30
Thursday: 08:00–12:00, 13:30–17:30
Friday: 08:00–12:00, 13:30–17:30
Saturday: 09:00–13:00
Sunday: closed
Please note that our outdoor showroom is freely accessible 24/7.
Eberhart WoustvillerWoustviller (57)
44 rue de Nancy, 57915 Woustviller
03 60 12 33 53
Opening hours
Monday: 08:00–12:00, 14:00–17:30
Tuesday: 08:00–12:00, 14:00–17:30
Wednesday: 08:00–12:00, 14:00–17:30
Thursday: 08:00–12:00, 14:00–17:30
Friday: 08:00–12:00, 14:00–17:30
Saturday: 09:00-13:00
Sunday: closed
Please note that our outdoor showroom is freely accessible 24 hours a day.
Also on display in Germany: Saarwellingen
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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






