Elimina la necessità di viti o rivetti, consentendo ai pannelli di mantenere un aspetto architettonico pulito e senza giunture.
TWEHA PreFix X-tra
2-component epoxy surface improver for porous façade materials
TWEHA PreFix X-tra is a high-performance, two-component epoxy surface improver, specially developed for the pre-treatment of porous façade and cladding materials such as fiber cement, natural stone and other mineral-based substrates.
Porous materials can absorb and transport moisture through their internal pore structure. Under long-term exposure, moisture at or close to the adhesive interface may adversely affect the durability of the bonded connection. TWEHA PreFix X-tra penetrates and closes the pores at the bonding surface, creating a more stable and controlled interface for the TWEHA adhesive system.
Unlike a conventional adhesion primer, TWEHA PreFix X-tra is primarily a surface improver. Its function is to modify and stabilize the porous substrate and reduce the influence of moisture at the bonding interface rather than compensate for insufficient adhesive performance.
TWEHA PreFix X-tra must be applied to a properly prepared, dry, clean and contamination-free bonding surface in accordance with the applicable TWEHA Instructions for Use.
At standard laboratory conditions of 23 °C and 50% relative humidity, the declared curing time is approximately 12 hours, with a skin-forming time of approximately 30 minutes. Actual processing and curing times are influenced by ambient and substrate temperature.
Because porosity, mineral composition, surface treatment and production processes can vary considerably between façade materials, the use of TWEHA PreFix X-tra must always be based on the applicable TWEHA Technical Data Sheet and the current Tested & Approved recommendations.

Progettato per garantire prestazioni ed efficienza
Progettato per garantire un incollaggio affidabile


TWEHA PreFix X-tra is particularly suitable for:
TWEHA PreFix X-tra is particularly suitable for fiber cement façade panels, natural stone with a porous bonding surface, and porous ceramic and mineral-based materials, as well as concrete and cement-bonded substrates. It is designed for stone-like façade materials with significant moisture absorption, and for surfaces where moisture transport may influence the durability of the adhesive connection, stabilizing porous bonding surfaces prior to adhesive application. Suitable for both interior and exterior bonded wall-cladding systems, it is used in combination with TWEHA PanelMate or TWEHA StoneMate where specified, tested and approved, as well as with other porous façade materials following TWEHA adhesion and durability assessment.
Un sistema di incollaggio completo
Tutti i prodotti TWEHA fanno parte del Tweha Bonding System. Per una corretta applicazione del sistema, fare sempre riferimento alle schede tecniche e agli elenchi dei supporti approvati.
Domande tecniche
Trova risposte rapide alle domande tecniche più frequenti su StoneMate.
PreFix X-tra is a solvent-free two-component epoxy/amine surface improver for selected façade substrates.
It is primarily used on fibre cement and porous substrates where improved and durable adhesion is required.
Add the complete Component B to Component A and mix thoroughly for at least 2 minutes until homogeneous.
The mixed product should be processed within approximately 30 minutes.
Allow a minimum of approximately 12 hours drying time before starting the bonding procedure.


Più efficiente, più economico
Rispetto ai tradizionali sistemi di fissaggio meccanico, i sistemi di incollaggio TWEHA consentono di ridurre i costi di installazione fino al 40%.
Un'installazione più rapida, un numero inferiore di componenti e l'assenza di elementi di fissaggio a vista comportano vantaggi sia economici che estetici.