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.
