Liana began as a manufacturer of door and window gaskets and, over the years, has built up extensive experience in the design and production of extruded technical profiles for windows, doors, PVC and aluminium systems, and glass facades. The sector’s continuous evolution has led us to develop high-performance plastic solutions capable of meeting the insulation, sealing and durability requirements of modern closure systems.
Our in-depth knowledge of thermoplastic and polyurethane materials enables us to manufacture custom gaskets and made-to-measure profiles for door, window and curtain wall manufacturers. Each solution is designed to ensure high technical performance, dimensional accuracy and seamless integration with the system in which it is installed.
Some examples of application fields.
Our solutions are used for wooden, PVC and aluminium doors and windows, entrance doors, sliding systems and structural glazing. The profiles and gaskets developed by Liana help improve thermal and acoustic insulation, weather protection and long-term reliability, meeting the varied design requirements of door and window manufacturers.





