Modified gypsum based mixture with high strength and extended open time, for filling, leveling and mortaring gypsum board, gypsum fiberboard, etc.


- increased strength and flexibility after drying

- water regulating capacity

- improved crack resistance

- thick and elastic consistency without lumps

- high adhesion with the base

- easy mortaring and sanding

- excellent filling properties

- extended open time with the solution


Scope of use

TERAFLEX® JOINT FILLER FOR GYPSUM BOARD is modified gypsum based product, designed for manual filling, leveling and mortaring joints, used for installation of gypsum boards, gypsum fiberboards et cetera, as well as their overall mortaring. It is also applicable for grouting gypsum blocks and interior decorative moldings and ornaments.

The modifiers inside the product quickly absorb added water and therefore, preventing its penetration into the structure of the joint. The solution has thick and elastic consistency with constant volume. It does not form lumps and eases mortaring and handling. The extended open time ensures enough time for processing and provides full usage of the solution.

TERAFLEX® JOINT FILLER FOR GYPSUM BOARD has high adhesion and excellent filling properties. The modifiers in the mixture increase the strength and flexibility of the final coat and  its  resistance to  cracking. The  fine  structure and  the special composition of the product provides the necessary smoothness of the filled joint as well as its smooth sanding and final painting.



3B according to BDS EN 13963

Reaction to fire А1 according to BDS EN 13501


Indicative consumption

about 0,5 kg/m2 for 1 mm layer
Application rate is average and highly depends on the type and the structure of the base!



5 kg paper bags.