rejunte

Rejunte is the filler material used to fill the joints between tiles after installation. Its primary functions are to lock tiles in place, seal joints against moisture, and provide a finished appearance through color and texture. The term is commonly used in Portuguese-speaking countries and refers to both the material itself and the act of applying it, known as rejuntar.

There are several types of rejunte. Cementitious grout is the most common and is sold as a powder that is mixed with water or an additive. It can be unsanded for narrow joints (typically up to about 3 mm) or sanded for wider joints. Epoxy grout is a two-part or pre-mixed resin-based product that offers superior stain and chemical resistance and higher durability, especially in wet areas. Some grouts are urethane or polymer-modified cementitious formulations, designed to improve performance. The choice depends on joint width, location, load, and desired maintenance level.

Application typically involves cleaning the joints, mixing the grout to the correct consistency, and pressing it into joints with a rubber float. Excess grout is removed from the tile surfaces, and joints are finished with shaping before the material hardens. After curing, excess haze is cleaned and, in the case of cementitious grouts, sealing may be recommended to reduce staining and water absorption.

Maintenance considerations include regular cleaning with non-abrasive, pH-neutral cleaners and periodic resealing for cementitious grouts. Epoxy grouts are generally easier to maintain and more resistant to stains and water. Color options allow matching or contrasting with tiles, influencing the overall look of the tiled surface.