SEF 666 / SEF 666 WHITE is a high-performance, polymer-modified adhesive classified as C2TE and Type 2 specially formulated for interior and exterior wall applications. It is ideal for large-format ceramic, vitrified, semi-vitreous tiles, marble, granite, and natural stones. With excellent adhesion and an extended open time of up to 30 minutes, it is perfect for vertical installations such as wall cladding, façades, and door/window frame fixing. Its strength, versatility, and reliability make it suitable for both residential and commercial projects, even in hot climates.