assa AZ 59 FLEX Flexible Tile Adhesive S1 – Standard Set Tile Adhesive for Walls & Floors Fassa AZ 59 FLEX is a premium S1 flexible cement-based tile adhesive, designed for fixing a wide range of wall and floor tiles in both internal and external applications. With its standard setting time, it offers excellent workability, allowing professional tilers and DIY users plenty of time to position and adjust tiles for a precise finish. Suitable for ceramic, porcelain, porcelain gres, clinker, terracotta, mosaic and natural stone tiles that are not sensitive to moisture or staining, AZ 59 FLEX delivers exceptional bond strength and long-lasting performance. Its S1 flexibility classification helps absorb movement caused by temperature changes and substrate expansion, making it an ideal adhesive for underfloor heating systems, balconies, terraces, bathrooms, kitchens and swimming pools. Compatible with a wide variety of substrates including cement screeds, concrete, plasterboard, gypsum plaster, cementitious waterproofing systems, existing tiled floors and heated floor systems, AZ 59 FLEX provides a reliable solution for demanding residential and commercial tiling projects.