Ardex E 90 Mortar Admix Tile and Stone Mortar Enhancer – 1 Gallon

Enhance your tile and stone installations with Ardex E 90 Mortar Admix, a high-performance synthetic additive designed to improve the strength, flexibility, and water resistance of select Ardex thin-set mortars, including X 5, X 77, X 78, X 32, S 28 and N 23. This latex-based mortar admix transforms standard mortars into highly deformable, water-repellent adhesives, ideal for demanding tile installations in wet areas such as showers, steam rooms, swimming pools, and exterior walls. When mixed per Ardex guidelines, E 90 enhances bond strength and achieves ISO 13007 S2 classification for deformability, allowing for reliable installations in areas subject to movement or thermal variation. It reduces efflorescence and allows tile-over-tile installations without surface grinding or priming, making it an efficient solution for tile overlays on existing ceramic or porcelain surfaces. Suitable for interior and exterior applications, Ardex E 90 is VOC-compliant and compatible with radiant heated floors and uncoupling membranes. It improves mortar performance in high-traffic zones and ensures long-term durability for porcelain, ceramic, glass, quarry, and natural stone tiles. Its low-odor, freeze-thaw-stable formula is ideal for residential and commercial environments. The recommended mixing ratio varies depending on the mortar type, typically 2 quarts of E 90 with 4 quarts of water per 40 lbs of mortar. Use a heavy-duty 1/2″ drill and mixing paddle for lump-free consistency. Apply using a notched trowel suitable for tile size and substrate. Whether tiling over concrete, plywood, existing tile, or cement backer board, Ardex E 90 delivers enhanced adhesion and flexibility. This mortar enhancer is trusted by professional contractors for waterproof tile installations and is part of the complete Ardex tile and stone installation system. Made in the USA, this jug is your solution for long-lasting, high-performance tile bonding in moisture-sensitive or movement-prone environments.

Enhanced Adhesion and Flexibility: Improves mortar performance for all tile types, ensuring durability and stability.
Water-Repellent Properties: Ideal for wet areas such as showers and swimming pools, reducing the risk of efflorescence.
Direct Tile-on-Tile Application: Allows tile installation over existing tiles without the need for profiling or priming.
Compatible with In-Floor Heating Systems: Perfect for modern installations over underfloor heating.
Ideal for Glass Tile Installations: Achieves precise results along swimming pool water lines when paired with ARDEX X 77 White.