Ardex X 78 Microtec Fiber Reinforced, Semi-Pourable, Polymer Modified Mortar, Flooring Underlayment for Tile and Stone, 40 Lbs Bag, Gray

Product Features:

• Designed specifically for large format tile installations, including large porcelain tile, ceramic tile, mosaic tile, marble tile, granite tile, and most natural stone tile, ensuring excellent coverage and consistent results on both floors and walls.
• Extended open time of up to 60 minutes, which is approximately double the ISO standard, allowing installers more flexibility for precise tile placement, alignment, and adjustment during demanding installations.
• Exceptional coverage of up to 105 sq. ft. per bag when used with a 1/4" square-notch trowel, helping reduce material waste and improve installation efficiency on large tile projects.
• Formulated with advanced Microtec technology to deliver unmatched shear resistance, superior bond strength, and enhanced flexibility, making it ideal for high-traffic residential and commercial areas.
• Polymer-modified thin-set mortar engineered to accommodate minor substrate movement, thermal expansion, and structural stress without compromising adhesion or performance.
• Suitable for use over a wide range of substrates, including concrete, masonry, cement backer board, exterior-grade plywood, and compatible uncoupling membranes.
• Excellent performance in wet and intermittent wet areas such as bathrooms, kitchens, showers, steam rooms, pool surrounds, spas, and other moisture-exposed environments.
• Creamy, smooth, and easy-to-mix consistency that allows for effortless troweling, improved transfer, and excellent contact, often eliminating the need for back-buttering in most installations.
• Meets or exceeds ANSI A118.4 and ANSI A118.11 standards, ensuring reliable performance for both interior and exterior tile and stone applications.
• Trusted by professional tile installers and contractors for demanding installations requiring long working time, high bond strength, and consistent results.

Product Description:

Ardex X 78 Microtec is a premium, high-performance polymer-modified thin-set mortar engineered for demanding tile and stone installations where superior bond strength, flexibility, and extended working time are essential. Developed by ARDEX, this advanced mortar incorporates Microtec technology to deliver exceptional shear resistance, outstanding coverage, and reliable adhesion for large format tile installations.

This innovative thin-set mortar is especially suited for installing large porcelain tile, ceramic tile, mosaic tile, marble tile, granite tile, and most natural stone tile over a wide range of interior and exterior substrates. Ardex X 78 offers an extended open time of up to 60 minutes, providing installers with ample time for accurate tile placement, alignment, and adjustments without sacrificing bond performance.

Its unique semi-pourable, creamy consistency makes mixing and application effortless, improving workability while ensuring excellent contact between the tile and substrate. In many cases, the superior transfer characteristics reduce or eliminate the need for back-buttering, saving time and labor on large-scale projects. With coverage of up to 105 sq. ft. per bag using a 1/4" square-notch trowel, Ardex X 78 helps maximize efficiency and minimize material waste.

Ardex X 78 Microtec is ideal for use in high-traffic residential and commercial environments, including kitchens, bathrooms, showers, swimming pool surrounds, steam rooms, spas, and other areas subject to moisture and movement. It performs exceptionally well over concrete, masonry, cement backer boards, exterior-grade plywood, and compatible uncoupling membranes. Designed to meet or exceed ANSI A118.4 and A118.11 standards, this mortar delivers long-term durability, flexibility, and peace of mind for professional installers and serious DIY tile projects alike.