Ardex X 3 PLUS LHT Large and Heavy Tile and Stone Mortar, 40 lbs, Polymer-Modified Mortar for Porcelain, Ceramic and Natural Stone Tile, Gray, 38025

Product Features:

• High-performance LHT tile mortar designed for large format tile and natural stone installations on floors and walls
• Polymer-modified cement mortar with excellent bond strength and long open time for professional-grade applications
• Ideal for large and heavy tile (LHT), porcelain, ceramic, granite, marble, and natural stone in residential or commercial spaces
• Non-sag and non-slump formula ensures easy vertical application and reduced lippage on floors
• Interior and exterior use on properly prepared concrete, cement backer board, gypsum, and even existing tile surfaces
• Meets ANSI A118.4 and A118.11 standards, approved for use over exterior grade plywood and heated floor systems
• Smooth and creamy consistency with extended pot life for easy troweling and superior handling
• Medium bed thickness up to 3/4” supports heavy tile without compromising leveling
• Perfect for showers, patios, kitchens, bathrooms, fireplaces, balconies, and wet areas
• Trusted by tile contractors and installers for floor tile adhesive and wall tile mortar performance that lasts

Product Description:

ARDEX X 3 PLUS LHT Large and Heavy Tile and Stone Mortar is a high-performance polymer-modified mortar specially formulated for the installation of large format tiles, natural stone, porcelain, and heavy ceramic tiles on floors and walls. This versatile, easy-to-apply thinset mortar is ideal for both interior and exterior tile installations and offers excellent non-sag and non-slump properties. Designed for demanding applications, ARDEX X 3 PLUS provides superior bond strength, extended open time, and outstanding coverage, making it the professional's choice for commercial and residential tile projects.

Whether you're setting tiles on concrete, cement backer board, or properly prepared gypsum surfaces, this premium mortar ensures long-lasting durability and performance. It is perfect for large and heavy tile (LHT) applications, including high-traffic areas, wet environments, and exterior walls.

ARDEX X 3 PLUS meets ANSI A118.4 and A118.11 standards and can be used over a variety of substrates including plywood and existing tile. With its creamy consistency and extended pot life, it ensures smoother troweling and easier handling. Suitable for medium bed applications up to 3/4", this professional-grade tile mortar reduces lippage and promotes a flatter tile surface. Use ARDEX X 3 PLUS for installing porcelain tile, ceramic tile, granite, travertine, and other natural stone. Ideal for showers, kitchens, patios, backsplashes, and heated floor systems. Achieve strong adhesion, flexible strength, and lasting results with this premium-grade tile and stone mortar for large format installations.

Installation

Mixing Ratio: 5 1/4 – 6 quarts (5 – 5.6 L) of water per 40 lb. (18 kg) bag.
(For smaller batches, use 2 1/2 parts powder to 1 part water by volume)

Approximate Coverage per 40 lb. (18 kg) bag:

1/4” x 1/4” x 1/4” Sq. Notch Trowel; 90 sq. ft. (8.4 sq. m)

1/4” x 3/8” x 1/4” Sq. Notch Trowel; 65 sq. ft. (6 sq. m)

1/2” x 1/2” x 1/2” Sq. Notch Trowel; 45 sq. ft. (4.2 sq. m)