* Color may vary between actual product and featured images. Always make your selection from an actual product sample.

ARDEX N 23 Microtec Rapid Set Natural Stone and Tile Mortar

Product temporary unavailable.

Please call for pricing on quantities less than 6 cartons.
Minimum order quantity: 250sqft.

Have questions? We're here to help.

  • Water ResistantWater resistant
  • Packaging40 lb. (18 kg) bag
  • Mixing Ratio6 1/4 - 6 3/4 quarts (6-6.5 liters) of water per 40 lb. (18 kg) bag For smaller batches, use 2.5 parts powder to 1 part water by volume

Rapid Set Natural Stone and Tile Mortar

Install moisture-sensitive natural stone, marble, and granite, including mosaics, over plywood, and other interior surfaces without discoloration, efflorescence, or warp.

  • Use for setting porcelain, quarry, and ceramic tile, mosaics, ungauged stone, translucent marble, glass and natural stone tile
  • Fast setting - grout in two hours
  • Ideal for moisture-sensitive natural stone tile
  • Self-drying technology - will not contribute to staining, warping or efflorescence
  • Outstanding coverage – 103 sq. ft. (9.5 sq. m) per bag with 1/4” sq. notch trowel
  • Thin- to medium-bed installation up to 5/8” (15 mm)
  • 1-hour pot life
  • Use for interior floors and walls
  • Extended open time of 30 minutes
  • Excellent bond strength and sag resistance
  • Available in 40 lb. bags (gray or white)
  • Gray - on sale for $44.50
  • White - on sale for $49.40

Description and Usage

ARDEX N 23 is a rapid-setting, thin-to-medium-bed mortar that is ideal for interior installations of moisture-sensitive natural stone, marble, granite, porcelain, quarry, and ceramic on horizontal or vertical surfaces. Recommended for all tile sizes, including mosaics, ARDEX N 23 is suitable for use over concrete floors with in-floor heating systems. ARDEX N 23 has proprietary ARDEX self-drying technology to prevent staining, discoloration, warping, and efflorescence. Easy to mix and apply with excellent bond strength and sag resistance, ARDEX N 23 has an open time of up to 30 minutes and 60-minute pot life.

Substrate Preparation

ARDEX N 23 adheres to both dry and damp substrates that are structurally sound, solid, and free from any contaminant that can act as a bond breaker. Plywood substrates must be dry, APA-rated, Type 1 exterior-grade plywood. Refer to ANSI A 108 AN-2 “General Requirements for Subsurfaces” and the Tile Council of North America’s “Handbook for Ceramic Tile Installation” for detailed information on surface preparation and guidelines for substrate construction. Wallboards must be dry, sound, and solidly anchored to structural components in the wall. The plane of wall surfaces must be plumb and true. Floor surfaces must have minimal variation in the plane or slope as outlined by the Tile Council of North America.

Should pre-leveling or subfloor repair be required, use ARDEX Liquid BackerBoard® Self-Leveling Underlayment for Interior Wood and Concrete Subfloors, ARDEX AM 100™ Rapid Set Pre-Tile Smoothing and Ramping Mortar, ARDEX TL 1000™ Tile Leveler, Self-Leveling Underlayment, ARDEX TL PATCH® Tile Leveler, Underlayment Patch and Skimcoat or ARDEX EB 2™ Fast Setting Screed Cement, as appropriate. Observe the instructions and dry times in the ARDEX technical brochures.

Per ANSI A 108 AN-3.7, expansion joints must be provided over existing moving joints and moving cracks and where Substrates materials change composition or direction.

Mixing and Application

For one 40 lb. (18 kg) bag of ARDEX N 23, use 6 1/4 - 6 3/4 quarts (6-6.5 liters) of clean water. To mix smaller quantities by hand, use 2.5 parts powder to 1 part water by volume. Pour water into the mixing container first, and then add the ARDEX N 23 while mixing for 2 to 3 minutes. For best results, mix with an ARDEX T-2 Ring Mixing Paddle and 1/2” heavy-duty drill (12 mm, min. 650 rpm). If mixing by hand, use a margin trowel and mix vigorously. Just prior to application on the substrate, the mixture should be stirred again to ensure a creamy, smooth, lump-free consistency.

SI O CLASSIFICATION: 13007 The pot life of ARDEX N 23 is approximately 1 hour at 70°F (21°C). Jobsite conditions and temperature may affect pot life. If the material begins to harden within this time, retemper with a drill and mixing paddle. DO NOT ADD MORE WATER!

Installation should proceed in accordance with ANSI A 108.5. After mixing, apply the mortar to the substrate with the flat side of a trowel to obtain a solid mechanical bond. Apply to an area no greater than that which can be covered with tile while the mortar remains plastic (approx. 30 minutes). Do not set tile or stone into the skinned over mortar. Comb the mortar with a notched trowel of sufficient depth to ensure that the tile or stone is covered uniformly over the entire surface. Follow the recommendations of the Tile Council of North America for proper transfer of ARDEX N 23 from the substrate to the tile or stone. The type and size of the tile or stone will dictate the size of the notched trowel to be used to achieve proper transfer. The position of the tile or stone may be adjusted for up to approximately 15 minutes after installation.


Floor and wall tiles can be grouted after 2 hours in accordance with ANSI 108.10 using ARDEX FL™ Rapid Set, Flexible, Sanded Grout, ARDEX FG-C™ Unsanded Floor and Wall Grout or ARDEX WA™ Epoxy Grout and Adhesive, as appropriate.

  • Water ResistantWater resistant
  • Packaging40 lb. (18 kg) bag
  • Mixing Ratio6 1/4 - 6 3/4 quarts (6-6.5 liters) of water per 40 lb. (18 kg) bag For smaller batches, use 2.5 parts powder to 1 part water by volume
  • Open TimeUp to approx. 30 minutes
  • Pot LifeApprox. 1 hour
  • Time to Grout2 hours
  • ColorsGray, White
  • StorageStore in a cool, dry area. Do not leave bags exposed to sun.
  • Shelf Life1 year, if unopened.
  • HeadingNatural Stone Mortars
  • DescriptionRapid Set Natural Stone and Tile Mortar
  • WarrantyARDEX Engineered Cements Standard Limited Warranty applies. Also eligible for the ARDEX SystemOne™ Warranty when used in conjunction with ARDEX grouts and ARDEX caulks.
  • Coverage1/4’’ x 1/4’’ x 1/4’’ Sq. Notch Trowel 103 sq. ft. (9.5 sq. m) 1/4’’ x 3/8’’ x 1/4’’ Sq. Notch Trowel 80 sq. ft. (7.4 sq. m) 1/2’’ x 1/2’’ x 1/2’’ Sq. Notch Trowel 57.5 sq. ft. (5 sq. m)


Home Residential Delivery

In most cases residential deliveries will be made with large tractor trailer trucks. These are the same large ones you see whizzing by you on the interstates. It's important, especially with home deliveries, the freight company is made aware of where it's going. If you have a driveway or road that's inaccessible for large trucks such as the one shown on the left, it will have to be offloaded at the closest point where you will be responsible for it from there. In these cases you may need a pickup or van to transfer the flooring from this point to your home.

Residential service is considered "curbside delivery". Curbside is defined as the truck will only go as far as the end of your driveway. Drivers will assist in handing down boxes from the truck but it will be your responsibility to get it into the home from there. Be prepared. Have plenty of able bodied help available. Boxes or cartons of prefinished flooring can weigh anywhere from 25 to 60 pounds depending on the species or style selected(solid or engineered).

In cases where there is hard asphalt or concrete, and the truck can get close to your home or business, a lift gate service is offered at an additional cost. Pallet jacks are often used(shown on the right) only if there's a smooth hard surface to roll it on. Any additional services on delivery not included on our signed order confirmation must be authorized by us.

With lift gate service, the driver will off load the pallet(s) and get it as close as possible to your home or business. If it can be rolled into the garage or another area where it will be protected from the elements, the better** In order to make a more pleasant experience for all, please be ready and accommodate the drivers as they have other places on their schedule. Clear pathways etc. Pallet jacks cannot be pushed up or down steep inclines.

Freight Terminal Pickup

Freight terminals are points we ship to in your region. They are large warehouses where products are staged for shipping to local addresses. There are two ways you can handle this method of freight. If you have a large enough vehicle such as a pickup truck or van, the freight guys will simply load the entire pallet onto your vehicle with a forklift away from the warehouse in the parking areas. If the pallet cannot fit, they will place it next to your vehicle where you will be responsible for loading the boxes into the vehicle.

Business Deliveries

If you happen to own a business, or know someone that owns a business, we can ship there for the same rate as shipping to a freight terminal. These businesses must be in a commercial area, and not work out of the home type. They must also be open during regular business hours with someone able and available to receive the flooring.

Count Everything Twice!

When a shipment is received, count everything with our checklist and the delivery receipt that will be provided from the trucking company during delivery or pickup. Make sure the number of boxes and other accessories have been received. In many cases transition (trim molding) pieces may be separate from the flooring pallet and packaged differently. It is not necessary to open boxes of flooring, but make sure the product description matches with what you have ordered. Transition pieces are generally shipped in boxes or round cardboard tubes ranging in length of 72" to 96" Widths or diameter average 3 or four inches. It is vital you open each one and compare to our checklist assuring you have received the correct ones. Check each container making sure you have received the correct amount, color, and style. We cannot be held responsible for shortages after the shipment is signed for.

Freight Damage

It can happen. Often only one or two pieces are damaged. How often does this happen? An accurate and honest answer is less than 2% of the time. Don't be alarmed if this happens to you! The damage affects six to seven inches on a few pieces and should not be a concern. What's not covered under freight damage? Today's prefinished hardwood flooring is packaged in corrugated cardboard, and strapped with plastic bands. Tears, broken bands, scuffed, or rippled packaging is not considered damage. Freight damage is exclusive to actual damage of the hardwood flooring itself. Damage to one or two boxes is not considered a total loss. Often a few pieces are affected as up to as many as 30 pieces can be contained in one box of hardwood flooring depending on the product purchased.Up to 3% of damage is considered to be acceptable for the waste factor . For damaged boxes we suggest opening them when you have it in your home to assess how much has been affected. Place all good pieces back in the original carton and don't open until the actual installation.

In the rare likelihood of freight damage, or items that have not been received, you must note it on the delivery receipt before you are finished receiving the shipment. Don't rely on the driver making notes. You must be specific and clear. We cannot be held responsible for damage or shortages after the shipment is signed for.

Notify us immediately of any freight damage or missing items. Even though you've made your notes while signing for the items, freight companies don't tell us about it. It will be your responsibility to contact us immediately to expedite any replacements. In the rare case of damaged freight, we also require taking digital pictures and sending them to us as soon as possible. The more information we receive, the quicker replacements will be on their way. Without written documentation of damaged freight or missing items we cannot proceed with any claims or replacements.

Refusing shipment for any reason without notifying us immediately will be considered a canceled order and you will pay all associated costs mentioned above.

Return Policy

  • All Returns & Exchanges must be approved by the distributor or manufacturer.
  • Unopened items may be returned within 7 days of receiving (once approved)All products returned must have 5 cartons (of the same color) for returns.
  • No sheet goods or rolls of material can be return under any circumstances.
  • All accessory products/adhesive cannot be return under any circumstances.
  • All returns are subject to a $75.00 minimum or 35% restocking fee.
  • Special order items can not be cancelled or returned.

You should expect to receive your refund within 30 business days of giving your package to the return shipper, however, in many cases you will receive a refund more quickly if processed online. This time period includes the transit time for us to receive your return from the shipper 5-10 business days, the time it takes us to process your return once we receive it 3-5 business days, and the time it takes your bank to process our refund request 5-10 business days.

Sale up to 42% OFF

Anderson Engineered Hardwood Flooring Sale

With a heavy focus on making a quality product, Anderson Tuftex designs their products with great care.

Found product you like?

Contact us and we will arrange professional
in-home measurement & estimate on the installation.