UltraBond is a premium polymer fortified, adhesive mortar for the installation of thin brick, synthetic and natural stone products, ceramic tile and quarry tile.  UltraBond Veneer Mortar Adhesive mixes easily with water to a creamy consistency and is formulated with high initial grab and shear resistance.

  • Non Sag
  • Strong adhesion with Thin Brick and synthetic stone products
  • Class Leading shear and bond strength
  • Mixes easily with good open time
  • Freeze stable in dry form
  • Convenient, mixes with water


VOC: 0
Shipping Locations: 30058 • 77474• 84651

Packaging: 50lb (22.7kg) bag

Shelf Life: 1 year

Approximate Coverage for Vertical Applications

square foot (square meter)

1/4” x 3/8″ (6 mm x 9 mm) Notched Trowel 60–70 (5.6–6.5)
1/2″ x 1/2″ (12 mm x 12 mm) Notched Trowel 40–45 (3.7–4.2)
Adhered Masonry Veneer Application Method 30–33 (2.8–3.1)

Test Results

Compression (ASTM C270)
24 hours – 383 psi
7 day – 1372 psi
28 day – 2785 psi
Shear Bond (ANSI A118.15)
7 day dry – 389 psi
7/7 wet/dry – 246 psi
28 day dry – 537 psi
28 day water immersion – 328 psi
Sag Resistance
(ISO 13007 24.2)
Quarry Tile – 0.0
Large Scale Tile – .485
Full Scale Stone – 0.0

Approved Substrates

Stucco (Scratch or Brown)
Mortar Parge Coat
Master Wall Base Coats
Metal Lath

Adheres to Rollershield
Others approved in writing

Application Procedure

Job Conditions – Air and substrate temperature for application of UltraBond must be 40°F (5°C) or higher and must remain 40°F (5°C) or higher for a minimum of 24 hours. Provide temporary protection to protect the wall system from damage until permanent flashings, caps and sealants are installed.  Store materials within prescribed temperature limits and out of direct sunlight. Working and drying times are based upon normal room temperature conditions and will vary with temperature and humidity.

Installer must verify that deflection under all live, dead and impact loads of substrates does not exceed industry standards of L/600 for AMSMV units or stone installations where L=span length. For exterior vertical installations over framed construction, the substrate deflection under all live, dead and impact loads, including concentrated loads, must not exceed L/600 where L=span length.

Preparation – The substrate must be approved by Master Wall Inc®., clean, dry, structurally sound and free of efflorescence, oil, grease, form release agents and curing compounds or anything that would affect bond. Painted surfaces are not acceptable and must be removed.

Mixing – Add 5 to 6 quarts (4.7-5.7 L) of potable water to a clean plastic pail. Add the UltraBond slowly while stirring using a heavy-duty 1/2” (12.7 mm) drill at 400 – 500 rpm and a heavy-duty Mixer. Mix thoroughly to a homogeneous consistency. Let the mixture stand for 5 to 10 minutes and then remix without adding any more water or powder. During use, stir occasionally to keep mix fluffy. DO NOT temper with water. Excessive stirring may cause faster setting and reduced working time. Do not add accelerators or retarders to the UltraBond mixture.

For adhered stone, thin brick and manufactured stone masonry veneers installations, use a gauging trowel to key a thin coat of UltraBond Veneer Mortar Adhesive to cover entire back of the veneer units. Spread additional mortar onto the back of the skim coated veneer sufficient to completely fill the space between the veneer and the substrate when compressed against the substrate. Press the mortar covered back of the veneer against the substrate at the desired final position. Slide the unit roughly 1 -1.5” (25-38 mm) diagonally from the desired final position and back into the desired position while maintaining even pressure. This should be done in such a manner as to squeeze the mortar to fill the entire space between the veneer unit and the substrate, allowing excess mortar to extrude on all sides around the veneer unit. Clean excess extruded mortar with trowel and spread onto the next veneer unit to be installed.

Note: Prior to installation, ensure back of veneer units are clean of dust, laitance, loose concrete crumbs and any excess film that could impede bond.

Alternate method for thin brick, tile, calcium silicate unit and stone installations: key UltraBond Veneer Mortar Adhesive into the substrate thoroughly. Then, comb on additional mortar with the notched side, use 1/4″ x 3/8″ (6 mm x 9 mm),1/2″ x 1/2″ (12 mm x 12 mm) loop or notch trowel. Back butter all thin brick, veneer units 8″ x 8″ (200 mm x 200 mm), ¾ (19 mm) loop trowel or larger to provide full bedding of the veneer. Place veneer into the mortar and adjust to desired position. Clean any excess mortar on sides of stone or tile veneer.

Note: Use proper sized notched trowel to ensure full bedding of the stone veneer. Spread only enough mortar for maximum coverage with tile within 15–20 minutes. Trowel notch size determined by contractor, size of veneer and job-site coverage. Adjust as necessary. Check mortar for complete coverage by periodically removing veneer unit and inspecting the transfer onto substrate and back of the stone veneer. The size and weight of the veneer will vary. Due to job site conditions and differences in finish material types; ledger boards, shims, wedges or spacers may be required to maintain finish levels and heights.

Grouting/Pointing (if required)
When required, point installation after a minimum of 24 hours curing time at 70°F (21°C). With an approved premium grout or mortar.

Clean Up—Tools and equipment can be cleaned with soapy water while the UltraBond is still wet.

If sanding or scraping are performed, ventilate work area and/or use a NIOSH/MSHA-approved respirator in accordance with our Safety Data Sheet.

Information contained in this product data sheet conforms to the standard detail recommendations and specifications for the installation of Master Wall® Inc. products and is presented in good faith. Master Wall® Inc. assumes no liability, expressed or implied as to the architecture, engineering, or workmanship of any project. This information may be concurrent with, or superseded by other applicable documents, such as specifications and details. Contact Master Wall® Inc. for the most current product information.

Additional Information