Mortar & Stucco Repair
Mortar & Stucco Repair is a 100% acrylic water-based product designed to repair cracks and defects in mortar, stucco, EIFS, stone, brick, or block. Textured for blendable repairs. Mildew and UV resistant. Available in Gray and Beige.
Colors:
MORTAR & STUCCO REPAIR is designed to repair cracks and defects in mortar, stucco, EIFS, stone, brick or block. This waterbased acrylic product is used to repair or seal surfaces, such as stucco, EIFS, mortar joints, grout joints, fiber cement board, block, brick, concrete, stone, tile, wood and more. This ready to use patch
combines Tower’s best durability, flexibility and adhesion for lasting repairs. This easy-to-apply, 100% acrylic water-based product is textured so repairs can be blended in. The cured material can be painted and is mildew and UV resistant.
- 1:Exceeds ASTM C-920, Type S, Grade NS, CLASS 12.5
- 2:Exceeds ASTM C-834 Type OP, Grade -18°C
- 3:Used for non-structural cracks or gaps up to 2”
- 4:Extreme Flexibility
- 5:Repair and waterproof cracks, gaps and defects in textured surfaces
- 6:Interior / Exterior
- 7:Paintable
- Stucco
- Tilt Wall
- EIFS
- Grout Joints
- Mortar Joints
- Cement Board
- Masonry
- Ceramic Tile
- Concrete
- Stone
- Brick
- Cement
Surfaces to be caulked must be dry and free of all dirt, dust, oil, mildew, loose paint, old caulk or other contaminates. Only apply when sealant, surface, and air temperature are above 40ºF and rising. Do not apply on surfaces that exceed 140ºF, or when rain is expected.
- Cut nozzle at a 45º angle. Cured bead should be between 1/8” and 2” wide. Use a foam backer rod for joints that exceed 1/2” in depth.
- Tool patch to match desired texture and profile of the surrounding area.
- Clean up uncured material and tools with soap and water.
- Allow 4 to 6 hours before painting.
Coverage: 55 linear feet for a 3/16” bead. Product will “skin-over” in 30 minutes. Product may take 4-5 days to reach full cure, temperature and humidity dependent.
NOT INTENDED FOR AREAS THAT WILL BE SUBMERGED IN WATER. KEEP FROM FREEZING. ALWAYS TEST FOR SUBSTRATE COMPATIBILITY.
Immediately after use, clean uncured material and tools with soap and water. Remove cured sealant by cutting with a sharp-edged tool.
- Vehicle: 100% Modified Acrylic Emulsion Polymer
- VOC: Non-chemically curing sealant. VOC (less exempt solvents) is <1.5%
- Pigment: Calcium Carbonate
- Solids: Approximately 70%
- Weight per Gallon: 10.0 ± 0.5
- Specific Gravity: Approximately 1.2
- Service Temp: -30ºF to 180ºF
- Temp Application Range: 40ºF and rising. Air temp no hotter than 95º and substrate not hotter than 140º
- Freeze Thaw Stability: Passes 5 Cycles@ 0ºF (1 cycle = 16hrs. @ 0ºF, 8hrs at 75ºF)
- Flash Point: None
- Consistency: Paste
- Applications: Interior / Exterior
- Shelf Life: 24 months when stored at 50ºF to 80ºF
- Coverage: 10.1 fl oz: 55 linear ft. at a 3/16” bead
- Odor: Mild Sweet Acrylic
- Tooling Time: 10 to 15 Minutes
- Tack Free Time: 30 Minutes
- Paint Over Time: 4 to 6 hours
- Full Cure: 4-5 days
Product resources
Mortar & Stucco Repair resources
Mortar & Stucco Repair Frequently Asked Questions
What size cracks and gaps can Mortar & Stucco Repair handle?
Non-structural cracks and gaps up to 2" wide. Use a foam backer rod for joints that exceed 1/2" in depth.
What surfaces and materials is it designed for?
Mortar, stucco, EIFS, stone, brick, or block — including mortar joints, grout joints, fiber cement board, tilt wall, and similar surfaces.
How long before I can paint over Mortar & Stucco Repair?
Allow 4 to 6 hours before painting.
How long until it's fully cured?
It skins over in about 30 minutes and reaches full cure in 4 to 5 days, depending on temperature and humidity.
What colors does Mortar & Stucco Repair come in?
Gray and Beige, both in a 10.1 fl oz cartridge.
What temperature can it be applied in?
Apply when sealant, surface, and air temperature are above 40°F and rising, with air no hotter than 95°F and substrate no hotter than 140°F. Once cured, it holds up across a -30°F to 180°F service temperature range.
What substrates does Mortar & Stucco Repair work on?
Masonry, ceramic tile, concrete, stone, brick, and cement.
Can Mortar & Stucco Repair be used in submerged areas?
No — it's not intended for areas that will be submerged in water, and it should be kept from freezing. Always test for substrate compatibility before full application.
What's the difference between Mortar & Stucco Repair and Concrete Repair?
Mortar & Stucco Repair handles wider gaps (up to 2" versus 1" for Concrete Repair), also exceeds ASTM C-920 Type S Grade NS Class 12.5 in addition to ASTM C-834, cures faster (skins over in 30 minutes and fully cures in 4–5 days versus 1 hour and 5–10 days), and comes in Gray or Beige. Concrete Repair is Gray only and is positioned specifically for horizontal surfaces like driveways and sidewalks, while Mortar & Stucco Repair is built for textured vertical surfaces like stucco, EIFS, and mortar joints.
Does Mortar & Stucco Repair come with a guarantee?
Yes. If the product ever cracks, peels, or separates after proper storage and application, Tower Sealants will replace it when the purchaser returns proof of purchase. Like Concrete Repair, this TDS doesn't state a specific number of years for the guarantee.
Technical Data Sheet
Mortar & Stucco Repair
Textured Masonry Repair Sealant
Description
Mortar & Stucco Repair is designed to repair cracks and defects in mortar, stucco, EIFS, stone, brick, or block. This water-based acrylic product is used to repair or seal surfaces such as stucco, EIFS, mortar joints, grout joints, fiber cement board, block, brick, concrete, stone, tile, wood, and more. This ready-to-use patch combines Tower's best durability, flexibility, and adhesion for lasting repairs. This easy-to-apply, 100% acrylic water-based product is textured so repairs can be blended in. The cured material can be painted and is mildew and UV resistant.
Performance Features
- Exceeds ASTM C-920, Type S, Grade NS, Class 12.5
- Exceeds ASTM C-834 Type OP, Grade -18°C
- For non-structural cracks or gaps up to 2"
- Extreme flexibility
- Repairs and waterproofs cracks, gaps, and defects in textured surfaces
- Interior / Exterior
- Paintable
Product Specifications
- Vehicle
- 100% Modified Acrylic Emulsion Polymer
- VOC
- Non-chemically curing sealant. <1.5% less exempt solvents
- Pigment
- Calcium Carbonate
- Solids
- Approximately 70%
- Weight per Gallon
- 10.0 ± 0.5
- Specific Gravity
- Approximately 1.2
- Service Temp
- -30°F to 180°F
- Application Temp Range
- 40°F and rising. Air no hotter than 95°F, substrate no hotter than 140°F
- Freeze-Thaw Stability
- Passes 5 cycles @ 0°F (1 cycle = 16 hrs @ 0°F, 8 hrs @ 75°F)
- Flash Point
- None
- Consistency
- Paste
- Applications
- Interior / Exterior
- Shelf Life
- 24 months when stored at 50°F to 80°F
- Coverage
- 10.1 fl oz: 55 linear ft. at a 3/16" bead
- Odor
- Mild sweet acrylic
- Tooling Time
- 10 to 15 minutes
- Tack-Free Time
- 30 minutes
- Paint Over Time
- 4 to 6 hours
- Full Cure
- 4 to 5 days
Packaging
- Item · UPC
- TS-00241 · 843034002431
- Item · UPC
- TS-00242 · 843034002424
Barcode conflict: this TDS lists UPC 843034002431 for Gray (TS-00241), but the Concrete Repair TDS lists that exact same UPC for a different item, TS-00243. One of these two UPC codes is likely a typo in the source documents — worth correcting at the source before either code goes into a scannable listing.
Applications
- Stucco
- EIFS
- Mortar joints
- Tilt wall
- Grout joints
- Cement board
Substrates
- Masonry
- Concrete
- Ceramic tile
- Brick
- Stone
- Cement
Surface Preparation
Surfaces to be repaired must be dry and free of all dirt, dust, oil, mildew, loose paint, old caulk, or other contaminants. Only apply when sealant, surface, and air temperature are above 40°F and rising. Do not apply on surfaces that exceed 140°F, or when rain is expected.
Application
- Cut nozzle at a 45° angle. Cured bead should be between 1/8″ and 2″ wide. Use a foam backer rod for joints that exceed 1/2″ in depth.
- Tool patch to match the desired texture and profile of the surrounding area.
- Clean up uncured material and tools with soap and water.
- Allow 4 to 6 hours before painting.
Coverage: 55 linear feet for a 3/16″ bead. Product skins over in 30 minutes and may take 4–5 days to reach full cure, temperature and humidity dependent.
Not intended for areas that will be submerged in water. Keep from freezing. Always test for substrate compatibility.
Clean-Up
Immediately after use, clean uncured material and tools with soap and water. Remove cured sealant by cutting with a sharp-edged tool.
Safety
Irritating to skin, eyes and respiratory tract. Harmful if swallowed, inhaled or absorbed through the skin. May cause allergic skin reactions and/or central nervous system depression. Adverse reproduction effects have been reported in animals. May cause adverse kidney effects. Avoid contact with eyes, skin and clothing. Use in a well ventilated area. Wear eye, skin, and respiratory protection. Eye contact: immediately flush with water for 15 minutes and get medical attention immediately. If swallowed: do not induce vomiting; give large quantities of water and get medical attention. Never give anything by mouth to an unconscious person. For health information, refer to the Safety Data Sheet or call ChemTrec at 800-424-9300. Keep out of reach of children.
⚠ Cancer and Reproductive Harm — go to www.P65Warnings.ca.gov for additional information.
First Aid
In case of skin contact, wash off quickly with plenty of soap and water and remove contaminated clothing. For eye contact, flush eyes immediately with large quantities of water for at least 15 minutes. If swallowed, obtain medical treatment immediately — do not induce vomiting. If inhalation causes physical discomfort, move to fresh air; if discomfort persists or any breathing difficulty occurs, seek medical help.
Safety Data Sheets (SDS) are available upon request via towersealants.com or by calling 866-897-7568.
Manufacturer
Tower Sealants, LLC · 2095 Memorial Park Road, Gainesville, GA 30504
Customer Service: 866-897-7568 · Information: tech@towersealants.com · towersealants.com