WaterArmor Liquid Waterproofing & Crack Isolation Membrane
WaterArmor® Liquid Waterproofing & Crack Isolation Membrane, formerly known as SealGuard, is a ready-to-use 100% acrylic waterproofing membrane designed for use beneath thin-set tile and stone installations on horizontal and vertical surfaces. If you are searching for SealGuard waterproofing membrane, SealGuard liquid membrane or SealGuard crack isolation membrane, WaterArmor is the current product name for this waterproofing system.
WaterArmor creates a continuous waterproof layer over approved substrates and can help isolate cracks and substrate changes up to 1/8 inch when properly reinforced with fiberglass mesh tape according to the manufacturer's instructions. It can be applied by brush, roller or trowel and bonds directly to clean metal, PVC and ABS drain assemblies.
WaterArmor is suitable for approved residential and commercial interior and exterior applications. It can be applied over concrete, cement backerboard, brick, masonry, mortar beds and other approved substrates. For interior dry installations, it may also be used over exterior-grade plywood where permitted by the manufacturer.
WaterArmor meets the requirements of ANSI A118.10 for waterproof membranes beneath thin-set tile and stone. Its ready-to-use formulation requires no mixing with water or other additives, making it a practical waterproofing solution for shower walls, bathroom floors, tile floors, walls and other approved wet-area applications.
Why Use WaterArmor Waterproofing Membrane?
Tile and grout are not themselves a complete waterproofing system. Water can migrate through grout joints, tile edges, penetrations and other areas of a tile installation. A properly installed waterproofing membrane helps protect the substrate and surrounding construction from water intrusion before the tile is installed.
WaterArmor is designed to provide a continuous waterproofing layer beneath thin-set tile and stone while also providing crack isolation when used with the required fiberglass mesh reinforcement. This makes it particularly useful for installations where moisture protection and protection against minor substrate cracking are important.
- Ready-to-use liquid waterproofing membrane
- 100% acrylic-based formulation
- Designed for use beneath thin-set tile and stone
- Meets ANSI A118.10 requirements
- Provides waterproofing over approved substrates
- Can provide crack isolation for cracks up to 1/8 inch when properly reinforced
- Apply with a brush, roller or trowel
- Suitable for residential and commercial applications
- Suitable for interior and exterior applications where permitted
- Bonds directly to clean metal, PVC and ABS drain assemblies
- Contains antimicrobial protection that inhibits growth of bacteria, mold and mildew on the surface of the dried membrane
- Low VOC formulation suitable for projects seeking low-VOC materials
- Flood testing can begin after the required minimum cure period
Common WaterArmor Applications
WaterArmor can be used beneath tile and stone in a variety of residential and commercial applications. Proper substrate preparation, drainage and installation procedures are essential for any waterproofing system.
- Shower walls and shower areas
- Bathroom floors and walls
- Tile floors
- Kitchen and commercial kitchen areas
- Lavatories
- Fountains
- Interior and exterior tile installations where approved
- Residential remodeling projects
- Commercial tile installations
- Concrete and masonry surfaces
- Cement backerboard installations
- Mortar beds
Wet areas must be properly sloped toward the drain according to applicable tile industry and building requirements. WaterArmor is not intended to correct drainage problems or replace proper substrate preparation.
WaterArmor for Shower Waterproofing
WaterArmor is well suited for shower waterproofing beneath tile when installed according to the manufacturer's instructions and applicable tile installation standards. The liquid-applied membrane can be used to create a continuous waterproof layer across properly prepared shower walls and floors, including transitions and other areas that require additional attention.
Edges, corners, coves, floor-to-wall transitions and other changes in the substrate should be pre-treated with WaterArmor and fiberglass mesh reinforcement as specified. This helps reinforce areas where different planes or substrate sections meet.
Before beginning a shower waterproofing project, make sure the substrate is structurally sound, clean, dry and free of contaminants that could interfere with adhesion. The shower floor must also have the proper slope toward the drain.
WaterArmor Crack Isolation
WaterArmor can be used as a crack isolation membrane to help prevent certain cracks and substrate changes from transferring through a tile or stone installation. Cracks or substrate changes up to 1/8 inch can be treated with WaterArmor and fiberglass mesh tape according to the manufacturer's installation instructions.
For cracks in concrete floors, center the fiberglass mesh tape over the crack and embed the tape into fresh WaterArmor. Non-continuous corners, coves and in-plane substrate changes should also be reinforced with fiberglass mesh tape where required.
WaterArmor is not intended to bridge dynamic joints such as expansion, control or cold joints. It is also not intended to isolate cracks larger than 1/8 inch or cracks caused by excessive structural movement.
Approved Substrates
WaterArmor is designed for application over approved, properly prepared substrates. The current manufacturer information identifies the following approved substrate types and systems:
- Concrete
- Cement backerboard
- Brick
- Masonry
- ProTEC®
- Util-A-Crete®
- ProGUARD®
- Mortar beds
- Exterior-grade plywood for interior dry installations only
- Other substrates approved in writing by the manufacturer
The substrate must be structurally sound, clean, dry and free of materials that could interfere with proper bonding. Do not apply WaterArmor over wet surfaces or surfaces subject to hydrostatic pressure.
WaterArmor Application
Read and understand the current manufacturer data sheet before beginning installation. Follow applicable ANSI, TCNA and NTCA installation requirements as well as local building and plumbing requirements.
Ambient and substrate conditions must meet the manufacturer's temperature requirements. WaterArmor should not be applied when the surface temperature will fall below the required minimum during the specified curing period.
WaterArmor can be applied using a brush, roller or trowel. The material is supplied ready to use and should not be diluted with water or modified with unauthorized additives.
For trowel application, the manufacturer specifies a 3/16 inch V-notch trowel. Spread the material using the notched side and then flatten the material with the smooth side of the trowel to achieve the required film thickness.
Pre-Treat Corners, Edges and Transitions
Before applying the membrane over the main surface, pre-treat edges, corners, coves and floor-to-wall transitions. Apply a heavy coat of WaterArmor over a minimum area of approximately 4 inches on each side of the transition using a brush, roller or appropriate trowel.
For non-continuous corners, coves and in-plane substrate changes, embed 4-inch-wide fiberglass mesh tape into the fresh WaterArmor. Make sure the reinforcement is fully embedded and bonded without leaving voids or air pockets.
Cracks or substrate changes up to 1/8 inch should be filled and reinforced according to the manufacturer's instructions. When treating cracks in concrete floors, center the fiberglass mesh tape over the crack before embedding it into the wet membrane.
Applying the Main Waterproofing Membrane
After the required pre-treatment has been completed, apply a continuous WaterArmor membrane over the remaining surface. The target application is approximately 15 to 25 mils wet film thickness, with a minimum final dry film thickness of 20 mils.
Use a wet film thickness gauge when appropriate to help verify that enough material has been applied. Actual coverage will vary depending on the texture, porosity and roughness of the substrate.
Apply the membrane evenly and avoid pinholes, voids, thin spots or other discontinuities. Inspect the cured membrane before covering it with tile or stone and repair any deficiencies as necessary.
WaterArmor Drying and Recoat Time
WaterArmor is typically dry to the touch in approximately 1 hour at room temperature under standard conditions. Allow approximately 2 hours at 70°F and 50% relative humidity before applying a second coat or installing tile, according to the manufacturer's current data sheet.
Drying times can vary depending on temperature, humidity, substrate porosity, air movement and application thickness. Higher humidity and cooler conditions can extend the drying time.
The membrane changes from a darker gray color toward a lighter gray appearance as it dries. Do not install tile until the membrane has properly cured according to the manufacturer's requirements.
Installing Tile Over WaterArmor
Once WaterArmor has cured for the required period, tile or stone can be installed using an appropriate latex-polymer modified thin-set mortar meeting ANSI A118.4, as specified by the manufacturer.
Always follow the mortar manufacturer's instructions and applicable TCNA installation requirements. The waterproofing membrane should remain intact during tile installation. Avoid puncturing, cutting or damaging the cured membrane.
Flood Testing WaterArmor
If a flood test is required for the installation, allow the WaterArmor membrane to cure for at least 24 hours at 70°F and 50% relative humidity before testing.
Actual curing time can be longer or shorter depending on temperature, humidity, substrate conditions and other job-site factors. Follow applicable ASTM, plumbing code and local inspection requirements when performing a flood test.
Do not assume that a membrane is ready for flood testing simply because the surface feels dry. The required cure time and job-site conditions must be considered before testing.
WaterArmor Coverage
Estimated coverage is approximately 45 square feet per gallon when applied at a 25 mil wet and 20 mil dry film thickness.
- Approximately 45 square feet per gallon
- Approximately 225 square feet per 5-gallon pail
- Target wet film thickness: approximately 25 mils
- Minimum dry film thickness: 20 mils
Actual coverage varies according to substrate roughness, porosity, application method and the amount of material required to properly treat corners, transitions and reinforced areas.
WaterArmor Product Specifications
- Product type: Liquid-applied waterproofing and crack isolation membrane
- Base: 100% acrylic-based formulation
- Color: Gray
- Application: Brush, roller or trowel
- VOC: Less than 50 g/L
- Dry to touch: Approximately 1 hour at room temperature
- Recoat time: Approximately 2 hours at room temperature
- Typical drying time: Approximately 12 hours at room temperature
- Flood testing: As soon as 24 hours when required cure conditions are met
- Shelf life: 2 years in unopened original packaging when properly stored
- 5-gallon pail weight: Approximately 60 lbs
- Application range: Approximately 40°F to 110°F
- Estimated coverage: 45 square feet per gallon
- ANSI standard: ANSI A118.10
WaterArmor Packaging
WaterArmor is available in multiple container sizes for projects ranging from small bathroom repairs to larger commercial and residential waterproofing installations.
- 1 quart pail
- 1 gallon pail
- 5 gallon pail
The 5-gallon container provides approximately 225 square feet of estimated coverage at the specified 25 mil wet and 20 mil dry film thickness.
WaterArmor Bonding to Drain Assemblies
WaterArmor is designed to bond directly to clean metal, PVC and ABS drain assemblies. Proper surface preparation and compatibility are important when waterproofing around drains.
Follow the drain manufacturer's installation requirements and applicable plumbing codes. The waterproofing membrane should be properly integrated with the drain assembly without leaving gaps, pinholes or unsealed areas.
Antimicrobial Protection
WaterArmor contains antimicrobial protection designed to inhibit the growth of bacteria, mold and mildew on the surface of the dried membrane. The dried membrane also resists staining caused by mold.
Antimicrobial protection does not replace proper waterproofing design, drainage, ventilation, cleaning or maintenance. Wet areas should always be constructed with appropriate slope and drainage.
Low VOC Waterproofing Membrane
WaterArmor is a low-VOC liquid waterproofing membrane with a VOC level below 50 g/L. Its low-VOC formulation can be useful for projects where low-emission construction materials are preferred or required.
Cleaning Tools After Application
Clean brushes, rollers, trowels and other tools with soapy water before WaterArmor dries. The material becomes difficult to remove once it has cured.
Do not allow dried material to build up on application tools. Cleaning equipment promptly helps maintain proper application performance and extends the useful life of reusable tools.
Protecting the Cured Membrane
If tile or stone will not be installed immediately after the membrane has cured, protect WaterArmor from rain, severe weather and construction damage. Take care to prevent the membrane from becoming soiled, punctured or otherwise damaged.
If the cured membrane will remain exposed for more than 72 hours, protect it from extended direct sunlight and UV exposure according to the manufacturer's recommendations.
WaterArmor Limitations
WaterArmor is designed for specific waterproofing and crack isolation applications. It is important to understand what the product is and is not intended to do.
- Do not freeze the product.
- Do not apply over wet surfaces.
- Do not apply over surfaces subject to hydrostatic pressure.
- Do not use as a primary roofing membrane over occupied areas.
- Do not use as an adhesive.
- Do not use as a wearing surface.
- Do not use to bridge dynamic joints such as expansion, control or cold joints.
- Do not use to isolate cracks larger than 1/8 inch.
- Do not use to isolate cracks caused by excessive structural movement.
- Do not use over poured gypsum concrete.
- Do not use as a vapor barrier intended to eliminate subfloor moisture.
- Wet areas must be properly sloped to the drain.
- Maintain a minimum cured dry film thickness of 20 mils.
- Do not apply outside the manufacturer's recommended temperature conditions.
Storage and Shelf Life
Store WaterArmor in a cool, dry and well-ventilated location between approximately 50°F and 100°F. Protect the product from freezing, excessive heat and direct sunlight.
When stored in the original unopened packaging under the recommended conditions, WaterArmor has an approximately 2-year shelf life from the date of manufacture.
How to Reseal a Partially Used WaterArmor Pail
If a container is only partially used, place a sheet of plastic over the top of the remaining material before reinstalling the lid. Secure the lid tightly over the plastic. The plastic helps prevent the remaining material from bonding the lid to the container.
When reopening the container, remove the lid carefully. Remove and discard any cured material and plastic from the top of the container. Uncured material may be used if it remains suitable and meets the manufacturer's requirements.
Safety and Handling
WaterArmor may cause eye, skin and respiratory tract irritation and may be harmful if swallowed. Use the product with adequate ventilation and wear appropriate protective equipment to minimize contact with the eyes and skin.
- Do not get the material in your eyes, on your skin or on clothing.
- Use adequate ventilation during application.
- Wear appropriate eye and skin protection.
- Wash hands thoroughly after handling and before eating.
- Keep the product out of reach of children.
- Store the product in a cool, dry and well-ventilated area.
- Do not freeze.
For eye contact, immediately flush the eyes with large amounts of water for at least 15 minutes and seek medical attention or advice. For skin contact, flush the affected area with plenty of water. If irritation persists, seek medical attention.
If inhaled, move the affected person to fresh air. If symptoms develop or persist, seek medical attention. If swallowed, seek immediate medical attention or advice.
Always read the current manufacturer safety data sheet and product data sheet before using WaterArmor.
Installation Standards and Professional Guidance
Waterproofing is only one part of a successful tile installation. The substrate, framing, drainage, tile, mortar, grout, movement joints and other components must be appropriate for the intended application.
Follow the current WaterArmor manufacturer instructions along with applicable ANSI, TCNA and NTCA installation specifications and local building and plumbing requirements. When project conditions differ from the manufacturer's published recommendations, obtain written approval before proceeding.
WaterArmor for Residential and Commercial Tile Projects
WaterArmor provides a practical liquid-applied waterproofing solution for contractors, tile installers, remodelers and homeowners working on approved residential and commercial applications. Its ready-to-use formulation can be brushed, rolled or troweled, allowing it to conform to many common substrate shapes and transitions.
For bathroom and shower remodeling, WaterArmor can provide continuous waterproofing beneath tile while the crack isolation capability helps address certain minor cracks and substrate changes. For larger projects, the 5-gallon pail provides an estimated 225 square feet of coverage when applied at the specified thickness.
As with any waterproofing system, proper preparation and application are critical. Applying too little material, leaving untreated transitions, ignoring drainage requirements or damaging the cured membrane can compromise the performance of the installation.
WaterArmor Waterproofing Membrane: Key Takeaways
- Ready-to-use 100% acrylic liquid waterproofing membrane
- Designed for use beneath thin-set tile and stone
- Meets ANSI A118.10 requirements
- Can provide crack isolation up to 1/8 inch with fiberglass mesh reinforcement
- Suitable for approved residential and commercial applications
- Can be used on approved interior and exterior applications
- Brush, roller or trowel applied
- Approximately 45 square feet per gallon
- Approximately 225 square feet per 5-gallon pail
- Approximately 2 hours before recoat or tile installation under standard conditions
- Flood testing can begin after at least 24 hours when required cure conditions are met
- Low VOC formulation
- Antimicrobial protection on the dried membrane
Before Starting Your Waterproofing Project
Always verify that WaterArmor is appropriate for your specific project, substrate and tile installation. Read the current manufacturer product data sheet and safety data sheet before application. Confirm required film thickness, drying time, reinforcement details, drainage and flood-testing requirements before covering the membrane with tile or stone.
A properly prepared substrate and correctly installed waterproofing membrane are essential to protecting a tile installation from water-related problems. If you are unsure whether your substrate or project condition is approved, consult the manufacturer or a qualified tile and waterproofing professional before proceeding.
Related Resources
- WaterArmor Waterproofing MSDS
- Preformed Shower Pan MSDS Safety Sheet
- Preformed Ready-to-Tile Shower Pan Guide
Shop Related Products
- WaterArmor (SealGuard) Liquid Waterproofing Membranes
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Important Product Information
The information on this page is provided as a practical reference based on the manufacturer's published product information. Always use the most current WaterArmor product data sheet, safety data sheet and installation instructions for the specific project. Manufacturer instructions, applicable building codes and professional installation standards take precedence over information summarized on this page.