When selecting a concrete and masonry waterproofer, the main goal is to prevent water intrusion while allowing surfaces to breathe. The best options below are suited for both interior and exterior applications on concrete, brick, stucco, and masonry surfaces. They range from ready-to-spray silicone chemistries to breathable acrylics and latex-based sealers. This guide highlights five top products and explains who they’re best for, plus practical cautions. A quick buyer’s table follows to help you compare at a glance.
| Product | Best For |
|---|---|
| Eco Advance Concrete/Masonry Siloxane | Outdoor concrete, brick, and stone; spray applications; plant-friendly |
| INSL-X WaterBlock Acrylic Masonry | Basement walls and exterior masonry; fast-drying, high alkali resistance |
| Drylok Extreme Concrete & Masonry | High-hydrostatic-pressure areas; above and below grade |
| Concrete Crack Filler Sealant | Cracks, seams, and gaps; surface sealing after repair |
| Drylok Latex Base Masonry Waterproofer | Easy-to-apply latex sealer; bright white finish |
Buyer note: The best choice depends on your surface type, exposure (basement vs. exterior), application method, and whether you need a breathable layer or a thick waterproof coat. The products below provide a mix of breathable films, elastomeric options, and concrete repair compatibility. Use this guide to align your project with the right chemistry and finish.
Eco Advance Siloxane Waterproofer – Ready To Use
This ready-to-use siloxane formula is designed for spray application using a standard garden pump sprayer. It forms a breathable barrier that protects concrete, brick, stucco, stone (natural and synthetic), EIFS, and pavers. It helps resist water damage, oil, stains, and de-icing salts, while remaining safe for use around plants, pets, and people. Best for outdoor surfaces with spray-application needs and where a low-odor option is preferred. Be mindful of even coverage across irregular textures to avoid missed spots.
- Best for: Outdoor concrete and masonry surfaces where spraying is convenient and odor must be minimized.
- Why selected: Ready-to-use, broad surface compatibility, and plant/pet safety features expand usability around homes and landscaping.
- Caution: Not ideal for heavily textured or highly porous areas without thorough coverage; recoat as needed for porous substrates.
INSL-X WaterBlock Acrylic Masonry Paint
An acrylic masonry waterproofer paint designed for vertical interior and exterior concrete walls. It’s suitable for basement walls, foundations, retaining walls, cinder blocks, stucco, brick, and masonry. The coating dries quickly and offers resistance to high alkalinity (up to pH 13). Best for projects requiring a paintable surface with waterproofing, especially on interior basement walls or exterior masonry that benefits from a finished appearance.
- Best for: Surfaces where a paintable waterproof coating is desired, especially vertical walls in basements or foundations.
- Why selected: Fast-drying with strong alkali resistance; provides a finished white coating that can be tinted.
- Caution: Not all exterior surfaces require paintable coverings; color options may require tinting.
Drylok Extreme Concrete & Masonry Waterproofer
This product penetrates deeply to create an impenetrable barrier against water infiltration and is engineered for extreme hydrostatic pressure. It’s suitable for both above- and below-grade applications, including basement and retaining walls. The bright white finish can be tinted if desired. Best for structural surfaces facing significant water exposure or areas with high moisture risk. Note that color-tinting may affect appearance; verify compatibility with your surface color goals.
- Best for: Surfaces facing high water pressure and potential hydrostatic challenges.
- Why selected: Deep penetration and high-pressure resistance offer robust protection for foundations and below-grade areas.
- Caution: White finish may be preferred for brightness, but consider tinting if color consistency is important.
Concrete Crack Filler Sealant – Waterproof Repair
This 1-piece repair compound focuses on filling cracks, seams, small gaps, and worn spots on concrete floors, slabs, patios, sidewalks, and driveways. After filling, it provides a protective seal over repaired areas to support routine maintenance on exposed concrete surfaces. Best for projects where existing cracks are a concern and you need a smooth, sealed finish before applying a broader waterproofer. Avoid applying to actively moving joints without ensuring proper expansion accommodation.
- Best for: Crack repair prior to sealing; provides a smooth base for subsequent waterproofing.
- Why selected: Addresses common concrete imperfections that can harbor water penetration.
- Caution: Not a full waterproofing solution by itself; use with an appropriate topcoat if needed.
Drylok Latex Base Masonry Waterproofer
This latex-based waterproofer offers an easy-to-apply solution with simple cleanup and relatively low odor. It creates a durable waterproof barrier once properly applied and dries to a white finish that can brighten dark or dull surfaces; tinting is possible with universal colorants. Best for DIY projects where user-friendly application and fast cleanup are priorities. Consider surface brightness and tinting needs when planning color outcomes.
- Best for: DIY applications where ease of use and low odor are important.
- Why selected: Latex-based formula simplifies application and cleanup while delivering reliable waterproofing.
- Caution: White finish may require tinting to match decor; ensure proper surface preparation for best adhesion.
Buying Guide
Key considerations help you choose the right concrete and masonry waterproofer for your project. First, determine surface type: concrete, brick, stucco, or EIFS may respond differently to silicone, acrylic, or latex formulas. Second, assess exposure: basements and below-grade areas demand stronger hydrostatic resistance, while exterior walls may benefit from breathable, water-repellent finishes. Third, decide on application method: sprayable products can save time on large areas, while paints and sealants provide a finished look. Fourth, consider cure time and odor: faster-drying formulas with low odor suit indoor renovations. Finally, plan for color and finish: white finishes can brighten surfaces or be tinted; transparent siloxanes preserve original color.
- Application method: Choose spray-on for quick coverage or brush/roller for precise, detailed work.
- Breathability vs. seal: Siloxane and breathable acrylics allow moisture movement; non-breathable coatings form a stronger moisture barrier.
- Surface preparation: Clean, repair cracks, and remove loose material before coating for best adhesion and longevity.
FAQ
- What is the difference between breathable sealers and non-breathable coatings? Breathable sealers let moisture escape, reducing long-term damage from trapped moisture; non-breathable coatings form a tighter barrier that can trap moisture if not properly applied.
- Can these products be used indoors? Yes, but check odor and ventilation requirements. Low-odor options are available.
- Which product is best for basements? Acrylic WaterBlock and Drylok Extreme offer strong performance on basement walls and foundations.
- Do I need to repair cracks before applying waterproofing? Yes, repairing cracks improves seal integrity and prevents leaks from widening after sealing.
- Can I tint the white finishes to match decor? Some products allow tinting; verify compatibility with universal colorants.
- How long does curing take? Curing times vary by product and environment; follow manufacturer directions for best results.