Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.11 Best Brick Sealant | Water is brick’s worst enemy—seal it out.

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This water-based silane/siloxane concentrate represents a standout entry-level option that punches above its weight. It’s designed to be diluted into a full gallon, offering a budget-friendly path to professional-grade penetrating protection. The formula creates an invisible hydrophobic barrier within the brick and mortar, effectively repelling water and salts while allowing the masonry to breathe.

Application is straightforward with a pump sprayer, and it dries to a natural, non-gloss finish in about an hour under ideal conditions. Users report it leaves brick with a slightly enhanced, “wet” look that brightens the appearance without being shiny. Its VOC-free and odor-free nature makes it safe for indoor use around pets and plants, which is a significant advantage for sunrooms or basement walls.

Coverage is estimated at up to 150 square feet per mixed gallon, though porous surfaces will require more. The promise of up to five years of protection is solid for a product in this category, making it an excellent choice for homeowners seeking reliable, breathable waterproofing without a premium investment. It’s a versatile workhorse for brick walls, walkways, and garden features.

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Limino’s transparent waterproof coating is a versatile, water-based acrylic sealer that excels at creating a clear, protective membrane over a variety of surfaces, including brick. It’s formulated to seal cracks and seams, blocking air and moisture penetration. The key appeal is its crystal-clear finish that preserves the original appearance of the substrate without yellowing.

This product is praised for its ease of use; it can be applied with a brush, roller, or even poured, and it dries remarkably fast. It’s non-toxic and free from strong odors, making it suitable for interior applications like basement walls or bathroom exteriors. The formulation is designed to withstand temperature extremes, offering reliable performance in both summer heat and winter cold.

With a coverage of approximately 80 square feet per 35-ounce container, it’s a solid choice for smaller projects or targeted repairs. It works well on concrete, wood, metal, and ceramic in addition to masonry, providing broad utility around the home. For those needing a general-purpose, clear waterproofer for mixed materials, it delivers dependable results.

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SCNK offers a high-viscosity, acrylic-based waterproofing agent that cures into a flexible, rubber-like membrane. This product is engineered for serious leak repair, forming a dense barrier that insulates against water, air, and moisture. It’s particularly effective for sealing active leaks in roofs, around chimneys, and in gutters, in addition to general brick waterproofing.

The thick consistency allows it to bridge small hairline cracks and adhere tenaciously to surfaces. When cured, it remains transparent and does not alter the surface texture or color. Application is simple via brush, roller, or trowel, and it smoothly penetrates into gaps. Its performance in variable weather conditions is a strong point, with resistance to both UV degradation and freezing temperatures.

Coverage is roughly 14 square feet per kilogram, and multiple layers are recommended for a permanent bond. It’s a favorite for DIYers tackling specific, persistent leaks on various substrates. However, it’s crucial to apply it in the correct temperature range (above 50°F) for proper curing and to avoid the milky haze some users report from improper application.

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Specifically formulated for vertical masonry surfaces like chimneys, this siloxane-based sealer is a professional favorite. Its advanced formula penetrates up to a quarter-inch into the substrate, creating strong chemical bonds within the brick and mortar structure itself. This deep integration provides lasting protection that becomes part of the masonry, rather than just sitting on top.

The critical feature is its breathability. Unlike film-forming sealers, it allows water vapor to escape, which is essential for preventing spalling and freeze-thaw damage in chimneys that experience high heat and moisture cycles. It dries completely clear without altering the brick’s appearance, maintaining a natural look. Application is best done with a pump sprayer, working from the bottom up.

Coverage is approximately 40 square feet per gallon, which is typical for a high-quality penetrating sealer on porous brick. It’s a targeted solution that excels at its primary job: stopping water intrusion into chimneys and other vertical stone or brick structures. For homeowners battling fireplace leaks or damp chimney stacks, it’s a purpose-built answer.

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This clear, water-based siloxane sealer is another top contender for vertical masonry protection, offering a balance of professional performance and user-friendly application. It’s designed to repel water effectively while allowing the substrate to breathe, crucial for the long-term health of brick chimneys, walls, and foundations. The formula is engineered to resist cracking, spalling, and staining caused by water intrusion.

Users find it exceptionally easy to apply with a standard garden sprayer and appreciate that cleanup requires only soap and water. It leaves no glossy film, maintaining the original matte appearance of the brick. Testimonials from homeowners with chronic chimney leaks are particularly strong, with many reporting it solved long-standing water ingress problems that other methods failed to address.

The product represents a mid-range option that delivers reliable, breathable protection. It’s a go-to for DIYers who want a step up from entry-level sealers without venturing into premium professional-grade territory. Its effectiveness on both brick and grout makes it a comprehensive solution for entire masonry surfaces.

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This is a versatile, deep-penetrating silane-siloxane sealer designed for a broad spectrum of outdoor masonry surfaces, from concrete driveways to brick patios and natural stone walkways. It creates a clear, waterproof barrier within the substrate, protecting from within without forming a surface film. This approach preserves the natural look and texture while offering robust defense against moisture, freeze-thaw cycles, and stains.

Coverage is generous, ranging from 90 to 150 square feet per gallon depending on porosity. Application is simple with a pump sprayer, allowing for even coverage and deep penetration. It’s a favorite for sealing outdoor pavers, terra cotta pots, and garden statues, where it prevents water absorption that leads to cracking in freezing weather. The breathable formula ensures moisture vapor can escape.

It strikes an excellent balance between performance, ease of use, and value for larger outdoor projects. Users report immediate water beading after application, a visible sign of its repellent properties. For homeowners looking for one reliable sealer to protect various masonry elements around their property, this all-purpose formula is a compelling and effective choice.

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Stormdry stands out in the market with its independently certified 25-year waterproofing protection, backed by a British Board of Agrément (BBA) certificate. This isn’t a liquid but a thick, cream-based silicone formula. The cream consistency is a significant advantage: it clings to vertical surfaces without dripping, allowing for deep penetration and a single-coat application that saves time and product.

The technology is designed to penetrate deeply and react within the masonry, forming a long-lasting, breathable, water-repellent barrier. It’s colorless and maintains the natural appearance of the wall. Its effectiveness in treating penetrating damp is verified, and it’s even recognized as an energy-saving method by the Energy Savings Trust, as dry walls have better insulation properties.

This is a premium solution for those who want the highest grade of long-term, certified protection and are willing to invest accordingly. It’s particularly suited for problem walls with chronic damp issues. The non-drip formula makes application with a brush clean and efficient, minimizing waste.

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PROSOCO is a trusted name among masonry professionals, and their Sure Klean Weather Seal Siloxane PD is a testament to that reputation. This is a high-performance, water-based brick sealer designed for maximum durability, with an estimated service life of more than 10 years. It penetrates deeply into brick, concrete, stucco, and manufactured stone, providing robust protection against water intrusion.

The formula is breathable, preventing the trapping of moisture that leads to spalling and efflorescence. It dries to a completely flat, natural matte finish that doesn’t impart a “wet look” or sheen, which is often desired for historical restorations or modern aesthetics where the original appearance must be preserved. Application is straightforward with a standard garden sprayer.

This product is for the homeowner or contractor who doesn’t want to compromise on quality and seeks professional-grade, long-lasting results. It’s the type of product used on commercial buildings and high-end residential projects, offering peace of mind through proven performance and brand credibility.

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For those desiring enhanced color and a permanent “matte wet look” without surface gloss, the Armor WL550 is a top-tier solvent-based solution. This professional-grade sealer works entirely below the surface, chemically reacting within the substrate to form a water-repellent barrier that can reduce liquid absorption by up to 95%. It darkens and enriches the natural colors of brick, stone, and concrete.

The result is a beautiful, deepened hue that appears wet, yet the surface feels exactly the same—no sticky or slippery film. It offers long-lasting protection for up to 5-7 years, guarding against cracking, spalling, salt damage, and organic growth. It’s particularly stunning on natural flagstone, bluestone, and slate, making colors pop and removing the dusty, dry appearance.

Application requires a pump sprayer, and coverage is excellent, up to 225 square feet per gallon. Be mindful that it is solvent-based, so it has stronger fumes and requires proper ventilation during application. This is the choice for homeowners who view their masonry as a design feature and want to protect it while maximizing its visual appeal.

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This is an industrial-grade, ready-to-use silane/siloxane water repellent sold in a substantial 5-gallon container, making it ideal for sealing large driveways, extensive patios, or entire building exteriors. It features Rainguard’s “Micro-Lok” technology, designed to form a clear, hydrophobic barrier that provides robust protection against water, stains, and weather for up to five years.

Coverage is highly variable (40-400 sq. ft./gallon) based on porosity, which is typical for professional products. It’s breathable, VOC-free, and safe for use around landscaping. The product is praised by professionals in masonry for its effectiveness on concrete, with users reporting exceptional water beading that lasts for years. It’s a favorite for sealing porous aggregate driveways and large garage floors.

Purchasing in this bulk size offers better value per gallon for big jobs. It’s a serious product for serious projects, offering the peace of mind that comes with a commercial-grade formulation. Application is via pump sprayer, and its consistency is easy to work with for covering large areas efficiently.

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Wadities offers a bulk 5-gallon option of a water-based, rubberized acrylic waterproof coating. This product is engineered to create a flexible, adhesive membrane that seals leaks on roofs, walls, and foundations. It’s UV-stabilized to resist summer sun and remains flexible in cold weather to prevent cracking and peeling, making it a durable choice for exterior surfaces.

The sealant is applied by roller or brush and dries to a transparent, slightly shiny finish. It’s designed to penetrate joints and cracks, forming a strong seal that is both immediate and long-lasting. Users have successfully employed it to stop leaks around windows, on roofs, and in bathrooms, noting its good adhesion and forgiving application on vertical surfaces.

With a coverage of about 280 square feet per 5-gallon pail (with 2-3 coats), it’s a practical bulk solution for waterproofing large flat or sloped roofs, big wall sections, or commercial-sized patios. It’s a surface coating, not a penetrating sealer, so it’s ideal for creating a continuous waterproof membrane over a substrate.