10 Best Brick Water Sealer 2025 in the United States

The Armor SX5000 WB is a high-quality, water-based sealer designed for protecting a range of surfaces such as concrete, brick, and natural stone. One of its standout features is its ability to significantly reduce water absorption by up to 95%, which helps prevent damage from cracks and stains over time. The professional-grade Silane-Siloxane formula is particularly beneficial for both interior and exterior applications, providing a durable barrier that lasts between 7 to 10 years. Furthermore, it maintains the original look and feel of the surfaces it protects, which is a major plus for homeowners looking to preserve their aesthetics.

Ease of application is another strength; it's ready to use, allowing for straightforward application with a pump sprayer, and clean-up is hassle-free thanks to its water-based formula with zero VOCs and no odor. This makes it suitable for DIY enthusiasts who may not have a lot of experience with sealers.

There are a few considerations to keep in mind. While it provides solid protection, the initial preparation of the surfaces is crucial for the best results, requiring proper cleaning to ensure effectiveness. Additionally, while the 5-gallon size is great for larger projects, it may be more than what some users need, which could lead to waste if they only have a small area to treat.

The MasonryDefender Chimney Brick Sealer is a water-based siloxane sealer designed for exterior vertical masonry surfaces, including chimneys, brick walls, stone, and stucco. One of its standout features is its breathability, which allows moisture to escape, preventing freeze/thaw damage, a significant benefit for long-term durability. The sealer forms a permanent bond with the masonry, offering durable protection against water intrusion, which is particularly crucial for preventing leaks that can cause damage to your home.

Additionally, the sealer does not alter the surface color, maintaining the aesthetic appeal of your masonry surfaces. The application process is straightforward, requiring two coats applied with a pump-up sprayer, and the water-based formula makes cleanup easy. However, you should be cautious about overspray and use drop cloths to protect surrounding areas.

The coverage is relatively standard, with one gallon covering 80-150 square feet in two coats, and it dries to the touch in 2-6 hours, becoming waterproof within 4-6 hours. While it continues to strengthen over several weeks, some users may find the initial drying time slightly longer than preferred. This sealer is best suited for homeowners looking for a reliable, easy-to-apply solution to protect their chimneys and other vertical masonry surfaces from water damage without altering their appearance.

The KILZ Basement and Masonry Waterproofing Paint is a versatile option suited for both interior and exterior applications on porous surfaces like concrete, masonry, stucco, and brick. As a water-based sealer, its formulation aims to create a waterproof barrier, enhanced by alkali resistance for long-lasting durability. This paint is beneficial for preventing water infiltration and is mildew-resistant, which adds another layer of protection to your surfaces.

It's not suitable for floors or walls with active water leaks. The required preparation includes priming and filling cracks, which might be a bit involved but ensures better results. Application is suggested using various tools like rollers, brushes, or airless sprayers and the paint dries to the touch in about an hour, with a full recoat possible in four hours. A matte finish provides a subtle look rather than a shiny surface.

The coverage area varies between 75 to 125 square feet per gallon, depending on the porosity of the surface. This product is best for homeowners aiming to protect and seal basement or masonry surfaces with a durable, water-resistant coat that also resists mildew.