Imagine your home’s exterior. Those sturdy concrete blocks might look tough, but they’re actually pretty thirsty! Over time, rain, sun, and even everyday dirt can soak into them, leading to cracks, stains, and a dull, worn-out look. But what if there was a simple way to protect that investment and keep your home looking its best for years to come?
Choosing the right sealer for your exterior concrete blocks can feel like a guessing game. You want something that works, but with so many products out there, how do you know which one is best? You might worry about it not lasting, or even making your blocks look weird. This can be frustrating, and you just want to protect your home without the headache.
Don’t worry! This guide is here to help. We’ll break down what makes a good exterior concrete block sealer and show you how to pick the perfect one for your needs. By the end, you’ll feel confident in your choice and ready to give your home’s exterior the protection it deserves, saving you time and money down the road.
Top Exterior Concrete Block Sealer Recommendations
- PENETRATING WATER REPELLENT PROTECTION: This penetrating concrete sealer absorbs into porous surfaces to help reduce water and moisture absorption. Ideal as a concrete sealer outdoor for driveways, patios, sidewalks and other exposed masonry surfaces.
- CLEAR NATURAL-LOOK FINISH: Protect outdoor surfaces while helping preserve their original appearance. The clear formula works as a driveway sealer, paver sealer and brick sealer without creating the heavy glossy look associated with decorative wet-look coatings.
- FOR CONCRETE, BRICK, PAVERS & STONE: One versatile masonry sealer for multiple porous exterior surfaces. Use on concrete driveways, brick, patio pavers, walkways, stone surfaces, pool decks and other suitable outdoor masonry around the home.
- BUILT FOR OUTDOOR WEATHER EXPOSURE: Designed to help limit moisture intrusion caused by rain, snow and changing outdoor conditions. This concrete water repellent supports long-term maintenance of driveways, pavers, brick and stone exposed to seasonal weather.
- EASY DIY APPLICATION: Apply the liquid concrete sealer to a clean, dry and properly prepared surface using a sprayer, roller or brush. The 1 gallon size is convenient for residential driveway, patio, walkway, masonry and stone sealing projects.
- Item Weight: 9.25 lb
- Country of Origin: China
- Color: White
- Brand name: Ames
- EASY & QUICK APPLICATION:-Designed for effortless use, this sealer applies smoothly with basic DIY tools—no professional skills required. It dries quickly to form a reliable barrier, letting you complete your project faster and enjoy protected surfaces within hours.
- DEEP PENETRATION & WATER REPELLENCY:- Advanced silane/siloxane formula penetrates deep into concrete pores to block water absorption. Creates visible water-beading while preventing moisture, cracks, and surface damage for years of durable protection.
- LONG-LASTING DURABILITY:- Built to withstand traffic, cleaning, and extreme weather, this sealer keeps concrete looking newer for longer. Ideal for patios, driveways, and walkways—resists stains, salt, and wear without peeling or yellowing over time.
- NATURAL & CLEAR FINISH:- Enjoy strong protection without altering your concrete’s appearance. The invisible finish preserves natural colour and texture—no unwanted gloss or “wet look,” just clean, clear, and consistent results across surfaces.
- SAFE & LOW-ODOR FORMULA:- Eco-friendly and water-based, this concrete sealer offers minimal odor and is safe for plants, pets, and indoor use. Perfect for families and sensitive environments where safety and comfort matter most.
- EXTREME WEATHER PROTECTION: Maintain your stone, concrete, exterior wood, brick, and more from water damage. Our wood and masonry sealant safeguards and creates a strong and effective shield against extreme weather conditions. Utilizing professional grade waterborne silicone technology, our sealant offers long-lasting protection against moisture to maintain a natural appearance.
- LONG LASTING: Drying completely invisible, our wood sealant encourages a natural appearance and beauty for years to come. The granite sealant prevents water seepage, and water beads up while waterproofing.
- MADE IN THE USA: Our solution is made in the USA and penetrates deep to develop a long-term protective shield against even the harshest of meteorological conditions. Our high quality, state-of-the-art sealant gets the job done right the first time.
- MULTI-SURFACE SEALANT: Formulated to protect stone, concrete, wood, brick, block, stucco, and much more, conveniently and effectively seal and protect a large plethora of surfaces with our floor sealer. This sealant is VOC Compliant.
- EASY TO APPLY: Mix ProCare's Wooden Floor Sealer before use. Apply our hardwood sealer using a pump or airless sprayer, paint pad, brush, or roller. Our floor finish and sealer should be applied evenly until the surface is completely saturated while avoiding puddling
- WATER RESISTANCE: Our Zero-VOC formulated penetrating concrete sealer outdoor waterproof forms a protective barrier on the concrete surface, preventing water and moisture from penetrating. Cement sealers are especially important in areas exposed to rain, snow or high humidity. By resisting water absorption, paver sealer help prevent issues such as cracking, spalling, and freeze-thaw damage.
- INVISIBLE SURFACE PROTECTION: Ready to use concrete sealer outdoor a shield against stains caused by oil, grease, chemicals, and other substances. This is especially beneficial in areas like driveways, garages, and commercial spaces where spills are common. The concrete driveway sealer helps maintain a longer-lasting, well-maintained appearance.
- INCREASED LIFESPAN: Provides waterproofing and long-lasting protection for your concrete, concrete sealers contribute to the longevity of concrete surfaces. Penetrating water-based silane siloxane stone sealer waterproofer reduces the potential for damage, extending the life of driveways, sidewalks, patios.
- REDUCED MAINTENANCE: Sealed concrete surfaces are easier to clean and maintain. The protective barrier created by the concrete driveway sealer makes it more difficult for dirt, dust, and contaminants to adhere to the surface. Regular cleaning becomes more effective, and the overall maintenance requirements are reduced, saving time and effort.
- PROFESSIONAL SEAL PROTECTION: OAIEGSD concrete countertop sealer 150 - 350 square feet per gallon, providing up to 10 years of protection for your garage floor, driveway, driveways, stamped concrete, walls, patios and countertops. Our concrete waterproofing agent can be used as a grout sealer.
- CREATES PROFESSIONAL WET LOOK FINISH ON OUTDOOR STONE SURFACES - Works on granite, slate, pavers, concrete, brick, cobblestone, flagstone, and rough-cut stone. Perfect for driveways, walkways, patios, pool decks, and outdoor living spaces. Creates a rich satin sheen that makes surfaces look freshly sealed and professionally maintained year-round.
- IDEAL FOR LARGE OUTDOOR PROJECTS ON ROUGH STONE AND BRICK - Perfect 1 gallon size for textured pavers, rough-cut stone, brick patios, cobblestone driveways, and flagstone paths. Covers 200-300 square feet depending on porosity. Great for complete driveway sealing and large patio projects.
- WEATHER-PROOF PROTECTION LASTS 3-5 YEARS - Heavy-duty formula withstands torrential rain, snow, UV exposure, and daily foot traffic without peeling, flaking, or cracking. Repels water, oil stains, and salt damage while resisting freeze-thaw cycles and temperature extremes from -20°F to 140°F. Apply once and enjoy years of maintenance-free protection.
- PREMIUM NON-YELLOWING FORMULA STAYS CRYSTAL CLEAR FOR YEARS - Unlike cheaper sealers that turn yellow, cloudy, or milky after 6-12 months, our advanced formula maintains its transparent wet-look finish indefinitely. Breathable design prevents moisture buildup while enhancing natural stone beauty. Safe for outdoor use once dry. No harsh fumes, no color alteration.
- 1 GALLON COVERS 200-400 SQUARE FEET - Easy outdoor application with brush, roller, or pump sprayer. Best suited for exterior rough and textured stone. Dries to touch in 1-2 hours, light foot traffic after 24 hours, full cure in 72 hours. Apply in well-ventilated outdoor areas.
- Penetrating Concrete Protection: ABOSEAL penetrates and seals exterior concrete to help protect against water, deicing salts, spalling and everyday wear, extending the life and appearance of the surface
- Protective Barrier for High-Traffic Areas: Creates a protective barrier on walkways and sidewalks that helps resist moisture, dirt, and grime, making high-traffic paths easier to clean and maintain
- Stain and Erosion Resistance: Seals concrete and many masonry to help minimize staining, surface erosion, and color fade, while preserving a natural look
- Weather-Resistant Durability: Designed to withstand sun, rain, snow, and freeze-thaw cycles, helping reduce spalling, micro-cracking, and other damage caused by water penetration and harsh climates
- Easy Application Process: User-friendly formula can be applied with common tools, allowing both pros and DIYers to protect driveways, walkways, and patios with minimal hassle when following label directions
- Enhance and protect your favorite space: Our sealers are perfect for pool decks, driveways, walkways, concrete floors, block walls, patios, masonry, architectural toppings, restoration projects, and more! Enhances stain color and vibrancy, high UV stability, and water repellant within 24 hours.
- For the DIYer: Easy application, fast drying, and low maintenance. Simply clean with soap and water. Technical support available for any questions and application best practices.
- Versatile and economical: Can be used on: cement toppings, waterborne colorants, concrete, brick, masonry, pavers, Spanish tile, stucco, and some natural stones. 1 gallon Coverage: 300 sq. ft. to 500 sq. ft. depending on application method and surface conditions.. Can be used indoors or outdoors and in a variety of climates.
- Step 4 of our comprehensive system: After stripping/cleaning the surface and staining, apply our sealers to enhance the vibrancy of your stain and add long-term durability which will not yellow over time. May be slippery when wet, consider Classic Gator Grip additive for areas prone to moisture collection.
- Environmentally conscious and locally based: Water-based, zero VOC (complaint in all 50 states), no fumes, and low odors. Proudly formulated and manufactured completely in the USA!
Protect Your Project: The Ultimate Exterior Concrete Block Sealer Buying Guide
Want to keep your concrete block walls looking great and lasting longer? An exterior concrete block sealer is your best friend. It shields your blocks from rain, stains, and the harsh sun. This guide will help you pick the right one for your needs.
Why Seal Your Concrete Blocks?
Concrete blocks might seem tough, but they can soak up water and stains. Sealing them creates a protective barrier. This barrier stops water from seeping in, which can cause cracks when it freezes and thaws. It also makes cleaning up spills much easier. Your walls will look newer for longer, and you’ll save money on repairs down the road.
Key Features to Look For
When you shop for a sealer, keep these important features in mind:
1. Water Repellency
This is the most important job of a sealer. Look for products that clearly state they are “water repellent” or “waterproof.” This means they actively push water away from the surface.
2. Stain Resistance
Concrete blocks can get dirty from dirt, oil, or mildew. A good sealer will make it harder for these things to stick. This keeps your walls looking clean with less scrubbing.
3. Breathability
This might sound strange, but some sealers let moisture escape from inside the block. This is important because trapped moisture can cause damage. Look for “breathable” or “vapor permeable” on the label.
4. UV Protection
The sun’s rays can fade and degrade concrete. Some sealers have UV blockers that help protect the color and integrity of your blocks.
5. Durability and Longevity
How long will the sealer last? Some sealers need reapplication every year or two. Others can last for five years or more. Check the product description for expected lifespan.
6. Finish Type
Do you want your blocks to look natural, or do you prefer a glossy sheen? Sealers come in matte, satin, and gloss finishes. Choose one that matches your desired look.
Important Materials and What They Mean
The ingredients in a sealer are key to how well it works.
- Acrylics: These are common and work well for general protection. They offer good water and stain resistance.
- Silicones/Siloxanes: These are excellent for deep penetration and offer superior water repellency. They are often more breathable.
- Polyurethanes: These create a tough, durable film that offers great abrasion and chemical resistance. They can sometimes make the surface slippery.
Factors That Improve or Reduce Quality
A sealer’s quality depends on a few things.
- Better Quality:
- High concentration of active ingredients: More of the good stuff means better protection.
- Penetrating formulas: These soak into the block for longer-lasting defense.
- Reputable brands: Established companies often use better research and development.
- Lower Quality:
- Water-based formulas with low solids: These might not offer as much protection or last as long.
- Surface-only sealers: These can wear off quickly with foot traffic or weather.
- Unlabeled or generic brands: You might not know what you’re getting.
User Experience and Use Cases
Most sealers are pretty easy to use. You usually apply them with a brush, roller, or sprayer. Always follow the product’s instructions carefully.
- DIYers: Many sealers are designed for homeowners to use themselves.
- Homeowners: Protect your foundation walls, garden walls, patios, and walkways made of concrete blocks.
- Landscapers: Keep decorative block walls and planters looking their best.
- Contractors: Ensure long-term protection for new construction projects.
Frequently Asked Questions (FAQ)
Q: What are the main Key Features to look for in an exterior concrete block sealer?
A: The main Key Features are excellent water repellency, strong stain resistance, breathability to allow moisture to escape, UV protection from the sun, and long-lasting durability.
Q: What are the important materials used in concrete block sealers?
A: Important materials include acrylics, silicones/siloxanes, and polyurethanes. Each offers different levels of protection and performance.
Q: How can I tell if a sealer is good quality?
A: Good quality sealers usually have a high concentration of active ingredients, are designed to penetrate the block, and come from trusted brands.
Q: What factors can make a sealer perform poorly?
A: Poor quality can result from low concentrations of active ingredients, formulas that only seal the surface, or products from unknown brands.
Q: How do I apply an exterior concrete block sealer?
A: You typically apply sealers with a brush, roller, or sprayer. Always read and follow the specific product instructions for best results.
Q: Can I use any sealer on any type of concrete block?
A: It’s best to check the product label to ensure it’s suitable for your specific type of concrete block and its intended use.
Q: How often do I need to reapply concrete block sealer?
A: This varies by product. Some need reapplication every 1-2 years, while others can last 5 years or more. Check the product’s expected lifespan.
Q: Will a sealer change the look of my concrete blocks?
A: Yes, sealers can affect the look. They come in different finishes like matte, satin, or gloss. Some may darken the block slightly.
Q: Can I seal concrete blocks that are already stained?
A: It’s always best to clean the blocks thoroughly before sealing. Some sealers might help repel future stains, but they won’t typically remove existing ones.
Q: Is it important for the sealer to be breathable?
A: Yes, breathability is important. It allows any moisture trapped inside the block to escape, preventing damage like cracking or spalling.