Note: This DIY article is provided as a general guide only and is not intended to take the place of product-specific installation procedures; always follow applicable manufacturers’ instructions. Depending on your home’s age and condition, location within the home, and other potential factors, repairs and/or upgrades or other services may be necessary prior to the beginning and/or completion of your project that may involve the services of a home improvement professional. This article does not include advice pertaining to local building codes and/or any related inspections.

Unsealed concrete surfaces are vulnerable to water absorption, cracks, and erosion, leading to costly repairs over time. Exposure to rain, freeze-thaw cycles, and heavy traffic can cause deterioration, especially in driveways, patios, and walkways. Using a durable silicone sealant helps protect concrete by creating a waterproof, flexible barrier to withstand both expansion and contraction. This guide explains the key concrete areas to seal and provides step-by-step instructions for long-term concrete protection.

Why you should seal your concrete surfaces

Sealing concrete is critical for preventing water absorption, reducing cracks, and extending surface durability. Concrete is naturally porous, allowing water, oil, and chemicals to seep in, which can lead to staining, erosion, and freeze-thaw damage. When moisture penetrates concrete and freezes, it expands, causing surface cracks and structural weakening over time.

Proper sealing also protects against surface wear and weathering, especially in high-traffic areas like driveways, patios, and walkways. A flexible, waterproof sealant helps prevent surface deterioration from UV exposure, rain, and extreme temperatures, keeping concrete surfaces intact and functional.

Expansion joints are another critical area where sealing is essential. As concrete naturally expands and contracts due to temperature changes, unsealed joints can develop stress fractures and gaps. A high-quality silicone sealant ensures long-lasting flexibility, allowing concrete surfaces to shift without cracking or breaking apart. Sealing concrete with a durable, weather-resistant product preserves its strength, appearance, and longevity.

Sealing concrete surfaces with 100% silicone sealant helps prevent water absorption, cracks, and erosion, extending the life of driveways, patios, and walkways. GE Concrete Silicone 2® Sealant provides a permanent waterproof and weatherproof bond, making it ideal for crack repair and surface protection. For expansion joints, GE Supreme Silicone Window & Door Sealant offers superior flexibility, allowing concrete to expand and contract without compromising the seal.

What concrete areas should you seal around your home?

Sealing driveways, patios, and walkways help protect concrete from moisture damage, cracks, and surface wear. Each area experiences different environmental stresses, making proper sealing essential for long-term durability.

• Driveways: Constant exposure to vehicle traffic, rain, and freeze-thaw cycles can cause concrete to crack and erode. Sealing driveways helps prevent water penetration, reduce surface damage, and protect against oil and chemical stains.
• Patios and walkways: These surfaces are prone to shifting, cracking, and weather damage, especially in areas with extreme temperatures. A flexible, waterproof sealant helps prevent water infiltration and structural movement over time.
• Expansion joints and cracks: Concrete naturally expands and contracts due to temperature changes. Without proper sealing, gaps and stress fractures can develop, leading to further deterioration. A high-performance silicone sealant provides long-lasting flexibility, allowing for movement while maintaining a waterproof, durable bond. Sealing these key areas helps preserve concrete strength and appearance for years to come.

Finding the right sealant for concrete areas

Selecting the right sealant for concrete surfaces can be tricky because of a seeming surplus of options on your local hardware store shelf. However, 100% silicone sealants provide unmatched flexibility, waterproofing, and adhesion to porous materials like concrete and stone.

For driveways, patios, walkways, and other high-traffic concrete surfaces, GE Concrete Silicone 2® Sealant is an ideal choice. This permanently waterproof, weatherproof formula is specifically designed for concrete, mortar, and masonry, ensuring a durable bond that resists shrinking and cracking over time. Its quick 30-minute rain-ready cure allows for fast sealing, even in outdoor conditions where weather exposure is a concern.

When choosing a concrete sealant, look for long-lasting adhesion, flexibility, and resistance to temperature changes. A high-performance silicone sealant will remain flexible and will accommodate natural expansion and contraction while providing strong protection against water, dirt, and environmental wear.

How to seal concrete areas around your home

Follow these steps for sealing surfaces, cracks, and expansion joints on your property:

1. Inspect for cracks and gapsExamine your driveway, patio, or walkway for visible cracks, gaps in expansion joints, and signs of water infiltration. Use a small amount of water to check if it absorbs quickly—if it does, sealing is necessary to prevent further damage.
2. Clean surfacesRemove dirt, debris, oil stains, and old sealant using a wire brush or pressure washer. Let the concrete dry completely before applying the new sealant to ensure strong adhesion.
3. Seal cracks and surface gaps with GE Concrete Silicone 2^® sealantFor cracks and minor surface gaps, apply GE Concrete Silicone 2® Sealant. This 100% waterproof, weatherproof sealant creates a strong, long-lasting bond that resists moisture penetration and erosion. Use a caulking gun to apply an even bead along cracks, then smooth it with a finishing tool or gloved finger.
4. Seal expansion joints with GE Supreme Silicone Window & Door Sealant

   

   Expansion joints allow concrete to expand and contract with temperature changes, but without proper sealing, these gaps can collect water, dirt, and debris, leading to structural damage. Apply GE Supreme Silicone Window & Door Sealant, which provides 100% more flexibility, allowing it to move with the concrete without cracking. Ensure a continuous, even bead along the joint and smooth for a clean finish.

5. Allow proper curing timeGE Concrete Silicone 2^® and GE Supreme Silicone are rain-ready in 30 minutes, but full curing takes 24 hours. Avoid heavy traffic in sealed areas during this time for best results.

Parting thoughts for long-term care

To keep concrete surfaces protected, inspect sealed areas every six months for signs of cracking, peeling, or wear. Pay close attention to driveways, patios, walkways, and expansion joints, as these areas experience frequent weather exposure and heavy foot or vehicle traffic.

Clean sealed surfaces with mild soap and water to remove dirt and debris, preventing buildup that could weaken adhesion. If the sealant appears worn or damaged, remove the old layer, clean the area, and reapply a fresh layer of sealant.

FAQs

1. How often should concrete sealant be reapplied? The longevity of a sealant depends on weather conditions, traffic levels, and product quality. GE Concrete Silicone 2® Sealant and GE Supreme Silicone Window & Door Sealant provide long-lasting durability, but inspecting sealed areas every six months and reapplying as needed ensures continued protection.
2. Can I apply concrete sealant in wet or cold conditions? It’s best to apply silicone sealant when the surface is dry and the temperature is above 40°F (4°C). GE Concrete Silicone 2® is rain-ready in 30 minutes, but full curing takes 24 hours for optimal performance.
3. What is the best sealant for expansion joints in concrete? GE Supreme Silicone Window & Door Sealant is ideal for expansion joints, offering 100% flexibility, and allowing concrete to expand and contract without cracking.
4. Can I use GE Concrete Silicone 2® Sealant for crack repairs? Yes, GE Concrete Silicone 2® Sealant is specifically designed for filling and sealing cracks in driveways, patios, and walkways, providing a waterproof, long-lasting bond that resists shrinking and cracking.

To get GE Sealants’ products for your home improvement projects, find a store near you.