Water-Based vs. Solvent-Based Concrete Sealer

Water-Based vs. Solvent-Based Concrete Sealer: Which is Right for Your Project?

Concrete is a durable and long-lasting material, but it requires proper maintenance to keep it looking its best. One of the most effective ways to protect concrete surfaces is by applying a sealer. Two of the most commonly used types of concrete sealers are water-based and solvent-based. Each has its own advantages, disadvantages, and ideal applications. In this article, we will explore the differences between these two types of sealers and discuss how popular products like Super Shield Sealer, GEM Seal, and Aggreseal compare.

What is a Concrete Sealer?

Concrete sealers provide a protective layer that guards against water, chemicals, oils, and environmental wear. This helps extend the life of concrete surfaces, preventing cracking, scaling, and staining. When choosing a sealer, understanding whether a water-based or solvent-based formula is more suitable for your project is critical.

Water-Based Concrete Sealers

Water-based concrete sealers are formulated using water as the primary carrier of the active sealing ingredients. These sealers are popular due to their ease of use, eco-friendliness, and low VOC (volatile organic compound) content, making them ideal for indoor applications or areas with stricter environmental regulations.

Advantages of Water-Based Concrete Sealers:

• Low VOCs and Odor: Water-based sealers emit fewer harmful chemicals, making them more environmentally friendly and suitable for indoor projects.
• Easy Cleanup: Since these sealers use water as a base, they can be easily cleaned with soap and water, reducing the need for harsh solvents during cleanup.
• Non-Flammable: Water-based sealers are non-flammable, making them safer for residential and commercial use.
• Breathability: These sealers allow moisture vapor to escape from the concrete surface, reducing the risk of trapped moisture and potential damage.

Disadvantages of Water-Based Concrete Sealers:

• Appearance: Water-based sealers tend to provide a more natural, satin finish rather than the glossy, “wet look” often desired for decorative concrete.
• Durability: While water-based sealers are great for areas with light to moderate foot traffic, they may not be as durable in high-traffic areas compared to solvent-based options.

Super Shield Sealer

Super Shield from Surf Koat is a high-quality water-based sealer that provides a breathable, protective finish. It is ideal for indoor and outdoor use and offers excellent protection against UV rays, water, and stains. Since it’s water-based, it emits low VOCs and is user-friendly, making it a great choice for residential applications where environmental safety is a priority. 

Solvent-Based Concrete Sealers

Solvent-based sealers use solvents such as xylene or acetone as the carrier for the active sealing ingredients. These sealers are well-known for their durability and ability to create a glossy, wet look on concrete surfaces, which makes them popular for decorative finishes.

Advantages of Solvent-Based Concrete Sealers:

• Glossy Finish: Solvent-based sealers are often preferred for their ability to enhance the color of the concrete and provide a high-gloss, wet appearance.
• Durability: These sealers are extremely durable and hold up well in areas with heavy foot traffic, vehicle traffic, or harsh weather conditions.
• Penetration: Solvent-based sealers tend to penetrate deeper into the concrete, offering better protection against chemicals, oil, and stains.

Disadvantages of Solvent-Based Concrete Sealers:

• High VOCs: These sealers emit higher levels of VOCs, which can be harmful to the environment and to human health, especially when applied in poorly ventilated areas.
• Difficult Cleanup: Solvent-based sealers require strong solvents like xylene or acetone for cleanup, which can be more difficult and hazardous.
• Flammability: Due to the presence of solvents, these sealers are flammable and require careful handling and storage.

GEM Seal Sealer

GEM Seal from Solomon Colors is a solvent-based acrylic sealer that offers a glossy finish, providing that sought-after "wet look" while enhancing the color of the concrete. It is ideal for high-traffic areas and outdoor applications where durability is essential. GEM Seal offers excellent resistance to abrasion and chemicals, making it suitable for patios, driveways, and commercial spaces.

Aggreseal

Aggreseal is a solvent-based sealer from Surf Koat that is designed specifically for decorative concrete surfaces such as stamped concrete and exposed aggregate. It offers a durable, high-gloss finish and comes in a unique brown tint that enhances the natural colors of the surface. With its excellent resistance to chemicals, UV rays, and weathering, it’s a perfect choice for outdoor decorative concrete surfaces that need long-lasting protection and aesthetic enhancement. At Metropolitan Materials, Aggreseal comes in Brown, Clear and Gray. The respective colors help ensure that a project has a widespread, consistent tone. 

Comparing the Two Types of Sealers

Which Sealer is Right for You?

The choice between a water-based and solvent-based concrete sealer depends on the specific needs of your project. If you are working indoors, prioritize low VOCs, or prefer a natural look, a water-based sealer like Super Shield Surf Koat is likely your best option. For outdoor applications or when a high-gloss, decorative finish is desired, a solvent-based sealer like GEM Seal or Aggreseal-Brown may be more appropriate.

By understanding the key differences and carefully considering the application environment, you can ensure the longevity and appearance of your concrete surfaces for years to come. Here at Metropolitan Materials, we have a variety of options when it comes to water-based and solvent-based concrete sealers.