With so many different types of concrete sealers it can be hard to determine how one concrete sealer differs from the next which is why we decided to make a concrete sealer comparison chart comparing the most popular types of concrete sealers.
Concrete Sealer Comparison Chart
|Silicate Sealer||Silane Siloxane Sealer||Acrylic Sealer|
|Works below the surface||Works below the surface||Sits on the surface|
|Won’t change the look of the concrete||Won’t change the look of the concrete||Leaves behind a visible surface film|
|Matte||Matte||Low gloss and high gloss|
|Lasts forever||Lasts 7-10 years||Lasts 1-4 years|
|Increases the strength of the concrete||Reduces surface water absorption||Enhances and protects surface|
The three most popular types of concrete sealers are silicate sealers, Silane-Siloxane sealers (water repellent sealers), and acrylic sealers.
- Silicate sealers are classified as concrete densifiers and are used to increase the surface strength and density of concrete. They will not change the look or color of the concrete, and the concrete will look exactly as it did before being sealed.
- Silane-Siloxane sealers are classified as water repellent sealers and are used to reduce surface water absorption in order to reduce cracking, spalling, pitting, mold and mildew, and efflorescence. They will not change the look or color of the concrete, and the concrete will look exactly as it did before being sealed.
- Acrylic sealers are classified as sealers, but leave behind a visible surface film (or coating). They enhance the concrete with a low or high gloss finish, and come in clear and color options. They provide complete surface protection.
When applying a concrete sealer to unsealed concrete, you can choose a sealer based on what you want the concrete to look like once sealed and how you need it to perform. If your concrete is already sealed, or has been sealed in the past, you want to make sure that the new sealer is compatible with the sealer currently on the concrete.
- Silicate sealer: If the concrete was previously sealed with a silicate sealer, it can be re-coated with a Silane-Siloxane concrete sealer or an acrylic sealer.
- Silane-Siloxane Sealer: If the concrete was previously sealed with a Silane Siloxane concrete sealer it can be resealed with a Silane-Siloxane sealer or a solvent based acrylic sealer. Silane-Siloxane sealers will repel a silicate sealer or a water based acrylic sealer.
- Acrylic Sealer: If the concrete was previously sealed with an acrylic sealer it needs to be re-coated with a compatible acrylic sealer. Water based acrylic sealers need to be re-coated with water based acrylic sealers, and solvent based acrylic sealers need to be re-coated with solvent based acrylic sealers. If a water based acrylic sealer is applied over a solvent based acrylic sealer, or a solvent based acrlyic sealer applied over a water based acrylic sealer, then the solvent based will attack the water based and result in coating failure.