Adding a Membrane with Concrete Seal

roller coating concrete cobblestones with sealant
  • 3-5 hours
  • Beginner
  • 50-200
What You'll Need
Concrete sealant
Eye protector
Paint roller or spray
Protective clothing

Concrete sealant is designed to inhibit liquids from seeping into concrete, thus protecting the steel inside it as well as giving it a sort of aesthetic boost. The aesthetic effect can also be improved when the concrete is stained properly. There are many different concrete structures that can be coated with a concrete sealant: these include paver driveways, floors and patios.

The concrete sealant adds an extra membrane to the concrete structure to protect it from the damaging effects of water, corrosive material, oil, and other liquids. Coated concrete lasts longer than non-coated concrete because the sealing effect of the product creates an anti-aging effect on the concrete structure. Here is a guide on adding membrane with concrete sealant.

Step 1 - Determine what Type of Sealant to Use

Concrete sealants come in a variety of types: epoxy, urethane and acrylic. Acrylic is a better choice to consider because it is non-flammable and non-hazardous. This type of sealant does not allow water to penetrate through the membrane.

However, some people may prefer epoxy because it forms a harder membrane on the concrete. When using this type of sealant, make sure that the concrete is thoroughly dry; otherwise the water trapped inside may become an issue as epoxy does not allow trapped moisture to escape easily.

The least cost-effective of all types is urethane. The sealant provides the most effective finish against damage, but it does not bond very well with the concrete so it is recommended that it is used after an epoxy finish. In addition, re-application of the product is very expensive, especially on a wide area of concrete surface. Make a wise decision when choosing what type to use.

Step 2


Prepare the Concrete Surface

Clean the concrete surface thoroughly and allow it to dry before applying concrete sealant. Consider using soap and a water hose. The hose allows easier cleaning especially for wider areas.

waterproof concreate sealant

Step 3


Apply Concrete Sealant

Apply concrete sealant on the concrete surface using either a paint roller or a spray bottle. A paint roller does not provide a better quality finish, but it is a good option to use when dealing with a wide surface area. However, it pays to use a spray bottle because it creates a finer coating. Make sure to coat the concrete evenly and never leave any surface uncoated.

An uncoated area may allow water to seep through. Trapped moisture is difficult to remove, especially when using an epoxy sealant. Allow the coating to dry for about one to seven days depending on the type of sealant used. Check out the information provided by the manufacturer. Apply a second coating if necessary.

Step 4


Stain the Concrete

Staining or painting adds beauty to the coated concrete, but this step is optional.

As a reminder, always use protective covering on the hands, eyes and skin when working with chemicals.