How to Seal a Concrete Patio
It is very important to seal a concrete patio. If it is not sealed, cracks can develop in it during colder climates. Also, moss and algae can grow in the concrete or it may be stained. Sealing the concrete prevents moisture from entering it. A few basic steps can be taken to seal it and prevent the concrete from serious damage.
- Check the weather and make sure that there are no predictions of rain for the next 5 days. Make sure that the weather will above 5 degrees Celsius and ideally below 30 degrees Celsius during the five day time period.
- Brush the concrete thoroughly to remove and loose dirt, oil and debris.
- Spray the concrete with a high-powered water hose in order to remove any other dirt or debris that may be present. Wait for the concrete to be completely dry.
- Pour bleach and water. Brush the detergent and water on any stains that are present on the concrete. This will remove any remaining stains and brighten the concrete.
- Spray water onto the surface to remove any bleach. Wait for the patio to dry.
- Spray one coat of the sealant onto the surface. Make sure that you use a low powered hose when applying the sealant. Apply the coat evenly across the surface. If it is not applied evenly, a white coat will appear on the surface when it dries. Allow the patio to dry overnight.
- Apply the second coat of the sealer. Wait for the patio to dry.
- Spray the patio with water from a hose and wait ten days for the sealer to take effect.
- Spray the concrete with water and then brush top sealant onto the surface. Make sure that the patio is wet when you apply the top sealant.
- Brush a second coat of top sealant onto the surface. This will be further protection from any penetration of moisture. Wait 36 hours for the patio to completely be dry.