DIY Projects with SprayEZ – How to Seal Concrete 

SprayEZ is your best choice to seal your exposed concrete. It is important to seal concrete foundations in your crawlspace or basement to maintain warm temperatures in the winter and cool temperatures in the summer. Concrete is a thermal conductor and heat will move from more dense area to the less dense area. Therefore, cold air will move in during the winter from the exposed concrete in your crawlspace or basement. Sealing a concrete foundation is also important to prevent water from ruining the foundation. Sealing concrete can be a DIY project if one has the right tools and the right knowledge. We will discuss what concrete sealant and how to seal concrete.

What is Concrete Sealant? 

Research from many sources has confirmed that the main source of damage to any exposed piece of concrete is surface moisture intrusion. The most common and often damaging form of surface moisture intrusion is surface scaling or flaking from the freezing and thawing of ice and water. To protect your concrete, a sealant must be applied to the surface. Concrete sealants work by either blocking the pores in concrete, preventing absorption of moisture or by forming an impassable layer on the concrete, blocking passage of water or salts. Concrete sealers fall into two categories, topical and penetrative.

         Topical Sealers

These are applied to the surface of the concrete and form a layer which blocks the passage of surface water. Topical sealers typically last a maximum of five years and may cause the surface of the concrete to become slippery when wet.

         Penetrative Sealers

The concrete absorbs these sealers and forms a chemical bond which prevents the absorption of moisture or salts. Typically, these sealers last at least five years or more.

When to Seal Your Concrete 

When deciding to seal a patch of exposed concrete, you want to ensure that the weather is dry and will remain dry for the next two to three days. Also, if you are working with a new patch of concrete, you must let it cure for approximately twenty-one days to a month before sealer can be applied. Concrete must be completely dry before the sealer is applied.

Materials You Will Need

To seal your concrete, you will need the following tools and materials:

  • Spray Foam
  • Spray Foam Gun
  • Protective Gear
  • Thermal Sealer (if leaving spray foam exposed over the concrete)
  • Chemical Stripper
  • Concrete Repair
  • Degreaser
  • A Broom

Step One: Clean and Prepare the Concrete

To begin, you first thoroughly clean the concrete of any loose dirt and debris that may be present on the surface. Next, you will have to remove any oil, grease or other hard to remove materials that may have affected the concrete. That is where items like the degreaser and chemical cleaners come in to play. A pressure washer may be helpful here as well. Next, you use clean water and floor cleaner to do a final rinse of the surface of the concrete. After this, the concrete needs to be allowed to dry for twenty-four hours.

Step Two- Remove Old Sealant

If your concrete has been previously sealed, you will have to remove the old sealer before applying a new coat. If you are unsure whether the concrete has been sealed previously, simply pour some water onto the concrete. If you observe that the water beads up over the concrete, then the concrete has been sealed previously. Chemical stripper is the easiest do it yourself option to remove any previous sealer. This step may be skipped if you are certain the concrete has not been sealed.

Step Three- Apply Fresh Concrete Sealant

After the twenty-four hour drying period, it is time to apply the concrete sealant. Conditions need to be dry, and you should have good ventilation.

Why Is It Necessary to Seal Concrete

There are several excellent reasons to seal your exposed concrete. Some of these reasons are as follows:

         Create a More Comfortable Home

When you insulate the exposed concrete in your home’s foundation the floors in the home will be warmer. This is especially true of ceramic tile floors and laminated wood floors. Everyone knows how uncomfortable it can be to walk from wood floors or a carpeted floor to a cold concrete floor in the fall, winter or spring. By insulating the exposed concrete of your foundation, the floors in the home will be warmer. Insulating your home will also lower your reliance on heat. Therefore, you will have less dry hot air blowing into your home.

Prevent Surface Damage

Sealing your concrete helps prevent surface damage and normal wear and tear that occurs with regular use. Surface moisture and its permutations such as ice and frost all take a heavy toll on concrete, as does regular day to day use.

         Prevents Seepage Damage

If your concrete is not properly sealed, moisture may penetrate to the depths of the concrete. There, the moisture can wreck untold havoc on your concrete. If your concrete has steel rods for reinforcement, deep seeping moisture may cause these rods to rust and rot. The rods will rust and ruin the structural integrity of your concrete over time.

If you would like more information about sealing concrete with spray foam, please contact a SprayEz representative. We would be more than happy to answer your questions and get your started on a DIY home insulation project.