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Garage Floor Sealer

garage floor sealer

Protect your garage floor or its brand new finish with garage floor sealer.

what does sealer do for the garage floor? Besides enhancing the appearance, it protects the floor from stains such as oil and grease, chemical spills, road salt, and everyday wear and tear from vehicle or any kind of traffic.

What type of sealer should you use? Epoxy and urethane sealers provide the best protection for any concrete floor because of thier strength. These sealers are like putting a sheet of hard plastic over the floor. They are expensive but well worth it because you will probably never have to seal the floor again.

But epoxies and urethanes are not always the most suitable garage floor sealer. This depends on whether or not moisture is travelling through the concrete. If there's a vapor barrier (plastic sheeting) underneath the floor then moisture won't be a problem. Most garage floors don't have the plastic underneath. So why is this a problem? concrete with moisture moving up from the subgrade must be able to breathe to allow it to escape. Epoxy and urethane sealers aren't breathable and will prevent the moisture from escaping which could cause structural damage to the surface of the floor.

There's an easy way to test for vapor transfer. Lay down a small (1 sq ft) sheet of clear plastic and tape down all four sides. Wait 24 hours and see if any moisture has accumulated. If so then then you should use an acrylic sealer.

Urethane sealer doesn't bond well with bare concrete, so you must apply a coat of water based acrylic sealer first.

Acrylic sealers are the most commonly used sealers because they are breathable, easy to use, and relatively inexpensive. They are used to cure garage floors as well as provide protection. There are two types of acrylic sealers, water based and solvent based. Solvent based sealers are stronger and last longer than thier water based counterpart. However, they are much more toxic and have a very strong odor. Solvent based sealers are usually your best bet for garage floors if you can tolerate the smell for a while. Water based sealers are ideal if toxicity and odor is a major issue.

Application of garage floor sealer

  • Unless it's freshly placed concrete, apply garage floor sealer with a roller and cut the edges with a brush. You need a pump sprayer to cure and seal fresh concrete.
  • Make sure the floor is completely dry before starting.
  • Apply as evenly as possible making sure not to leave any puddles.
  • Let the roller spread the sealer, meaning you shouldn't push down on it to increase coverage.
  • Be sure to protect your skin and eyes and wear a respirator for any sealer other than a water based sealer.
  • 55 - 85 degrees is the ideal temperature range for application.
  • Allow at least 24 hrs for foot traffic and 72 hours for vehicle traffic. Two coats is best but no more than three.


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