How Difficult Is It Sealing Concrete?

How Difficult Is It Sealing Concrete?

Sealing concrete, at first glance, might seem like a straightforward task reserved for professionals or those with a passion for DIY home improvement projects. However, the process encompasses a series of steps that require careful attention to detail, a solid understanding of the materials involved, and a bit of patience. The difficulty of sealing concrete can vary widely, influenced by factors such as the condition of the concrete, the type of sealer used, and the environmental conditions. In this article, we’ll delve into the task at hand and shed light on it’s complexities.

Understanding the Concrete

Before a paintbrush ever soaks in sealer, the first step is understanding the type of concrete you’re dealing with and it’s current condition. New concrete must cure for a specific period, often 28 days, before sealing. Older concrete, on the other hand, may require thorough cleaning or repairs. Factors like moisture content, surface porosity, and existing damage play crucial roles in how well the sealer will adhere and perform. Ignoring these elements can lead to peeling, flaking, or a failure to protect the concrete effectively.

Choosing the Right Sealer

With a range of sealers available, from acrylic and epoxy to penetrating and polyurethane, selecting the right one can be daunting. Each type offers different benefits, such as improving colour, providing a glossy finish, or offering superior protection against water and oil. The choice depends on the desired aesthetic, the specific protection needed, and the concrete’s location. Making an ill-informed decision can result in unsatisfactory results or the need for a reapplication sooner than anticipated.

Preparing the Surface

The success of sealing concrete is largely determined by the preparation of the surface. This step is often underestimated but can be the most labour-intensive part of the process. It involves cleaning the concrete thoroughly to remove dirt, grease, and any previous coatings. Specialised cleaning agents may be required for tough stains, and in some cases, the surface must be etched to improve the adhesion of the sealer. Skipping or inadequately performing this step can compromise the sealer’s effectiveness and longevity.

Application Challenges

The actual application of the sealer introduces it’s own set of challenges. Environmental conditions such as temperature, humidity, and wind can affect the sealer’s drying and curing times, as well as it’s finish. Applying the sealer too thickly or unevenly can lead to issues like bubbling or streaking. Furthermore, some sealers emit strong fumes, necessitating proper ventilation and personal protective equipment. The need for precision, coupled with the physical demands of applying the sealer evenly across large areas, adds to the complexity of the task.

Maintenance and Longevity

Even after the sealer is applied, the task isn’t over. Concrete sealers require maintenance to retain their protective qualities and appearance. Traffic, weather, and UV exposure can degrade the sealer over time, necessitating reapplication every few years. Understanding the sealer’s lifespan and maintenance requirements is crucial for ensuring the concrete remains protected in the long term.


While sealing concrete is not a difficult task, it is certainly not as straightforward as one might initially think. It demands a thorough understanding of the materials involved, meticulous preparation, and careful application. The difficulty of sealing concrete can vary, but with the right knowledge and approach, it can be managed effectively. Whether undertaken as a DIY project or by professionals, the effort invested in sealing concrete pays dividends in the form of improved durability, appearance, and protection of the concrete surfaces that underpin our homes and communities.

If you have any further questions on sealing concrete, please do not hesitate to contact us on 01772 701474 or email us on

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