Concrete sealer prevents water and other liquids from penetrating concrete, extending its life. Acrylics are cheaper but break down quicker, while solvent-based sealers are more expensive but last longer. Breathable sealants are better in freezing temperatures. The sealer can be applied with a sprayer or roller and comes in different colors. Appearance is secondary to functionality.
A concrete sealer is a product that prevents water and other liquids from penetrating or being absorbed into concrete products. This is important to prevent contaminants and cracks within the concrete. Depending on the concrete sealer, it can be made from petroleum or acrylic products and can come in many different colors. The product chosen often depends on the situation and climate in which it is used.
The main benefit of a concrete sealer is its ability to extend the life of the concrete. When water and other contaminants get into concrete, it can cause problems. Acids, for example, can corrode concrete to the point where it falls apart. Water, if it freezes inside concrete, can expand as it freezes and contract as it thaws. This can cause cracks to form within the concrete surface and lead to overall deterioration.
Choosing between acrylic and petroleum-based or solvent-based concrete sealers largely depends on cost. Acrylics are cheaper and easier to apply in most cases, but they break down quicker and therefore need to be reapplied more often. They are also more susceptible to breakdown from oils and fuel and therefore may not be the best choice for driveways. Solvent-based concrete sealers are more expensive, but offer a more cost-effective option for those who don’t want to repeat applications very often.
Another thing to consider about concrete sealers is whether to choose a breathable or non-breathable product. Both can protect concrete, but breathable sealants allow water vapor to escape from the concrete as it rises from the ground. If vapor gets trapped in the concrete and freezes due to a non-breathable concrete sealant, cracking can occur. Therefore, if you’re in a climate with freezing temperatures for significant periods of time, a non-breathable concrete sealer is probably a bad choice.
The concrete sealer can be applied as soon as the concrete has time to harden. Before application, the concrete must be washed with detergent and pressure washer and allowed to dry completely. The sealer can be applied with a sprayer or roller, similar to a painter’s but much wider. The sealant must be applied in an even layer without letting it stagnate.
Appearance is secondary to the functionality of concrete sealers. The products are available in a variety of colors for those who want to create a unique look for their concrete project. Acrylics also have the ability to impart a glossy or lustrous finish to concrete, which may also be desired.
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