Is Polyurethane Waterproofing on Concrete?

Polyurethane coating is moisture-intolerant and sturdy, provided the layers are doubled or quadrupled. It forms a plastic-type surface that prevents water ingress as the floor undergoes thermal fluctuations.

Liquid polyurethane should not be applied in areas where moisture is present. A chemical reaction takes place if the liquid comes in contact with moisture. More specifically, foaming and bubbling occurs on the surface. Polyurethane does not permit moisture to escape from the concrete surface, thereby, posing problems for residents or workers.

Concrete is a porous material that can absorb water, leading to issues like moisture damage, structural deterioration, and mold growth. To counter them, a waterproofing solution is necessary. And, polyurethane is one of the best options available on the market. However, it is not 100% water-proof.

Polyurethane coatings are available in different forms, such as liquid membranes or spray-applied systems. Every coating creates a protective barrier that prevents water from trickling into the inner material, i.e., concrete. Some companies develop polyurethane paint especially for outdoor use; the covering has extra additives that help restrict the effects of natural elements.

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Advantages of Polyurethane Coating

One of the most important features of polyurethane coating is flexibility. Unlike rigid materials, polyurethane has elastomeric properties, meaning it can stretch and contract without cracking or losing its effectiveness as a waterproofing barrier. This flexibility allows it to accommodate the natural movement and settling of concrete, ensuring long-lasting protection against water ingress.

Another advantage of polyurethane is its resistance to various environmental factors. It can withstand UV radiation, extreme temperatures, and chemical exposure, making it suitable for interior and exterior applications.

What Happens if Polyurethane Coating Gets Wet?

Before assessing the situation on hand, you need to answer two important queries:

How much moisture is present on the surface?
What is the duration of the standing liquid?

With regards to the coating type, oil-based polyurethane layer will take longer to disintegrate than water-based polyurethane coat. Make sure that you wipe out the water in quick time, otherwise the wood or concrete layers would lose their strength.

How to Apply Polyurethane Coat?

Surface Preparation

If concrete surface needs a check, opt for Lakhwa Chemical Services. Their experts are renowned for applying polyurethane coats across Pakistan. Cracks or holes (if present) will need a strong fix. And, if the surface is in perfect condition, grind it with an abrasive tool. This process helps in removing excess layers of resin or paint.

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Priming

Apply a primer before you coat the surface with polyurethane. This layer reinforces the connection between the paint and surface. Some individuals opt out of the priming process, stating high expenditures and time loss as the main factors. Generally, three days is the maximum time period that the process takes (priming and coating).

Coarse grit is sprinkled on the primer to let the polyurethane adhere well. Some people use a blower to remove excess gravel. Ensure that the priming layer is dry before applying the liquid chemical.

Mixing Polyurethane Components

There are four essential parts of a polyurethane solution:

Resin
Hardener
Colorants
Aggregate

N.B. Make sure that you know the correct proportions to create a smooth surface. Also, measure the entire area.

You will also need to add powder or color paste to enhance aesthetics.

Applying the Mixture

Pour the liquid chemical over the surface and smooth it with a rake, hand trowel, or squeegee. The time period of completing the task will reduce if you have added self-leveling components. Also, ensure that the quantity of the labor force is high (for larger areas).

N.B. If you find bubbles in the mixture, use spiked shoes or rollers.

Polyurethane is an effective waterproofing material for concrete surfaces. It is composed of different ingredients, including resin, hardener, additives, and more. To apply, clean and prime the surface, and apply the liquid chemical with different tools. Polyurethane coat provides a reliable and long-lasting waterproofing solution for concrete.

Connect with Lakhwa Chemical Services for an outstanding result.