Waterproof mortar or waterproof paint: Which one should you choose for your project?

When it comes to protecting structures from water and moisture, waterproof mortar and waterproof paint are always the two top solutions to consider. However, choosing the right type depends on many factors such as material properties, intended use and budget. In this article, we will explore these two materials in detail, compare their strengths and weaknesses to help you make the best decision.

Learn about waterproof mortar and waterproof paint

1. Learn about waterproof mortar

Waterproof mortar is a mixture of cement, sand, chemical additives and waterproofing agents, helping to prevent water from penetrating the concrete surface. Chemical additives increase durability, flexibility and water resistance. In addition, non-shrink grout and pre-mixed dry mortar are also commonly used. Non-shrink grout helps prevent water seepage in cracks without shrinkage, while pre-mixed dry mortar is convenient, easy to use and saves construction time but still ensures effective waterproofing.

Types of waterproof mortar can include:

Cement-based waterproof mortar: This type of mortar uses cement as the main ingredient combined with waterproofing additives to create a protective layer. This is the most popular type of waterproof mortar, widely used in construction works.
Polymer waterproof mortar: This mortar contains polymers to increase adhesion and durability during construction, suitable for works requiring high elasticity. Bituminous waterproof mortar: Mainly used in underground construction works or areas in direct contact with groundwater.

Waterproof mortar helps prevent water from penetrating into concrete surfaces

Advantages of waterproof mortar:

Excellent waterproofing ability: Waterproof mortar has the ability to prevent water from seeping through concrete structures, protecting the construction from water intrusion, especially in areas with high water pressure.

High durability: Waterproof mortar often has a long lifespan, helping to protect concrete structures from degradation due to the effects of water and humidity. Using waterproof mortar will help the construction avoid leakage throughout the life of the construction.

Good adhesion: Waterproof mortar has the ability to adhere tightly to the concrete surface, helping to create a durable protective layer that does not peel or crack like other waterproofing materials.

Flexible application: Waterproof mortar can be used in many different conditions, from underground constructions to areas that can be in direct contact with water, such as basements, swimming pools, water tanks, roofs and surrounding walls of the construction.
Easy to apply: Although waterproof mortar requires certain construction techniques, if applied properly, it is easy and effective, saving construction time compared to some other waterproofing methods.
Disadvantages of waterproof mortar

High cost: Compared to other waterproofing methods such as waterproof paint, waterproof mortar has a higher construction cost. This may be a factor to consider if the budget for the project is limited.
High technical requirements: Waterproof mortar construction requires experienced technicians to mix the mortar in the right proportion and apply the mortar layer properly. If not applied properly, the waterproof mortar may not be as effective as desired.
Long construction time: Waterproof mortar needs time to dry and harden, so the construction process may take longer than other waterproofing methods such as painting. This can prolong the completion time of the project.

Construction of waterproof mortar requires high technique

2. Learn about waterproof paint

Waterproof paint is a type of paint that can create a solid protective layer on the surface of building materials such as walls, floors, and roofs, helping to prevent water from seeping into the structure. Waterproof paint is often composed of polymer resin, silicon, rubber, and chemical additives that increase adhesion, elasticity, and water resistance.

Common types of waterproof paint include:

Acrylic-based waterproof paint: This type of paint is commonly used in civil works. It has good adhesion and is resistant to weather effects, easy to construct and maintain.
Bitumen-based waterproof paint: This type of paint is used for areas with high humidity or frequent contact with water. Bitumen paint has good waterproofing ability, suitable for concrete surfaces, roofs, and underground structures.
Silicone waterproof paint: This type of paint has excellent water resistance and good adhesion to brick, stone, and concrete surfaces. Silicone paint is often used in high humidity areas such as bathrooms, swimming pools, or surfaces in direct contact with water.

Waterproof paint helps create a protective film on the surface of building materials.

Advantages of waterproof paint:

Simple and quick construction: Compared to other waterproofing materials such as waterproof mortar, waterproof paint can be easily applied by brushing, rolling or spraying directly onto the surface to be protected. Construction time is quick, not requiring too many preparation steps.
Reasonable cost: Waterproof paint has a lower construction cost than other solutions such as waterproof mortar. This makes it an ideal choice for projects with limited budgets or areas that need temporary waterproofing protection.
Aesthetics: In addition to waterproofing, waterproof paint also helps create a shiny, clean and easy-to-clean surface. Waterproof paint also comes in a variety of colors, helping the project not only waterproof but also highly aesthetic.
Disadvantages of waterproof paint:

Low durability: Easily peels or loses effectiveness after long periods of exposure to harsh weather.
Surface dependent: Only effective when surface is thoroughly treated prior to application.

Using waterproof paint brings high aesthetics to the surface

3. What is the difference between waterproof mortar and waterproof paint?

To better understand the difference between waterproof mortar and waterproof paint, let’s compare these two materials through important criteria such as durability, waterproofing ability, construction time, and cost. Below is a detailed summary table to help you make an easy decision:

4. Should I choose waterproof mortar or waterproof paint?

Each product has its own strengths and advantages, so the choice between waterproof mortar and waterproof paint depends on the specific needs of the project:

You can choose waterproof mortar if:

The project requires long-term waterproofing and high durability.
The construction area is often exposed to water such as swimming pools, basements.
Or you can choose waterproof paint if:

You prioritize aesthetics and need a quick solution.
The project is not greatly affected by water or humidity.
In addition, if you decide to choose waterproof paint for your project, you can refer to the 2-component waterproof paint LEMAN AT-15 PRO. This is a paint line used for:

Waterproofing, the ability to fill large-scale hairline cracks and is also a protective layer to help prevent the penetration of carbon dioxide.

The product is used for: water tanks, swimming pools, basements, terraces, balconies, gutters, retaining walls, floors, bathroom walls, kitchens, or wet areas. The product also increases salt resistance and does not contain toxic substances, while having good elasticity.

LEMAN AT-15 PRO 2-component waterproof paint is widely used by contractors.

Waterproof mortar and waterproof paint are both important solutions in construction, each with its own advantages and disadvantages. Choosing the right type will help optimize the efficiency and longevity of the project. Hopefully this article has provided useful information for you to make a decision that suits your needs.