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What is mortar sealant and how should I use it? - NFLG Dry Mortar Plant Supplier

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What is mortar sealant and how should I use it?

April 23, 2023 jinchen 0 Comments

Overview of mortar sealant

A photo of a mortar sealer

Mortar sealant is a material specially used to close the pores on the surface of mortar, which can effectively improve the durability and impermeability of mortar. The main components of mortar sealers include acrylate copolymers, silicates, polymers, etc. It has the characteristics of waterproof, moisture-proof, mildew-proof, and anti-corrosion, which can protect the mortar surface from external erosion and prolong the service life of the mortar.

The Role of mortar sealant

A photo of a mortar sealer

Closed pores

Pores on the surface of mortar are one of the main reasons for easy penetration and damage to mortar. Sealants can fill the surface pores of mortar, make the surface of mortar smooth and hard, and improve impermeability and durability.


Sealant has good waterproof performance, which can prevent moisture from penetrating the mortar, causing problems such as expansion and cracking of the mortar, thereby protecting the mortar from moisture.

Anti-mildew and anti-corrosion

The mortar sealant also has the characteristics of anti-mildew and anti-corrosion, which can prevent the influence of external factors on the mortar and make the surface of the mortar clean and beautiful.

Improve the surface hardness of mortar

Sealants can form a hard and smooth film, improve the surface hardness and wear resistance of the mortar, and reduce the wear of the mortar.

Types of mortar sealant

A photo of a mortar sealer

According to different application fields and effect requirements, sealants can be divided into the following categories:

Solvent-free mortar sealer

The solvent-free sealant does not contain any organic solvents, has good environmental protection, and will not cause harm to the environment and the human body. It is waterproof, mildew-proof, moisture-proof, and corrosion-resistant, and is suitable for sealing surfaces such as indoor and outdoor walls, roofs, basements, and bathrooms.

Solvent-based mortar sealer

The solvent-based sealant contains organic solvents, has good permeability and adhesion, can penetrate deep into the pores of the surface, form a tough protective film, and improve the durability and impermeability of the mortar. However, because it contains organic solvents, it is harmful to the environment and the human body, so it should be used in a well-ventilated environment.

Polyurethane Mortar Sealant

Polyurethane sealant has good elasticity, anti-aging performance, and chemical resistance, can resist the erosion of ultraviolet rays, air pollutants, and chemical substances, and has excellent waterproof, moisture-proof, mildew-proof, and corrosion-resistant characteristics. Surface sealing for demanding buildings and structures.

The use of mortar sealant

Before using the sealant, the surface of the mortar must be cleaned to remove surface dust and impurities and ensure that the surface of the mortar is dry.

According to the instructions for the sealant, apply the sealant evenly on the surface of the mortar, and you can use tools such as brushes, rollers, and spray guns to apply.

Depending on the nature and thickness of the sealer, the number of layers to be applied and the drying time will need to be determined.

After application, the surface of the mortar should be kept dry, and construction and operation should be avoided before the sealant is completely dry.

Precautions for mortar sealant

A photo of a mortar sealer

When using sealant, it should be operated by the requirements of the instructions to avoid excessive use or excessive dilution.

When using sealant, care should be taken to protect eyes and skin, and avoid direct contact, and inhalation.

Mortar sealant will produce a peculiar smell during construction and should be operated in a well-ventilated environment.

Sealants should be stored in a cool, dry, and ventilated place away from high temperatures and direct sunlight.

Different types of sealants have different scopes of application and methods of use. Before use, read the instructions carefully and follow the relevant regulations.

A photo of a mortar sealer

Mortar sealant is an effective means to improve the durability and waterproof performance of surfaces. At present, there are many different types of sealants to choose from on the market. You should choose the appropriate product according to your actual needs, carefully read the instructions, and abide by the relevant regulations before use. During the use of mortar sealant, attention should be paid to construction operations and personal protection to protect the environment and human health.

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