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Sealant for Basement Walls are below-the-ground spaces affected by numerous issues, such as rising water table, improper drainage system, and concrete shrinkage. Homeowners and realtors take necessary measures to address the problem: Some prefer DIY solutions while others call up waterproofing experts.

Technically, water seepage occurs through the walls of the basement or any crevice in the floor lining. Incomplete construction, inadequate materials, and poor waterproofing application are common causes of a leaking cellar. If you are facing a similar issue, call up Waterproofing.pk today!

Sealants for Basement Walls

When searching for a sealing agent, acrylics, urethanes, and epoxies are not preferable. These solutions fail to adhere to the surface due to water ingress. Silicate/Siliconate mixture, however, is advertised as an effective solution. When it is applied on the surface, the silicate molecule densifies while the siliconate molecule reacts and develop a tough water-resistant layer. Silane/Siloxane sealers are preferred for waterproofing basements too.

Following are some of the best sealants used for waterproofing basement walls:

1. Silicone Sealant

Silicone is a type of adhesive sealant commonly used in DIY and construction projects. The covering is formulated to have different degrees of flexibility and hardness, depending on the application. Silicone sealant is applied with a caulking gun for interior and exterior applications. It is used on a variety of surfaces, including wood, metal, plastic, concrete, and more. In addition, it protects the surface from moisture ingress, UV rays, and extreme temperatures.

The price of a silicone sealant tube is 600 – 1500 Rs.

N.B. The cost depends on the milliliters or gm of chemical in the tube.

 Read More

How to Control Basement Moisture in Pakistan?

2. Polyurethane Sealant

Unlike silicone sealant, polyurethane adhesive can be painted over, which helps to improve aesthetics and enhance outlook. Moreover, it is abrasion-resistant and does not shrink. Polyurethane coating can be applied through pressing, layering, spraying, and brushing. There are different types of polyurethane sealants available on the market:

• Standard Polyurethane Sealant
• Polyurethane Construction Sealant
• Non-staining Polyurethane Sealant
• UV-resistant Polyurethane Sealant

The price of polyurethane sealant tube in Pakistan is: 2500-5000 Rs.

N.B. The cost depends on the milliliters or gm of chemical in the tube.

3. Epoxy Sealants

Epoxy sealants are used on concrete, masonry, and other materials. This compound consists of two separate components that undergo a strong reaction when combined together. Epoxy sealants consist of a hardening agent and a resinous material suspended in solvent or water.

Epoxy sealants are divided into three types:

• Solvent-based
• Water-based
• 100% solids

Solvent-based epoxy sealant works on the principle of liquid addition to the chemical, enhancing its strength against petroleum contamination in concrete. Some of its advantages are:

• High durability and performance
• Shiny finish
• Long pot life
• Strong adhesion

Water-based epoxy sealant is eco-friendlier because of its lower VOC-content than other types. In addition, it has a non-pungent smell. Water-based epoxy sealant is used for concrete floors, walls, and other surfaces. Lastly, it is resistant to UV rays, moisture, and various types of chemicals.

100% solids epoxy sealant contains epoxy resins and hardeners, without any solvents and diluents. In other words, the entire product maintains 100% thickness after the curing process. This coating produces a thicker film than water-based or solvent-based types.

It provides excellent durability for different surfaces like concrete and metal. A well-installed 100% solids epoxy coat can last for up to 20 years or more.

The price of epoxy sealants in Pakistan (resin-hardener type) for 1kg is 4200 Rs.

N.B. The price depends on the quality, type and quantity of epoxy sealant.