/ Blog / What Is Silicone Sealant Used For? A Comprehensive Guide

What Is Silicone Sealant Used For? A Comprehensive Guide

No Tag

What is silicone sealant used for? Silicone sealants are versatile adhesives that are used in a variety of applications. Understanding the different types of silicone sealants can help you choose the right one for your needs.

What is silicone sealant used for

What Is A Silicone Sealant? Common Types Of The Silicone Sealant:

Silicone sealant is a type of adhesive that is commonly used to seal gaps and joints in various materials. It is made from a silicone-based polymer and has a variety of properties that make it ideal for use in various applications.

Common Types of Silicone Sealants:

  • Neutral-cure silicone sealant:

This type of sealant releases alcohol as it cures, which makes it odorless. It is commonly used in applications where the sealant will be in contact with metals or other materials that are sensitive to acidic or corrosive compounds.

  • IG unit sealant:

IG unit sealant is a type of sealant that is used to seal the edges of insulating glass (IG) units. IG units are made up of two or more panes of glass separated by a space filled with air or gas. The sealant is applied to the edges of the IG unit to prevent moisture and air from entering the space between the panes.

  • High-temperature silicone sealant:

This type of sealant is designed to withstand high temperatures and is commonly used in automotive and industrial applications.

  • Structural silicone sealant:

A structural sealant is a sealant used to provide structural support and bonding between two surfaces. Typically used in architectural and engineering applications that require the sealant to withstand high loads and stresses. Structural sealants are typically made from silicone or polyurethane and are designed to provide a long-lasting, durable bond.

  • Weatherproof sealant:

Weatherproof sealant is a type of sealant that is designed to protect against the elements. It is used to seal gaps and cracks in a wide range of surfaces, including roofs, windows, doors, and walls. Weatherproof sealant is designed to be resistant to moisture, UV rays, and extreme temperatures.

  • GP sealant:

GP sealant, also known as General Purpose Sealant, is a type of adhesive that is designed for use in a wide range of applications. It can be used for sealing gaps, joints, and cracks in various surfaces, such as metal, wood, glass, and plastic. GP sealant can also be used as an adhesive to bond two surfaces together.

What Is Silicone Sealant Used For? What Are Its Usage Restrictions?

Before understanding this question, we need to briefly understand the function of silicone sealant.

Properties of Silicone Sealant:

Silicone sealants are highly resistant to heat, moisture, and chemicals, making them ideal for use in areas that are exposed to these conditions. They are also highly flexible, which allows them to expand and contract with changes in temperature without cracking or breaking.

Next, take Joinstar's DOWSIL™ HAOSHI NT Sealant as an example to explain what is silicone sealant used for.


DOWSIL™ HAOSHI NT Sealant is a single-component neutral curing silicone sealant produced by Dow. It is available in various colors, including transparent, white, black, and gray, making it easy to match with surrounding materials.

What is silicone sealant used for

The sealant is highly flexible and resistant to heat, moisture, and chemicals, allowing it to expand and contract with temperature changes without cracking or breaking.

It can be used for various purposes, including:

  • Window and door sealing:

This sealant can be used to seal gaps around windows and doors, providing a waterproof and airtight seal.

  • Bathroom and kitchen sealing:

Due to its resistance to moisture and chemicals, this sealant is ideal for sealing areas in the bathroom and kitchen, such as sinks, bathtubs, and showers.

  • Electrical and electronic applications:

The high-temperature resistance of this sealant makes it suitable for use in electrical and electronic applications, such as sealing around wires, connectors, and circuit boards.

  • Automotive applications:

The flexibility and high-temperature resistance of this sealant make it ideal for automotive applications, such as sealing around windows, doors, and sunroofs.

Restrictions on using This Sealant:

  • Not Suitable for Structural Glazing:

DOWSIL™ HAOSHI NT Sealant is not suitable for use in structural glazing applications, such as attaching glass to a frame.

  • Not Recommended for Submerged Areas:

This silicone sealant is not recommended for use in submerged areas, such as swimming pools, as it is not designed to withstand prolonged immersion in water.

  • Not for Use on Porous Surfaces:

It is not recommended to use this sealant on porous surfaces, as it may not adhere properly, leading to potential leaks.

What Should I Pay Attention To When Using Silicone Sealant?

Silicone sealant is a popular adhesive used in a variety of applications. However, certain precautions should be taken when using it to ensure proper application and avoid potential issues.

1. Surface Preparation:

The surface is sealed with silicone sealant and should be clean, dry, and free of any dirt, dust, oil, or other debris. This will ensure that the sealant adheres properly and prevents any air pockets from forming.

2. Application Method:

Silicone sealant can be applied using a caulking gun or by hand. Whichever method is used, it is important to apply the sealant in a smooth and even manner to ensure proper coverage and avoid any gaps.

3. Tooling:

After applying the silicone sealant, it is important to tool it properly. Tooling refers to the process of leveling the sealant to ensure good contact with the surface being sealed. This can be done with special tools or with fingers, other tools.

Benefits Of Choosing Silicone Sealants From Joinstar:

The DOWSIL™ HAOSHI NT Sealant mentioned above is a product provided by Joinstar. Joinstar cooperates with many well-known suppliers to provide the best quality products. If you choose Joinstar, you will get many benefits:

High-Quality Products:

Joinstar cooperates with well-known suppliers to provide high-quality silicone sealants that meet industry standards.

Wide Range of Options:

Joinstar offers a wide range of silicone sealants with different properties, such as neutral cure, GP sealant, and structural bonding.

Customized Solutions:

Joinstar provides customized solutions to meet the specific needs of its customers, such as developing new products or modifying existing ones.

Excellent Customer Service:

Joinstar has a professional and responsive customer service team that can provide technical support, answer questions, and offer solutions to any problems that may arise.