is siliconized sealant the same as silicone sealant


Siliconized Sealant or Silicone Sealant: Unveiling the Differences and Similarities in the World of Sealants


When it comes to sealing gaps or cracks in various surfaces, siliconized sealant and silicone sealant are two widely used options. Although they sound similar, there are key differences between the two and understanding those distinctions is crucial in order to make an informed decision about the appropriate sealant for your specific project. This article aims to explore the dissimilarities and similarities between siliconized sealant and silicone sealant, helping you determine which product is best suited for your needs.

I. Understanding Siliconized Sealant:

Siliconized sealant, as the name suggests, is a type of sealant that contains a small proportion of silicone. It is primarily composed of an elastomeric polymer along with additives that provide strength and adhesion properties necessary for sealing applications. The primary purpose of siliconized sealant is to seal gaps, cracks, joints, and seams in various surfaces and prevent air, water, or other substances from passing through.

II. Exploring Silicone Sealant:

On the other hand, silicone sealant is a sealant that is made entirely of silicone materials. It is formulated with polysiloxanes, which are silicone-based polymers. Silicone sealant is renowned for its exceptional resistance to extreme temperatures, chemicals, and UV radiation. It is highly flexible, making it suitable for applications that may experience significant expansion or contraction.

III. Key Differences between Siliconized Sealant and Silicone Sealant:

1. Composition:

The primary difference between siliconized sealant and silicone sealant lies in their composition. Siliconized sealants contain a small amount of silicone, usually around 5-20%, while silicone sealants are entirely composed of silicone materials. This distinction affects the overall performance and characteristics of the sealants.

2. Flexibility and Durability:

In terms of flexibility, silicone sealants outshine siliconized sealants. Due to the higher concentration of silicone, these sealants can withstand greater movement and expansion in materials. They remain flexible even in extreme temperature variations. On the other hand, siliconized sealants are moderately flexible and may not provide the same level of durability in applications that require higher flexibility.

3. Temperature Resistance:

Silicone sealants are highly temperature resistant and can endure both high and low temperatures without losing their sealing properties. They remain stable and effective in environments that experience extreme temperature fluctuations. Conversely, siliconized sealants may exhibit some degradation in extreme heat or cold conditions, affecting their sealing ability.

4. Adhesion Properties:

Both siliconized and silicone sealants offer excellent adhesion to various materials, such as glass, metal, wood, and plastic. However, due to the higher silicone content, silicone sealants tend to provide superior adhesion on a wider range of surfaces. This allows for better overall sealing performance in different applications.

IV. Commonalities between Siliconized Sealant and Silicone Sealant:

1. Versatility:

Both siliconized sealant and silicone sealant are versatile and can be used for various sealing projects. They are suitable for indoor and outdoor applications and can be applied on different surfaces, including windows, doors, roofs, and plumbing fixtures.

2. Waterproofing Capability:

Both sealants offer exceptional water resistance, making them ideal for sealing applications in areas that are exposed to moisture, such as bathrooms, kitchens, and basements. They prevent water leakage and effectively protect against water damage.

3. Chemical Resistance:

Both siliconized sealant and silicone sealant exhibit excellent resistance to chemicals, including acids and bases. This characteristic ensures that the sealants remain intact and effective even in harsh chemical environments.

4. Easy Application:

Both sealants are easy to apply and can be used with a standard caulking gun or squeeze tube. They come in various colors to match different surfaces and can be painted over once cured.


While the terms "siliconized sealant" and "silicone sealant" may sound similar, it is evident that they are not the same. The key differences lie in their composition, flexibility, temperature resistance, and adhesion properties. Silicone sealants offer superior flexibility, durability, and temperature resistance due to their pure silicone composition. On the other hand, siliconized sealants contain a lower percentage of silicone and may be more suitable for less demanding sealing applications. Understanding these differences will help you make an informed choice while selecting the appropriate sealant for your particular project. So, whether it's siliconized or silicone, sealing your gaps and cracks with the right product will provide lasting protection and peace of mind.


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