When it comes to choosing a sealant, most people automatically think of silicone. In fact, most of the time, people use the word ‘silicone’ when they mean ‘sealant’. In reality, there is a range of different sealant options. People often compare MS polymer sealants and silicone sealants.

What are silicone sealants?

Silicone sealant is an ointment-like material that solidifies into a tough rubber-like solid when exposed to moisture in the air. Mainly divided into deacetic acid type, dealcoholization type, deamination type, depopulation type. Silicone sealant is commonly known as glass sealant because it is often used for bonding and sealing of glass.

Silicone sealant does not flow under its own weight, so it can be used for joints on top or side walls without sagging, slumping, or running away. It is mainly used for the bonding of dry and clean metals, glass, most non-grease-free woods, silicone resins, vulcanized silicone rubber, ceramics, natural and synthetic fibers, and many painted plastic surfaces. Good quality silicone sealant will not be squeezed out and the physical properties will not change when used below zero degrees Celsius. Fully cured silicone sealant can remain effective at temperatures up to 204°C, but the effective time will be shortened at temperatures as high as 218°C.

What are MS polymer sealants?

MS polymer sealants are a type of sealant made from a hybrid of silane-modified polymer and polyether.  They are often referred to as hybrid polymer sealants and were formulated to combine the characteristics of silicone and other sealant types, such as polyurethanes.  They are typically considered the premium sealant option compared to the ‘cheap and cheerful’ silicones, but you can also find inexpensive MS polymer sealants.

To read more about MS polymer sealants click here.

Advantages of Silicone Sealants

Silicone sealants offer several advantages that make them a go-to choice for many applications. Their high-temperature resistance, capable of withstanding up to 250°C, guarantees durability in extreme conditions.

You’ll appreciate their low viscosity, allowing for straightforward application with caulking guns, which is especially beneficial in various sealing applications. Additionally, silicone sealants are cost-effective, widely available, and suitable for general sealing tasks. If you have related cooperation needs, welcome to contact OSI!

However, it’s important to note their limitations in adhesive performance; while they excel in sealing, they may not provide the strongest bonds for structural applications.

Advantages of MS Polymer Sealants

What sets MS polymer sealants apart from their silicone counterparts? Their superior performance metrics and application versatility make them a standout choice for many projects. You’ll find that MS polymers offer strong adhesion to various substrates, including metals, plastics, and glass. They accommodate movement and vibration, ensuring durability in dynamic environments. Plus, they’re overpaintable, allowing you to customize the finish without compromising the seal.

With these advantages, MS polymer sealants are increasingly favored in both industrial and consumer applications. Got a big application? Contact us for volume discounts on this or any of our silicone products. We love to help you save!

Disadvantages of Silicone Sealants

While MS polymer sealants boast numerous advantages, it’s important to recognize the limitations of silicone sealants.

One significant drawback is their poor mold resistance, making them less suitable for humid environments where mold growth can compromise integrity.

Additionally, silicone sealants often exhibit weak bonding performance, particularly on non-porous surfaces, limiting their effectiveness in structural applications.

Their hydrophobic nature also prevents overpainting, which can restrict aesthetic options.

Furthermore, while they’re economical, this lower cost is sometimes associated with reduced quality, further impacting performance.

Consequently, when selecting a sealant, you must weigh these disadvantages against your specific application needs, especially if mold resistance and strong adhesive capabilities are critical.

Disadvantages of MS Polymer Sealants

Although MS polymer sealants offer various advantages, they also come with several notable disadvantages that you should consider.

One significant drawback is their higher cost compared to silicone sealants, which can impact budget-sensitive projects. When you conduct a cost comparison, you’ll find that the premium pricing of MS polymers doesn’t always justify their benefits for every application.

Additionally, MS polymer sealants typically have longer curing times, which can delay project timelines. This slower curing process might be unsuitable for situations requiring rapid application and immediate use.

Moreover, they exhibit lower temperature resistance, maxing out at 150°C, limiting their use in high-heat environments.

Consequently, these factors may influence your decision when selecting the appropriate sealant for specific applications.

Key Considerations for Selection

When selecting a sealant, it’s essential to assess the specific requirements of your project to guarantee peak performance.

Start by evaluating material compatibility; verify the chosen sealant adheres well to the surfaces involved. For instance, MS polymers are often favored for their strong adhesion to a variety of substrates, while silicones may not bond effectively to certain materials.

Next, consider the environmental impact—both types have different sustainability profiles. MS polymers tend to have lower VOC emissions compared to silicones, making them a more eco-friendly choice.

Additionally, think about the conditions the sealant will face, such as temperature fluctuations, moisture exposure, and UV radiation, as these factors will influence long-term performance and durability.

If you're dissatisfied with the performance characteristics of your current sealant or are interested in experiencing the benefits of an MS polymer sealant, contact us today.

Frequently Asked Questions

1. Can Silicone Sealants Be Used in Underwater Applications?

Yes, silicone sealants can be used in underwater applications due to their excellent underwater durability and sealant flexibility. However, guarantee proper surface preparation to maximize adhesion and effectiveness in such challenging environments.

2. How Do Temperature Extremes Affect Sealant Performance Over Time?

When facing extreme temperatures, you’ll notice sealant degradation considerably affects performance. If a sealant lacks temperature resistance, it may fail, leading to leaks and expensive repairs. Always choose a sealant suited for your environment.

3. What Is the Shelf Life of Silicone and MS Polymer Sealants?

The shelf life of sealants varies, typically ranging from one to two years. Store them properly, and watch for expiration indicators like changes in color or texture to guarantee peak performance before use.

4. Are There Eco-Friendly Options for Both Sealant Types?

You’ll find eco-friendly options among sealants, with biodegradable choices emerging alongside sustainable sourcing practices. These alternatives offer reduced environmental impact while maintaining performance, so you can make informed decisions for your projects without compromising quality.

5. How Can I Troubleshoot Sealant Adhesion Issues?

To troubleshoot sealant adhesion issues, verify proper surface preparation by cleaning and roughening the substrate. Check substrate compatibility with the sealant to enhance adhesion, preventing failures during application and verifying long-lasting bonds.

Conclusion

At OSi Holding Limited, a leading China company backed by over years of experience in adhesives and tapes, we understand that choosing between silicones and MS polymers is akin to selecting the right tool for a specific task; each has its unique purpose and context. Silicone sealants are celebrated for their affordability and superior high-temperature resistance, while MS polymers stand out for their exceptional adhesion and flexibility.

After reading this article, I believe you have learned the difference between MS Polymer Sealant and silicone sealant and know the advantages of MS Polymer Sealant as well! Which adhesive is best for you? Contact us, and let us know your application and the substrates you’re bonding – and we’ll happily provide our recommendations!