Silicone isn’t the only type of sealant you can use. There are so many different types of sealant, but most companies seem to think that silicone is the only sealant out there. If this sounds like you, don’t worry.
Here at Forgeway, we manufacture over 3000 tonnes of adhesives and sealants annually. We don’t manufacture silicone sealants though. Companies often come to us when they want a silicone sealant alternative.
In our opinion, the best silicone sealant alternative is to use an MS polymer sealant. However, we know a few other options too that may suit your application better.
With our years of industry experience, we know the alternative sealant options, and we want to educate you. This article will detail the other sealant options and will help you establish what makes a good sealant product. By the end of the article, you will have a good idea about which sealant product you want to explore further.
You may have come to this article looking for an alternative sealant for several reasons. However, there are a few common reasons why companies look for a silicone sealant alternative.
Or there may be a completely different reason why you are looking for a silicone sealant alternative. Ultimately you want a sealant that suits your needs.
When it comes to choosing a suitable sealant, you will have a few characteristics in mind that are important to you. But what other qualities should a sealant have?
There are some characteristics that a sealant must have. There are also some characteristics that a good sealant should have. So we split this section into two parts.
MS polymer sealants are the most common hybrid polymer sealants. They tend to have greater tensile strength than silicones. You also don’t need to worry about struggling to overpaint MS polymer sealants.
But where MS polymers tend to stand out is their strength and weathering performance. They can achieve high strengths that silicones cannot reach. They also don’t need a primer to reach those high strengths like polyurethane sealants.
MS polymer sealants combine the weathering performance of silicones with the strong performance of polyurethanes.
However, they tend to be more difficult to work with than silicones as they are usually thick. This means they are often more difficult to gun out. However, most people can overcome this issue by using an applicator that is better suited for viscous sealants.
Polyurethane sealants are often the go-to sealants for applications where you need a sealant with good strength. They can achieve similar strengths to MS polymer sealants.
A high-quality polyurethane sealant (much like MS polymer sealants) will not cause the staining that silicones tend to cause. They also can achieve very clear and transparent finishes like silicones. MS polymers struggle to achieve this clear finish.
Nonetheless, companies tend to stay away from polyurethanes for health reasons. This is because they contain isocyanates. Isocyanates are highly irritant. They can cause health problems to the operators who use polyurethane sealants.
Isocyanates have also faced fresh scrutiny from REACH. You will need to comply with restrictions before you can use polyurethane sealants.
The other reason companies stay away from polyurethanes is the weathering resistance. Polyurethanes cannot achieve the same levels of weathering resistance as silicones or MS polymers.
Now that you have learned about the silicone sealant alternatives, you will want to decide which sealant you can use instead of silicone. You may have determined that silicone is still the best sealant for your application.
But you read this article because you have been experiencing a problem with your silicone sealant. Whatever the problem is, you need to solve it.
Here at Forgeway, we manufacture a range of sealants for different applications. However, we don’t manufacture silicone sealants. Customers often ask us “what is the best silicone sealant alternative.” We would always say that MS polymer sealants are the best alternative to silicones.
MS polymers and polyurethanes are the two best silicone sealant alternatives. They are very similar to silicone and in most cases, they have higher performance than silicone sealants.
MS polymers are likely the best option for you if you are looking for a sealant that has:
However, if you want that same strength but need the sealant to have a clear finish, you will want to look into exploring polyurethane sealants.
You should have a good idea about which sealant is best for your application. Nonetheless, we know it is still difficult to know which sealant is best for you.
We are here to help if you still can’t decide for yourself. Click on the banner below if you would like some help choosing a silicone sealant alternative.