What is the Advantage and Disadvantage of adhesive glue manufacturer

Mar. 03, 2025

The Pros and Cons of Using Structural Adhesives: What You Should ...

Structural adhesives have become an increasingly popular choice for many applications due to their long-lasting strength and versatility. However, you may be wondering whether they are actually worth considering as a joining method.

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Here at Forgeway, we manufacture over tonnes of industrial adhesives. We believe structural adhesives are the best bonding method. But, we know that sounds biased as we manufacture them.

That's why we put our knowledge into this article.

While they have numerous advantages, we aren't blind to the fact that there are several disadvantages to using structural adhesives too. It is important to understand the pros and cons of using structural adhesives to make an informed decision about the best joining method for your project.

This article will provide an overview of the advantages and disadvantages of using structural adhesives, so you can weigh the pros and cons to decide if this joining method is right for your application.

Advantages of using structural adhesives

So you want to assess structural adhesives. But first, why are they becoming so popular? There are several advantages of using structural adhesives.

We have summarised them down to three main advantages; structural adhesives have high strength, they can withstand movements and vibrations, and they are extremely versatile.

Read this section to find out more about these advantages.

Structural adhesives have high strength

One of the main advantages of using structural adhesives is that they offer a high level of strength. In fact, some structural adhesives have such high bond strength, that they offer a very reliable connection between materials that is comparable to that of a weld.

The bond strength of structural adhesives is measured in terms of psi, or pounds per square inch. Here at Forgeway, we assess adhesive strength in terms of MegaPascal, or MPa. 1 MPa is the same as 145 psi.

The strength of an adhesive depends on the type of structural adhesive. For example, Epoxy adhesives are the highest-strength adhesives. Some epoxy adhesives can reach strengths over 60 MPa/ psi (the same as a weld).

So, if you are concerned that structural adhesives are not strong enough, the recent developments in adhesive technology will put your mind at rest. Structural adhesives can rival the strength of a weld.

Structural adhesives can withstand movements and vibration

Another advantage of using structural adhesives is that some adhesive manufacturers have developed formulations to be very durable and withstand movements and vibrations.

This added flexibility may take away some of the strength, but it means that any impact or vibrations don't cause bond failure. As we often tell our customers, flexibility is just as important as strength when it comes to choosing an adhesive.

This ability to withstand vibrations and movement makes structural adhesives suitable for many different types of applications. For example, you want to reduce the noise caused by vibrations on a bus. Or maybe those vibrations are causing the paint to crack (ultimately leading to filiform corrosion).

A flexible adhesive can reduce the vibrations as it absorbs them rather than transferring them onto the substrate. You can reduce (sometimes eliminate) those noise and corrosion problems by having a flexible adhesive.

Structural adhesives are very versatile

The main advantage of using structural adhesives is that they are very versatile. As you might have gathered already, you are almost guaranteed to find a structural adhesive that will meet your needs.

Need a high-strength, fast-curing adhesive that has chemical resistance and impact resistance? We know just the one.

Need a slow-curing adhesive that has lots of flexibility but also good strength and chemical resistance? That option is also available.

Whilst there are limitations (more on that later), there are so many options available. You are highly likely to find a structural adhesive that meets most of your requirements.

Even if you can't find the perfect structural adhesive off the shelf, most adhesive manufacturers can tweak formulations to match your requirements.

Disadvantages of using structural adhesives

Whilst structural adhesives are increasing in popularity, there are some clear drawbacks of using them. There are three main disadvantages of using structural adhesives; The need for adhesives to cure, there are always limitations, and the bonding process can be difficult to understand.

This section goes over those three points in more detail.

Structural adhesives need to cure

One of the main disadvantages of using structural adhesives is that they need time to cure. The exact amount of time varies depending on the type of structural adhesive.

When looking at a structural adhesive's cure time, the most important number to look at is the handling time. This refers to how long it takes the adhesive to reach handling strength (0.4MPa/60psi).

As soon as the adhesive has reached handling strength, you can put it into light operation; knowing it won't come undone. Some structural adhesives can reach handling strength very fast (within fifteen minutes).

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However, it will often take more than 24 hours for an adhesive to reach full cure. This can make it difficult to work with structural adhesives, as you need to plan for enough time to wait for them to cure and reach sufficient strength before you can finish your project.

There are always limitations to look out for

While structural adhesives are very strong, they have their limitations. Some types of structural adhesives are suitable for connecting certain materials, while others are not.

For example, low surface energy (LSE) plastics (like polypropylene) are notoriously difficult to bond. You will need a specialist adhesive or extensive surface treatment before you can create a strong bond to LSE plastics.

You also have to be aware that if you prioritise one characteristic from an adhesive, you may have to sacrifice in other areas. The best example of this is strength and flexibility.

You cannot get a very high-strength adhesive that also has very high flexibility. This means you will need to decide which characteristic is more important from your adhesive.

It is important to understand the limitations of structural adhesives to select the right structural adhesive for your application.

The bonding process can be difficult to understand

While many people use structural adhesives, not everyone knows how they work. Structural adhesives are fairly complicated chemical mixtures. It can be difficult to understand how they work, especially if they are relatively new to you.

So where do you gain knowledge on adhesives and the bonding process?

Thankfully, more and more adhesive manufacturers are starting to share their knowledge on adhesives. Here at Forgeway, we have made it our mission to share our experience and knowledge on adhesives.

We created a guide 'The Fundamentals of Adhesives' to make a complicated subject, easy to understand. If you are looking for information on adhesives and the bonding process, downloading the eBook version is a very good place to start.

However, as more adhesive manufacturers are sharing their knowledge, it is becoming increasingly easier to find the answers to your adhesive questions online.

The other option is to request training from an adhesive manufacturer. Training is the best way to understand a topic and gain internal knowledge.

Are structural adhesives the best choice for your application?

Whilst the question is always difficult to answer, we would say that if you are joining two pieces of material together, a structural adhesive is the best choice.

Nonetheless, this decision comes down to you. It's up to you to decide whether structural adhesives are going to be the best choice. We have given you the information to help you make that decision, now it's up to you.

If you're still unsure, you can look at some of the alternative joining methods like welding or mechanical fasteners. We recommend reading our article about whether you should choose mechanical fasteners or adhesives.

Or, you can get in touch with an adhesive expert who will help you make the decision. A member of our team would be glad to help you decide whether structural adhesives are the best choice for your application.

If you have seen enough and want to know more about structural adhesives, it's time to look at the different types of structural adhesives in more detail. You now need to decide which type could be the perfect match.

Epoxy adhesives and methyl methacrylate adhesives are the two most common structural adhesives. We recommend exploring those two options further.

Adhesive Bonding for Structural Joints: Pros and Cons - LinkedIn

One of the main benefits of adhesive bonding is that it can join dissimilar materials, such as metals, plastics, composites, and ceramics, without affecting their properties or causing thermal distortion. This allows for more design flexibility and weight reduction, especially in applications where high strength-to-weight ratio is required. Another benefit of adhesive bonding is that it can distribute the load evenly across the joint area, reducing stress concentration and improving fatigue resistance. Moreover, adhesive bonding can seal the joint from moisture, corrosion, and noise, enhancing the durability and performance of the structure.

Advantage: - They offer a high level of strength. - Some adhesive manufacturers have developed formulations to be very durable and withstand movements and vibrations. - They are very versatile. Disadvantages: - They need time to cure. The exact amount of time varies depending on the type of structural adhesive. - While structural adhesives are very strong, they have their limitations. Some types of structural adhesives are suitable for connecting certain materials, while others are not. - Structural adhesives are fairly complicated chemical mixtures. It can be difficult to understand how they work, especially if they are relatively new.

However, adhesive bonding also has some drawbacks that need to be considered before choosing it as a structural joining method. One of the main drawbacks is that it requires careful surface preparation and quality control to ensure a strong and reliable bond. The surfaces must be clean, dry, and free of contaminants, and the adhesive must be applied and cured according to the manufacturer's instructions. Any deviation from the optimal conditions can compromise the bond strength and integrity. Another drawback of adhesive bonding is that it can be affected by environmental factors, such as temperature, humidity, UV radiation, and chemical exposure, which can degrade the adhesive over time and cause joint failure. Furthermore, adhesive bonding can be difficult to inspect, test, and repair, as the bond line is usually hidden and inaccessible.

Depending on the requirements and specifications of the project, there may be other options for creating structural joints and connections besides adhesive bonding. Some of the common alternatives are mechanical fastening, welding, and brazing. Mechanical fastening involves using bolts, screws, rivets, or pins to join two or more materials. It is a simple and fast method that can be easily adjusted and removed, but it also introduces holes and discontinuities in the structure, which can reduce the strength and stiffness and increase the weight and drag. Welding involves using heat and pressure to fuse two or more materials together. It is a permanent and strong method that can handle high loads and temperatures, but it also requires high skill and equipment and can cause distortion and residual stress in the structure. Brazing involves using a filler metal to join two or more materials at a lower temperature than welding. It is a versatile and economical method that can join dissimilar materials and complex shapes, but it also requires flux and cleaning and can weaken the base materials and create brittle joints.

Plastic welding is a popular alternative to adhesive bonding that produces more durable, reliable, and cost-effective assemblies. Welding has several advantages over adhesive bonding. Welding creates a stronger bond by melting the plastic together rather than just relying on surface adhesion. This makes it perfect for applications where durability and strength are important. Welding is more scalable than adhesive bonding, meaning it can handle increased production quantities without compromising quality. Welding provides a cleaner and more seamless finish, as there is no excess glue or adhesive residue left behind. Welding has lower production costs and take less time than it does to apply, clamp, and cure glue in an assembly.

The best method for creating structural joints and connections depends on various factors, such as the type and size of the materials, the design and function of the structure, the loading and environmental conditions, the cost and availability of the resources, and the standards and regulations of the industry. Each method has its own advantages and disadvantages, and there is no one-size-fits-all solution. Therefore, it is important to evaluate the pros and cons of each method and compare them to the specific needs and goals of the project. A thorough analysis and testing of the joint performance and failure modes can help to select the most suitable and reliable method.

Some adhesives have limited temperature resistance, making them unsuitable for high-temperature applications. Engineers must select adhesives based on the expected temperature conditions. In a project involving industrial ovens, we had to avoid adhesive bonding due to high operating temperatures. Adhesives allow for more creative and flexible designs as they can bond dissimilar materials and create smooth transitions. Ideal for innovative architectural structures. In an art installation project, adhesive bonding enabled the creation of unique shapes and connections. Ensuring consistent adhesive quality and proper application can be challenging. Variability can lead to unreliable joints.

Taking the example of glass structures, the architectural and structural goals are of maximum transparency, and if it's a façade, it's also important to provide enclosure. This often requires careful consideration of the engineer when designing adhesive joints, taking into consideration the following: 1- Situations often combine high UV incidence with high temperature and humidity differences among the connected members 2- Simplified risk assessments may be performed taking into account human, material and financial damages and losses to support safe design decisions and assessments 3- Consider the execution capabilities of contractors, as adhesive joints require expertise on the behavior and adequate conditions for safe bonding

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