MMA Adhesives Vs. Epoxy: What to Choose & Why?

There are so many different types of adhesives out there that finding the right one for your needs can be challenging and even overwhelming. Fortunately, we are here to help clear up some of the confusion surrounding epoxy and methyl methacrylate adhesives (MMAs) or acrylics.  

Methyl Methacrylate Adhesives Vs. Epoxy 

While both are types of adhesives, MMA adhesives and epoxy have some important differences that you should be aware of. Once you have a better understanding of these differences, you will have a better idea of their pros and cons as well as which type of adhesive is best for your specific needs. 


rivets and welding

Methyl methacrylate adhesives (MMAs) also sometimes called acrylics are a strong type of structural adhesive used in various commercial and industrial manufacturing. They are two-part adhesives that are mixed together and can act as a faster alternative to welding or rivets. Unlike many other types of adhesives, MMAs require little surface preparation so they can be applied to dirtier or oilier surfaces and still maintain a strong, lasting bond. They also do not need heat to cure.  


Epoxy adhesives are another type of structural adhesive, but they are primarily made of epoxy resin and a curing agent like amine. They have a high heat and chemical resistance. As a result of their durability, they are frequently used for a variety of commercial purposes. 

What is the Difference Between Epoxy and MMA Adhesives? 

Epoxy and MMA adhesives do have many similarities. Both are high-strength structural adhesives. Both also have several applications in various industries. Although there are some general similarities, the two adhesive groups also have some unique features. When comparing MMA acrylic adhesives versus epoxy, it is important to note their differences in the following: 

  • Raw materials  
  • Strength 
  • Surface preparation 
  • Cure time 
  • Chemical and heat resistance 

Raw Materials  

Perhaps one of the biggest differences between epoxy versus MMA adhesives is their composition. The raw materials in MMAs include acrylic resin, a hardener, rubber, and other strengthening agents. On the other hand, epoxy adhesives are made of epoxy resin and a curing agent as their raw materials.  


Both structural adhesives, MMA adhesives and epoxy can create a bond strength of 1000 psi or higher. While both adhesives are often considered to create permanent bonds, epoxy can be designed to achieve higher strengths than MMAs.  

Surface Preparation 

When comparing epoxy and MMA adhesives, it is also important to note the differences in their necessary surface preparation for adhesive bonding. While MMAs can be applied to oily or dirty surfaces without a lot of cleaning beforehand, epoxy adhesives typically require more surface preparation. Without the proper prep, the bond may not achieve full strength or may not hold.  

Cure Time 

Cure time is the amount of time it takes for an adhesive to reach maximum hardness and protection. MMAs tend to have short cure times of just a few minutes or sometimes a few hours. In contrast, epoxies tend to have longer cure times with an average closer to that of seven days.  

Chemical and Heat Resistance 

Another aspect to take note of between methyl methacrylate versus epoxy adhesives is the difference in their chemical and heat-resistance properties. Epoxy adhesives have a higher chemical and higher heat resistance than MMAs. As a result, they can generally be exposed to environments with more chemicals and higher temperatures than MMAs while still keeping their bond.  

When to Use MMA Adhesives vs. Epoxy 

adhesive applied to boat

Both of these adhesives can bond various materials such as wood, metals, and plastics. Because they are both so versatile, they are used in several different industries. Depending on the specific product, they can be used as aviation, electronic, automotive, and marine adhesives 

Although their applications may overlap, MMAs and epoxy adhesives also have some different uses based on their different properties. When comparing epoxy and MMAs, it is important to consider these differences to ensure you choose the right product and the bonds will last. MMA adhesives are better suited for processes with shorter cure times, but epoxy would be better for dealing with more extreme temperatures.  

Not only are MMA adhesives and epoxy different from each other, but also there are different variations of each. MMA adhesives can vary in their cure times, strength, viscosity, and the materials they are best suited for. For example, Infinity Bond MMA 300 is a popular all-purpose MMA. It has a high strength as well as great impact resistance. On the other hand, Infinity Bond MMA 500 has the unique feature of being able to bond with difficult plastics like polyethylene (PE) and polypropylene (PP). 

Like MMAs, epoxy adhesives also include a wide spectrum of products. The 3M Scotch-Weld DP270 can be used for electrical applications. It is UL94 rated and is also non-corrosive with copper. In contrast, the 3M Scotch-Weld DP420 is meant for more general use. It is weather resistant and good for environments that will experience heavy wear and tear.  

Now that you have a better understanding of the differences between mma adhesives versus epoxy adhesives, you may have a good idea of which one is right for you based on your materials, strength, cure time, and environment. If you need more assistance, we are here to help. Contact one of our experts, and they will work with you to determine the best product for your specific needs.  

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