Troubleshooting Problems with MMA Marine Adhesives

No adhesive is perfect. Even if it is the best type of product for the job, sometimes users errors in the application can occur or there is a better product for the specific job. Fortunately, a small change in the application process or switching the product that is used can fix most of these issues. 

MMAs in the Marine Industry  

The marine industry requires the use of adhesives in various fashions and with various specifications. Methyl methacrylate adhesives or MMAs are a common type of product used in the marine industry because of their strong structural bonds and versatility. Many have high fatigue, chemical, and weather resistance. They also come with a variety of open times to fit the needs of various production processes with little to no surface preparation required. Altogether, MMAs are often the best product for the job when it comes to structural bonding on boats. 

Solutions for MMA Marine Adhesive Issues 

While these products come with a number of great benefits, problems with methyl methacrylate adhesives in the marine industry can arise from time to time. Fortunately, most are easily fixed. To help, we are sharing some potential MMA marine adhesives problems and how to solve them.  

Issue: Clogged Nozzle  

A potential downfall with marine MMA adhesives is that they can react in the nozzle and cause clogging. Luckily, you can avoid this issue in most cases. Use a pneumatic cartridge gun that allows for faster dispensing. You can also try a product with a longer working time. We recommend products like Infinity Bond MMA 300, Infinity Bond MMA 310, or Infinity Bond MMA 330. 

Issue: Excessive Curing Time 

Another potential issue with MMA adhesives in the marine industry is excessive cure time. Excessive curing time of marine adhesives can occur sometimes because of improper mixing. If you notice striations in the final mix, then your glue mixing nozzle may need to be upgraded to ensure you are getting the proper mix ratio. 

Issue:  Sagging or Slumping 

Sagging or slumping in marine adhesives can be another problem. Functionally, everything is usually fine, but the final look is not as nice. While gravity is unavoidable, you can use a thixotropic or non-sag formulation that is specifically designed to stay in place without running. One such product with this property is Infinity Bond MMA 2245 

Issue: Distortion or Bleed Through 

One potential challenge with marine MMA adhesives is that some may cause distortion or bleed through. This can lead to a less visually appealing finished product. Fortunately, you can often minimize distortion and bleed through in marine adhesives with a few simple tweaks. First, try not to put too much adhesive in one spot as this can increase the chances of this problem. Second, use a product that is low exothermic such as Infinity Bond MMA 230-40HV or Infinity Bond MMA 230-60HV. 

Issue: Poor Adhesion 

The last thing any manufacturer wants for any bond is poor adhesion. To reduce the chances of poor adhesion with MMA marine adhesives, be sure to follow the proper instructions on surface preparation. 

One benefit to MMAs is that they do not need as extensive prep as other adhesives, but you should still make sure the substrates are free of contaminants and fully dry before application. Use clamps when recommended. If you are still having problems, check that your mix ratio is correct, you are following recommended curing procedures, and you are storing the adhesive properly before use. 

While MMAs are often the best choice for the marine industry, sometimes issues can arise. If you are running into MMA marine adhesive problems that you are not sure how to fix, we may be able to help. Contact us today to connect with an adhesive expert who can offer you solutions on products, production, and more.  

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