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EPOXY: Ask FOC

Epoxies and How to Use Small Quantities Without Wasting

QUESTION: We are getting epoxy 353nd from you in a package of 2gr. Is it the minimum package? We are concerned about wasting material because we are using 353nd only for MTP assembly. Do you have any suggestions to reduce waste?     ANSWER: It is not...
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Large Epoxy Ring With Visual Inspection

QUESTION: I am noticing a large epoxy ring with visual inspection. Can you help me understand what I am looking at?   ANSWER:  Occasionally we receive visual inspection pictures from multimode connectors that shows an evident rough epoxy ring around...
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Epoxy That Is Irregular, Curing Differently, Has Different Color

QUESTION: My epoxy is ‘behaving irregularly’, curing differently, has a different color, etc. Can you help?   ANSWER: It is possible for a batch of epoxy to be faulty, but it is very rare. Most likely you are experiencing some variation in the epoxy that...
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Epoxy and Expiration

QUESTION: My epoxy is past expiration. Can I use it?   ANSWER: Once the epoxy is past expiration, FOC does not recommend using it without testing the material. You can cure it and if it sets as expected, it can be used. However, the hard part will be...
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Determining Correct Epoxy for an Application

QUESTION: What info is needed to determine the correct epoxy for an application?   ANSWER: Here is a list of questions we will need answered: Can you tell me something about your application? What substrates are to be bonded? What is the main...
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Crystals in Epoxy, Why?

QUESTION: Why does my epoxy have crystals in it?   ANSWER: Crystallization of liquid epoxy is a known phenomenon that frequently surprises users who are not very familiar with epoxies. Crystallization may look like crystals, snowflakes, cloudiness, fog,...
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