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    If the Epoxy Has Filler or Glass Beads, Will That Interfere With the Strength of the Bond – And Create the Need for a Thicker Bond Line?

    by:
    EPOXY: Ask FOC Ask FOC
    Published: January 18, 2019
    , Last updated: September 18, 2025

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    QUESTION:

    If the epoxy has filler or glass beads, will that interfere with the strength of the bond – and create the need for a thicker bond line?

     

    ANSWER:

    If an epoxy has a filler or glass beads, the manufacturer has included the filler for a reason. The filler is part of the material’s properties – a component of the whole mixture – that contributes to achieving the adhesion and performance listed on the datasheet. Theoretically, there could be reduced strength if the dimension of the filler approaches the thickness of the bond line. Most fillers are much smaller than 1 mil (25 microns) and should be no cause for concern. However, you should always test the bond lines as described above to have confidence the adhered joint achieves the strength and stability needed for the application.

    READ THE FULL BLOG ARTICLE HERE: Bond Line Thickness & More: Answers to Common Epoxy Questions

     

    ADDITIONAL CONTENT & RESOURCES:

     

      Answered by AskFOC Technical Team: January 8, 2019

     

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    © 2019 Fiber Optic Center, Inc. Article Title: If the Epoxy Has Filler or Glass Beads, Will That Interfere With the Strength of the Bond – And Create the Need for a Thicker Bond Line? Author: FOC FAQ Published: January 18, 2019

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    About the Author
    FOC FAQ Fiber Optic Center has a team of technical experts and marketing strategists with decades of years in the field. This team contributes to the fiber, cable and specialty industries coverage through news, alerts, reports and general media information.
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    About Fiber Optic Center, Inc.
    Fiber Optic Center, Inc., (FOC), is an international leader in distributing fiber optic components, equipment and supplies and has been helping customers make the best cable assemblies in the world for over two decades. Several areas of specialization and expertise, in which they are the industry leader, make them the preferred choice for many of the world’s fiber professionals. In these key technology areas, FOC is "at least as technical as the manufacturer" about the products they sell. Striving to "make the business part easy," they offer outstanding and personal customer service, low or no minimum purchase order values, and from-stock delivery on industry-leading products and technology. FOC is the industry connection to the most innovative optical products, technologies and technical experts who integrate their manufacturing knowledge and vast experience into customers' worldwide operations. @FiberOpticCntr

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