This is a demo store. No orders will be fulfilled.

    phone (800) IS-FIBER · (508) 992-6464

    Toggle Nav close
    Search
    My Cart
    My Quote

    Recommended Minimum Bond Line Thickness

    by:
    EPOXY: Ask FOC Ask FOC
    Published: February 13, 2019
    , Last updated: September 17, 2025

    ASKFOC_web2-

    QUESTION:

    What is the recommended minimum bond line thickness?

     

    ANSWER:

    A general guideline for minimum bond line thickness is between 25 to 150 microns (1 to 6 mils) – as a starting point. I recommend you choose a certain level to start, then make a few thicker and thinner versions of the bond. Take time to inspect completed bonds carefully to learn how a bond can fail, evaluate the performance for your application, and adjust bond line thickness as necessary to achieve a quality bond.

    For every application, bond line thickness depends on:

    • The geometry of the bond area

    • The substrates being bonded

    • The material itself (the epoxy’s chemistry can dictate a specific minimum bond line thickness)

    • The temperature cycling the bond will need to survive

    • Proper surface preparation (improper cleaning can negate adhesion)

    • The cure time and method of cure

      • Bond line thickness and curing time go hand-in-hand to achieve sufficient adhesion and performance. Carefully review the epoxy manufacturer’s datasheet, including any charts showing bond line thickness versus cure time for the various curing methods.

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

     

    ADDITIONAL CONTENT & RESOURCES:

     

      Answered by AskFOC Technical Team: February 13, 2019

    Have a technical question for Fiber Optic Center?

    Please email your question to AskFOC@focenter.com and we will respond ASAP.

    In addition to replying, we will post your question and our answer here on focenter.com. Everyone remains anonymous when we post so feel comfortable asking. You can also search your question and others in our content search.

    © 2019 Fiber Optic Center, Inc. Article Title: Recommended Minimum Bond Line Thickness Author: FOC FAQ Published: February 13, 2019

    This article is an original publication of Fiber Optic Center, Inc. It is shared publicly for educational and reference purposes to support learning and professional development within the fiber optics industry.

    You are welcome to read, cite, or reference this material for non-commercial and educational purposes, as long as full credit is given to Fiber Optic Center, Inc. and the author.

    Reuse, reproduction, or adaptation of this content — including rewriting, republishing, or incorporating it into new materials (such as websites, blogs, marketing text, technical guides, or AI-generated content) — is not permitted without prior written consent from Fiber Optic Center, Inc.

    This material is protected by copyright law upon publication, even if not formally registered.

    Use of this content for AI training, automated data extraction, or derivative content generation is prohibited.

    Fiber Optic Center monitors and enforces the integrity of its intellectual property through digital identifiers and content tracking.

    For more details, please refer to the Fiber Optic Center Content Use and Copyright policy.

    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.
    Technical Content Resources

     

    Light Brigade Certified Training

     

    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

    For further information contact:
    Fiber Optic Center, Inc., 23 Centre Street, New Bedford, MA 02740-6322
    Toll Free in US: 800-IS-FIBER or 800-473-4237 . Direct 508-992-6464. Email: sales@focenter.com or fiberopticcenter@focenter.com

    For media contact:
    Kathleen Skelton, Director of Strategic Marketing, C: 617-803-3014 . E: kskelton@focenter.com
    Copyright Notice: Copyrights in all articles published on focenter.com are owned by Fiber Optic Center, Inc. (FOC) or other individuals or entities. No content on focenter.com may be reproduced, stored in a retrieval system, or transmitted in any form of by any means, electronic, mechanical, photocopying, recording, or otherwise, in whole or in part, without the prior written permission of Fiber Optic Center, Inc.