Upcoming Light Brigade Training Courses in New Bedford include: Fiber Optics 1-2-3, Fiber Optics for Data Centers, Splicing Deep Dive and more. View More Details.

!! We are experiencing a phone outage at Fiber Optic Center today, June 2, 2026 !!
Please send any requests via email and we will respond as soon as possible.

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

    Toggle Nav
    My Cart
    My Quote
    close
    Search
    main product photo

    EPO-TEK® 353ND High Temperature Black Epoxy, Heat Cure (4g)

    ET353NDBLK-4G

    EPO-TEK® 353ND Black Heat Cure, 2-Part Epoxy, 4 Gram Packet
    - +
    View Quote Request Learn About Our Quote Tool
    The EPO-TEK® 353ND Black Epoxy is a two-component, high-temperature epoxy designed for semiconductor, hybrid, fiber optic, and medical applications. 4g packet.

    Features:
    • Has been color-coded black for optical applications requiring opacity against light in IR and VIS region.
    • Pot Life: < 2 hours
    • Recommended Cure: 150°C / 1 Hour
    Physical Properties:
    • Consistency: Pourable liquid
    • Viscosity (23°C) @ 100 rpm: 3,000-5,000 cPs
    • Glass Transition Temperature, Tg: ≥ 90°C (degree Celsius); ≥ 194°F (degree Fahrenheit)
    • Shore D Hardness: 85
    • Coefficient of Thermal Expansion (CTE):
      • Below Tg: 54 x 10-6 in/in°C
      • Above Tg: 206 x 10-6 in/in°C
    • Suggested Operating Temperature: < 325 °C (Intermittent); < 617°F  
    Optical Properties:
    • Spectral Transmission: < 3% @ 1500 nm
    See Datasheet for additional properties and application notes

    Datasheet

    SDS (Part A)

    SDS (Part B)

    Mixing Instructions

    Technical Support

    A purchase from Fiber Optic Center includes access to a team of experienced technical experts with hands-on industry experience. From on-site support and training to troubleshooting, process development, yield improvement, evaluations, and calibrations, we provide the practical guidance and expertise needed to help you maximize productivity and achieve exceptional results. Click here for more details on the technical advantage of Fiber Optic Center.

    Fiber Optic Center

    4.9 71 Google reviews

    Represents overall Google Reviews of Fiber Optic Center, Inc.

    Content Use Notice:

    This product detail page and its content are the property of Fiber Optic Center, Inc. and are provided for informational and evaluation purposes.

    You may view or reference this page for non-commercial use with proper attribution. Copying, rewriting, republishing, scraping, or using this content to produce new or modified content, including AI-generated content, is not permitted without written permission.

    This content is protected by copyright law upon publication. Learn more