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Crystals in Epoxy and What It Means

Published: April 1, 2019
, Last updated: September 18, 2025

QUESTION:

I found crystals in our epoxy. Does this mean it has gone bad?

 

ANSWER:

Crystallization in epoxies can look like salt granules in an otherwise clear liquid. Or the epoxy may look foggy, milky, or grainy. Or it may have solidified. Rest assured, the material has not “gone bad.” Crystallization in epoxies is a common occurrence. It happens because the liquid resin is fighting to return to its natural state, which is a solid form. Once the epoxy has crystallized, it IS usable. You just need to heat-treat the material and return it to the clear liquid state.

Read my article to learn how.

READ THIS FULL BLOG ARTICLE HERE:  Helpful Epoxy Tips (and a Few Tricks)

 

ADDITIONAL CONTENT & RESOURCES:

 

  Answered by AskFOC Technical Team: April 1, 2019

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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.
About Fiber Optic Center, Inc.
Fiber Optic Center, Inc., (FOC), is an international leader in distributing fiber optic components, equipment, materials, and supplies known for helping customers make the best cable assemblies in the world for over three decades. Material property consultation is provided by technical experts for lapping film, epoxy, adhesives, optical coatings, and optical plastics during application specific material selection. Technical process expertise is offered in several key technology areas. Specialized expertise includes cable assembly line mastery, fiber broadband field installation best practices, and technical advancements in telecom, datacom, data centers, and hyperscale. Optical cable specification development includes design and quality testing. FOC's impact reaches the network physical capabilities through fiber manufacturing process expertise from preform fabrication and shaping, fiber drawing, and coating requirements for double clad fibers used for high power fiber laser applications to solution doping, vapor phase doping, rare earth chelates and halide recipe consultation. Fiber Optic Center is the preferred choice for the world’s fiber professionals as 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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