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Opti-tec™ 5054 high temperature epoxy adhesive is a two component, low viscosity, heat curing epoxy. It is formulated for very high temperature resistance and can operate up to 350°C for short periods. Its structure gives the material outstanding environmental resistance including super heated steam at 135°C. Opti-tec 5054 finds applications in fibre optic terminations where superior thermal and environmental resistance is required. It has passed ISO 10993-5 for medical device applications.

Opti-tec 5054 has a thixotropic, high viscosity version – Opti-tec 5054-T.


Fibre Optic Termination

Features & Benefits

  • Can withstand high temperature steam autoclaving and operate for short periods up to 350°C
  • Very long pot life of 12 hours after mixing
  • High surface energy low viscosity allows it to readily wet and wick between optical fibres
  • Strong adhesion to most materials used in fibre optics and optics, including metals, ceramics, glass and most plastics
  • Low shrinkage on cure, reducing internal stresses within the bond. It is therefore suitable for multiple fibre assemblies.
  • Excellent impact and thermal shock resistance, with low internal stresses
  • High glass transition temperature – excellent high temperature performance and creep resistance
  • Very high resistance to moisture, vapours and most chemicals
  • Low outgassing and low vapour pressure, making it an ideal sealing material for electronic and optical applications
  • Used for Telcordia GR-326-CORE compliant assemblies (General Requirements for Singlemode Optical Connectors and Jumper Assemblies – formerly Bellcore), where its high Tg and environmental robustness allow the termination to meet the specification. Note: optimal cure schedule required.
  • When cured, is considered non-cytotoxic and meets the requirements of the Elution Test, ISO 10993-5. Further ISO 10993 and USP Class VI qualification pending.


  1. Fibre optic terminating
  2. Endoscope manufacture and repair
  3. Optoelectronics
  4. High temperature, high performance bonding
  5. Electronic sealing
  6. Medical devices and instruments
  7. Unitising voice coils


Typical Properties
Mix ratio 100:85 resin to hardener
Mixed viscosity 500 – 1000 cps
Colour Amber
Surface tension 40-44 mN/m
Pot life 12 hours @ 23°C
Cure schedule Bondline temperature
30 minutes
5-10 minutes
Note: Optimal cured properties are achieved by curing for 5 minutes at a bondline temperature of 150°C. Whilst lower cure temperatures are quoted, they are not recommended for best performance.
Cured properties
(5 minutes @ 150°C)
Glass transition temperature (Tg) >140°C
Density 1.20
Hardness, Shore D 92
Temperature range -60 to 250°C
Modulus 2 GPa
Shrinkage on cure <3.5%
CTE 55 ppm/°C
Lap shear (Al/Al) 11 MPa (@ 23°C)
Shelf life 12 months in original sealed containers
Lap shear OPT 5054
Lap shear results for Opti-tec 5054
Lap shear graph OPT 5054
Lap shear results for Opti-tec 5054

Other Information

See how OPT 5054 works as part of a real application in this Adhesive Case Study:

Case Study Opti-tec 5054 Speaker Coils web Using Opti-tec 5054 to aid in high power and high performance speaker coil assembly processes

Speaker coil assembly required a low viscosity adhesive with resistance to high temperatures and extended pot life.


Ordering Information

OPT 5054 is available in twinpacks or in bulk.

Twinpack packaging Twinpack packaging instructions

The twinpack sachet is a clear film sachet, with the resin and hardener separated by a removable clip and rail divider. Click here for twinpack mixing instructions.

Standard twinpack size is 4g total weight. Opti-tec 5054 twinpack sachets are packaged in quantities of 5, sealed into a protective aluminium foil pouch.

Part number Description
OPT5054-4G 5 x 4 twinpack sachets
OPT5054-500G 500g kit

All Downloads

Filename Size Download
Twinpack Mixing Instructions 0.28MB
How Much Adhesive Will I need? 0.12MB
Using Opti-tec 5054 to aid in high power and high performance speaker coil assembly processes 1.10MB
  • Last updated: May 2017
  • Version: 6.0

Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in any manner as warrantees expressed or implied. The user shall determine the suitability of the product for his intended use and the user assumes all risk and liability whatsoever in connection therewith.