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Opti-tec 5020

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Clear Epoxy Potting Compound
Optical Epoxy Encapsulant

  • Clear
  • Low viscosity
  • Low stress
  • Room or low temperature cure
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Opti-tec 5020 is a clear, two component, low viscosity epoxy which will cure in thick sections at room temperature. In thin section, it is clear and transparent. In thicker sections, it can take a yellow or straw tint. Opti-tec 5020 is designed for potting and encapsulation of components where optical clarity, good wetting and low viscosity are important.

Opti-tec 5020-B is a black version with similar properties.


  • Potting or encapsulation
  • Encapsulation of larger components
  • Optical assembly, optical filters, LEDs
  • Optoelectronics
  • Void filling in cables


  • OPT 5020 is a clear adhesive with a viscosity of 1000 cps.
  • OPT 5020 has the resiliency to cope with internal stresses of larger encapsulations. It has a relatively low level of exotherm during cure, and so is safe to use with delicate components.
  • OPT 5020 has about a one hour pot life after mixing and cures within 24 hours at room temperature in thick sections.
  • OPT 5020 has low viscosity allowing it to fill voids without air entrapment.
  • OPT 5020 cures to a high gloss finish, even under high humidity.
Typical Properties
Mix ratio 2:1 resin to hardener
Mixed viscosity 1 Pa.s (1000 cps) @ 25°C
Colour Clear/straw
Density 1.15
Pot life 75 minutes @ 25°C
Cure schedule
Bondline temperature Time
25°C 24 hours
Rate of cure will depend on temperature and volume. Thin films will take 2-3 days at a similar temperature.
60°C 4 hours
Cured properties
Hardness, Shore D 60
Temperature range -55 to 115°C
Tensile strength 50 MPa
Dielectric strength 13 kV/mm
Dielectric constant 4
Volume resistivity 1014 ohm.m
Shelf life 12 months in original sealed containers

Opti-tec 5020 is available in twinpacks or in bulk.

Twinpack  Twinpack instructions

The twinpack sachet is a clear film sachet, with the resin and hardener separated by a removable clip and rail divider. To mix the adhesive, remove the divider and mix the two parts together within the sachet. The two parts are mixed until they appear uniform, which usually takes about 1 to 2 minutes. Cut off one corner of the sachet, and dispense to required area, or to syringe for more precise application.

Standard twinpack size is 100g total weight.

Part number Description
OPT5020-100G Clear Epoxy Potting Compound - 100g twinpack sachet
OPT5020-750G Clear Epoxy Potting Compound - 750g kit
OPT5020-B-100G Black Epoxy Potting Compound - 100g twinpack sachet
OPT5020-B-750G Black Epoxy Potting Compound - 750g kit

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June 2016
Version 4.3

Intertronics Logo

17 Station Field Industrial Estate, Banbury Road
t +44 1865 842842  e info@intertronics.co.uk
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.
© INTERTRONICS 1997, 2016