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EPO-TEK OG116-31
Technical Data Sheet
For Reference Only
UV Cure Optical Epoxy
Date: July 2019
No. of Components:
Mix Ratio by Weight:
Specific Gravity:
Pot Life:
Shelf Life- Bulk:
Shelf Life- Syringe:

Rev: IX
Single
N/A
1.20
N/A
One year at room temperature
Six months at -40°C

Recommended CureIron-Doped Mercury Flood Lamp > 30 sec.
100 mW/cm 2 @ 240-365 nm
Alternative Cures*
Iron-Doped Mercury Spot Lamp
365nm LED Flood Lamp
Pulsed Mercury Lamp

> 5 min.
> 2.5 min.
> 60 sec.

UV Cure is complete after 24 hours fromUV Exposure* Contact Technical Services for applicationspecific variations

NOTES:● Container(s) should be kept closed when not in use.
● Filled systems should be stirred thoroughly before mixing and prior to use.
● Performance properties (rheology, conductivity, others) of the Products may vary from those stated on the data sheet when bi-pak/syringe packaging or postprocessing of any kind is performed. Epoxy’s warranties shall not apply to any products that have been reprocessed or repackaged from Epoxy’s delivered
status/container into any other containers of any kind, including but not limited to syringes, bi-paks, cartridges, pouches, tubes, capsules, films or otherpackages.
● Thermal post-cure beneficial - contact techserv@epotek.com for recommendations.

Product Description: EPO-TEK® OG116-31 is a single component, UV curable epoxy adhesive and encapsulant, designed for PCB
and circuit assembly applications found in semiconductor, computer, medical, and scientific/OEM industries.
Typical Properties: Cure condition: Varies as required.
*denotes test on lot acceptance basis Data below is not guaranteed.
be used as a guide only, not as a specification. Different batches, conditions & applications yield differing results.

ToPHYSICAL PROPERTIES:* Color (before cure):* Consistency:* Viscosity (23°C) @ 10 rpm:
Thixotropic Index:* Glass Transition Temp:
Coefficient of Thermal Expansion (CTE):
Below Tg:
Above Tg:
Shore D Hardness:
Die Shear:
UV CureUV Cure + 23°C/24 HoursUV Cure + 80°C/1 Hour
Degradation Temp:
Weight Loss:@ 200°C@ 250°C@ 300°C
Suggested Operating Temperature:
Storage Modulus:* Particle Size:
OPTICAL PROPERTIES @ 23°C:
Spectral Transmission:
Refractive Index (uncured):
Refractive Index (cured):Cloudy White
Viscous Liquid
20,000-30,000 cPs
1.3≥115 °C (Dynamic Cure:20-200°C/ISO 25 Min; Ramp -10-200°C @ 20°C/Min)
41 x 10-6 in/in°C
170 x 10-6 in/in°C
83
psi≥10 Kg3,556
27.8 Kg
9,885.7 psi
27.1 Kg
9,636.8 psi
409 °C
0.30 %
0.68 %
1.18 %< 300 °C (Intermittent)
263,581 psi≤ 20 microns≥ 96% @ 660-1,640 nm≥ 92% @ 500 nm
1.5665 @ 589 nm
1.5842 @ 589 nm

Epoxies and Adhesives for Demanding Applications™
This information is based on data and tests believed to be accurate. Epoxy Technology, Inc. makes no warranties (expressed or implied) as to its
accuracy and assumes no liability in connection with any use of this product.

EPOXY TECHNOLOGY, INC.
14 FORTUNE DRIVE, BILLERICA, MA 01821 (978) 667-3805, FAX (978) 663-9782
www.epotek.com

Page 1 of 2

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EPO-TEK OG116-31
Technical Data Sheet
For Reference Only
UV Cure Optical Epoxy

EPO-TEK® OG116-31 Advantages & Suggested Application Notes:● Viscosity/rheology adapted to high volume syringe needle dispensing with no tailing.
● Versatility in cure. Product responds to a broad range of UV light, and secondary thermal post-curing.
● Suggested applications:◊ Semiconductor: COB glob top covering IC’s and wire bonds; glob top dam; encapsulating and sealing; adhesion
to FR4, Kapton, silicon.
◊ Fiber Optic: making fiber optic pigtails; active alignment of optics; adhesion to many types of glass, metals,ceramics and plastics.
◊ Opto-electronic:▪ Perimeter/main seal for LCD’s, compatible with VAN liquid crystal for LCoS devices.
▪ Adhesive technology described in Technical Paper # 55 http://www.epotek.com/technical-papers.asp● High Tg and low outgassing are indicative of its high temperature performance.

Epoxies and Adhesives for Demanding Applications™
This information is based on data and tests believed to be accurate. Epoxy Technology, Inc. makes no warranties (expressed or implied) as to its
accuracy and assumes no liability in connection with any use of this product.

EPOXY TECHNOLOGY, INC.
14 FORTUNE DRIVE, BILLERICA, MA 01821 (978) 667-3805, FAX (978) 663-9782
www.epotek.comPage 2 of 2