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Thermally Conductive Epoxy

Thermally Conductive Epoxies and Thermally Conductive Grease


Item# OB-100-1

 This item is available for quick shipping
Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $16.36
10-24 $15.54
25-49 $15.21
50-99 $14.56
100-199 $14.23
200+ $13.91

In stock

Lead Time ( If not in Stock): 3 weeks

Thermally Conductive Epoxies and Thermally Conductive Grease OB-100-1 OB-100-1
  • Thermally Conductive
  • Electrical Insulator
  • Resist Oils, Solvents, Most Acids
  • OMEGABOND™ 100 Two Part Epoxy: Low Thermal Conductivity. Sets at Room Temp. Good to 130°C (265°F)
  • OMEGABOND™ 101Two Part Epoxy: High Thermal Conductivity. Sets at Room Temp. Good to 105°C(221°F)
  • OMEGABOND™ 200 Two Part Epoxy: Very High Thermal Conductivity. Sets in 2 Hrs at 205°C(400°F). Good to 260°C(500°F)
  • OMEGATHERM™ 201Silicone Paste: Extremely High Thermal Conductivity. Non-Adhesive. Does not Harden. Good from -40 to 200°C(-40 to 392°F

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Product Specs

OMEGABOND™ epoxy and OMEGATHERM™ thermal conducting paste are easy to use epoxies and silicone products. They are specially formulated for permanent bonding of thermocouples, thin film RTDs, thermistors and other temperature sensors, to most surfaces–metals, ceramics, glass, plastics, paper products. OMEGABOND™ and OMEGATHERM™ products are compounded and packaged for convenient, easy mixing and application. Each formulation exhibits important characteristics necessary for accurate, fast, reliable temperature measurement. These are: good adhesion and strength, high temperature rating, high thermal conduction, high electric insulation, thixotropic consistency, fast cure, and easy application.

OB-100 is available in 1/4 oz or 1 oz Twin Packs and 1 lb as 2 cans, 1 of resin and 1 of hardener.
OB-101 is available in 1/2 oz or 2 oz Twin Packs and 1 lb as 2 cans, 1 of resin and 1 of hardener.
OB-200 is available in a 2 oz Twin Packs or 1 lb as 2 cans, 1 of resin and 1 of hardener.
OT-201 is available in 1/2 oz or 2 oz Twin Packs or in cans as 1 lb or 2 lb (two 1 lb cans).

“Twin pak” packaging is supplied to ensure the user with accurate proportioning of resin and catalyst, as well as to provide a clean, fast means of mixing. The “Twin Pak” is a flexible, transparent plastic pouch, separated into two isolated compartments by means of a removable external divider. In one compartment is the resin, the other the pre-measured catalyst. To use, remove the divider, mix the two components by kneading the pouch, then snip off a corner to dispense. Each “Twin Pak” comes with an instruction sheet, enclosed in a clear, heat-sealed plastic envelope.

Please note that once mixed, the OB-100, OB-101 and OB-200 epoxies have the following "Working Times" (also referred to as "Pot Life"):
OB-100: Less Than 8 Minutes at Room Temperature
OB-101: Approximately 30 Minutes at Room Temperature
OB-200: Approximately 24 Hours at Room Temperature

Rated 4 out of 5 by from Formula changed! We use this epoxy weekly and have been buying it for many years. However, the last batch we purchased was a gel formula instead of the liquid we have become accustom to. Do no like it very much as it is difficult to fill a syringe and use it in the field.
Date published: 2015-12-04
Rated 5 out of 5 by from Omegabond 101 I have been using OB-101 in the small packs for several years now to bond the printed circuit board to the frame/case, which as also the heat sink, on automotive Engine Control Modules manufactured with surface mount components. It withstands thermal expansion and contraction, and vibration, while also being a good thermal conductor and yet a good electrical insulator. Shelf life is substantially longer that what is marked on the packets.
Date published: 2019-04-15
Rated 3 out of 5 by from Way too long to ship. The product works as expected but a 3 week lead time is ridiculous.
Date published: 2021-08-14
Rated 5 out of 5 by from Used on automotive ECM's. I have used this for several years on automotive ECM's where SMD power transistors and switches are soldered to the PCB, which is then attached to an aluminum case for heat dissipation. This a requires a product with good thermal conductivity with a high dielectric rating. It has a very smooth and easy to spread consistency, and a good balance of pot life v.s. cure time.
Date published: 2020-07-14
Rated 5 out of 5 by from OmegaBond 101 is an excellent thermal epoxy OmegaBond 101 is our go-to thermal epoxy. It bonds well and hard. Excellent when we need to thermocouple a tiny component. Once it is on it stays on.
Date published: 2020-04-09
Rated 1 out of 5 by from Continusliy receiveing expired material Out of the last three orders placed and received, there is always epoxy packs that have expired material sent to us as noted by the expiration date on each pack. This I repeadily happening.
Date published: 2020-03-29
Rated 3 out of 5 by from Great Product - Difficult to Apply We have been using this product for several years to fasten temperature sensors to the back of solar panels. It works great for the application, but it's difficult and extremely messy to apply. Because we are typically working upside down and in cramped spaces, it's extremely difficult to get the product in place without having it drip or get all over your hands. A better applicator for the smaller packages would be really helpful.
Date published: 2018-12-31
Rated 5 out of 5 by from Great product! Fast shipment! Great product! Fast shipment! Easy to use. I knew this product from other Engineer. I'd recommend this product to other Engineers too.
Date published: 2018-11-26
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Is Omegabond 101 UL Listed?

Asked by: cory o
Thank you for your inquiry. This product is not UL listed.
Answered by: Application Engineer JB
Date published: 2020-05-01

What is the failure mode if the epoxy is used after the expiration date? What properties are compromised? OB-101, 1/2 oz twin pack in my case.

Asked by: WaionthaBill
Hi WaionthaBill, Thank you for the inquiry. All characteristics are impacted. Most impacted are bonding, shear and flex strength. Best regards, OMEGA
Answered by: NorwalkAE_RS
Date published: 2021-01-19

For OB-101, the working life after mixing is 30 mins. What is the shelf life for a closed product? What is the shelf life after opening (not mixed)?

Asked by: Cosmo Kramer
Thank you for your inquiry. The shelf-life is 6 months.
Answered by: Application Engineer CB
Date published: 2021-08-13

Can you recommend a filler / thickener for OB-200? I am looking to bond a stainless cooling tube to a stainless plate and the OB-200 is a bit too thin to get a nice fillet. Would Stainless steel powder be an acceptable filler for OB-200?

Asked by: Marco
Hi, Omega does not sell nor have we tested any thickening agents with the OB-200. If you need a cement with a bit thicker consistency you might want to look at a cement like the OB-600 as a possible substitute.
Answered by: Engineer9
Date published: 2020-01-29

Is OMEGABOND 101 Two Part Epoxy good for potting electronics? How well does it handle thick layers and or voids between adhered surfaces? How thick/viscus is the epoxy as you work with it?

Asked by: spacer
OMEGABOND®100—a fast (8 to 12 minute setting time), room temperature, two-part epoxy. Recommended for easy temporary and permanent bonding of beaded wire and “cement-on” thermocouples. Adheres to metals, ceramics, epoxy laminates, glass, wood, concrete and many other materials—for temperature measurements up to 129°C (265°F). It is not recommended for those endeavoring to achieve the ultimate in precision and speed of response, since this unfilled system has a relatively low thermal conductivity.Temporary installation of beaded wire thermocouples can be achieved by using a very small amount of OMEGABOND® 100 to tack the bead to the surface and packing OMEGATHERM® 201 around the exposed surface to improve heat transfer. This clear syrup consistency—100% solid adhesive — contains no solvents and has good strength and electrical insulation characteristics. Note: The working time after mixing the 2-part system at room temperature is only 6 to 8 minutes. OMEGABOND 100 is available in “Twin Pak” packs and 1- and 2-pound kits. For larger gaps, up to 1/4", review the OB-400 High Temperature Air Set Cement.
Answered by: Temperature
Date published: 2021-02-16

What happens to grease if it is use at more than 500F?

Asked by: JorgeL2000
The upper rating is 392F for OT-201 and Omega does not recommend using it above that temperature. The characteristics can be altered and the material will no longer perform as specified.
Answered by: ANB ENG
Date published: 2020-05-11

Is there a solvent that we can use safely to remove OB-101? thanks

Asked by: Simon12345
Thank you for your inquiry. There are no solvents to remove this permanent epoxy. Material must be carefully scraped off surface.
Answered by: Application Engineer JB
Date published: 2020-05-18

Can the 200 cure at room temperature given enough time? Say a few days

Asked by: AxisZ
Thank you for inquiry. Unfortunately OB-200 will never cure at room temperature.
Answered by: Application Engineer CB
Date published: 2021-04-07

for the mix ratio, what does it mean by 100 part of part A (hardener) ? If i am mixing 1 ml of Part B, how much part A i need to add?

Asked by: Philip_DNA
Thank you for your inquiry Philip_DNA. If you are mixing 1 ml of Part B, you need to add 1 ml of Part A since the mixing ratio is 1:1.
Answered by: Application Engineer SP
Date published: 2021-07-02

What is a glass transition temperature of OB-200? It's not in the spec

Asked by: Vlad
Thank you for your inquiry! Unfortunately, we do not have this data for the OB-200.
Answered by: Application Engineer CK
Date published: 2021-07-15

What is the MINIMUM continuous temperature rating for cured OB-200? Can i use OB-200 for IC Encapsulation on Alumina substrate for MIL application (-65 degree C to +150 degree C)? Is it resistance to Solvent as per MIL-883, 2015?

Hi BALAGANGADHARAN, Thank you for the inquiry. For minimum curing temp please use lowest curing temperature given in manual. We do not have test data for IC encapsulation. We do not have test data to confirm rating MIL-883. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2021-04-19
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