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OB-500 POWDER
Choose a Variant
Material Construction Option
Volume discounts available
Volume Discount Schedule
| Quantity | Price each |
|---|---|
| 1-4 | $67.64 |
| 5-9 | $64.26 |
| 10-24 | $62.91 |
| 25-49 | $60.20 |
| 50-99 | $58.85 |
| 100+ | $57.49 |
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Product Specs
<< See all Product Models| Brand |
 |
| Applications | Casting, Coating, Dipping |
| Color | Off white |
| Density, Max | Wet : 112 b/ft³ Dry : 82 b/ft³ |
| Dielectric Strength Note | Dielectric Strength at 20°C:12.5 to 51.0 V/mil;Dielectric Strength at 400°C: ≤15 V/mil;Dielectric Strength at 795°C: ≤1.3 V/mil |
| Features | Withstands short-tem immersion in molten metal; used as a coating on expendable thermocouple tubes |
| Material Construction Option | Coating Cement, Powder Part |
| Mechanical Strength Properties | Tensile Shear Strength: 1500 psi; Flexible Strength: 2000 psi; Compressive Strength: 1500 psi |
| Mix Ratio By Weight | 2-part cement: just mix powder and binder; mix ratio for cast applications ranges from 1.87 to 2.0 parts powder to 1-part liquid binder by weight |
| Modulus Of Elasticity | 3.6 x 10⁵ psi |
| Operating Temperature, Max | 1205 °C |
| Thermal Expansion Coefficient | 10.93 x 10^-6 in/in/°F |
| Volume | 8 oz |
| Working Life | OMEGABOND 500® has a pot life of 1-hr after the powder and binder are mixed together; OB-500 reaches an initial air set after 4-hr at room temperature; a final set is only reached after oven baking at 55°C (130°F) for 4-hr; if the cement is to be used at temperatures above 100°C (212°F), OB-500 must under go an extended cure at 105°C (220°F) or above for 12 hours |
| See All Specs | |
PDFs & Manuals
Show Ratings & Reviews
Rated 1 out of
5
by
Bree from
Doesn't bond to Ready-Made Thermocouples
For whatever reason this stuff does not bond to the Ready-Made ThermoCouples. It bonds to metal just fine.
Forwarded concerns on this issue.
"There are only a few possibilities – The mixture is not correct; the curing time is not sufficient or there has not been enough applied. An outside possibility is the material is no longer viable" ?????
"We let it sit over the weekend. It seems to have set up good. There was some left over in the cap we mixed it in and it was hard as a rock. It just isn’t bonding to the wire. There was plenty applied.
Material is not viable as in the bonding agent is possibly bad? Sticker on it says use before 3/2018"
No response after that...... Had to figure something else out.
Date published: 2017-06-02
Rated 1 out of
5
by
Ryan Essenmacher from
Issues with mixing and curing.
Unclear mixing instructions, susceptible to oil even at low temperatures (40°C), and doesn't like to stick to Kapton surface mount thermocouples. You need to apply pressure during the cure and rough up the surface for any hope for it to bond to the Kapton surface mount thermalcouples. I won't be purchasing this 1 part cement again, going with a 2 part for hopefully better results.
Date published: 2024-07-23
Rated 5 out of
5
by
Devin H from
Amazing product!
I am using this to attach an aluminum heat sink to an IC on some circuitboards. The thermal conductivity is amazing. It performs just as good as a high quality thermal epoxy, but it's easier to work with. I followed the instructions in the data sheet and it becomes rock hard when fully cured.
Date published: 2023-11-20
Rated 1 out of
5
by
Manu khod from
Doesn't work at high temperatures
I had bought OB700 and OB400 and they are claimed to be working at high temperatures.
Unfortunately, they are a waste at high temperatures (500-600C) and lose strength like anything. As soon as i bring them to room temperature, they offer some strength.
Clearly, they are not high-temperature cements. They are just regular ceramic powder grounded.
Date published: 2022-01-17