OMEGABOND®High Temperature
Air Set Cements
⻬ Heat Conductive
⻬ Thermal Shock Resistant
⻬ Insulate Electricity
⻬ Resists Oils, Solvents,
Most Acids
⻬ Adheres to Practically
All Clean Surfaces**
OB Series
Starts at
$
36
OMEGABOND
®
300
®
OMEGABOND
Air Set Cements set or cure through
loss of moisture by evaporation.
Atmospheric conditions therefore
affect the drying rate. Air Set
Cements are used mainly in thin film
applications (applied in thicknesses
less than 1⁄4")*.
400
Selection Criteria
for Cements
1. Type of Application—
Potting, sealing, encapsulating,
assembling, bonding. Is a thick or
thin film of cement required?
This dictates whether or not an
air set or a chemical set cement
should be used.
2. Thermal Considerations—
What is the maximum
temperature that the cement
must withstand? What degree of
thermal conductivity is needed?
What degree of thermal
expansion is allowed? These
parameters are then matched
to the appropriate cement.
OMEGABOND®500
OMEGABOND®500
Powder
3. Substrate—What materials will
the cement be in contact with?
4. Application Considerations—Pot
life, set time, method of dispensing,
batch size, cure procedure.
5. Miscellaneous Considerations—
Porosity, moisture absorption,
electrical resistance, volume
stability, clearances/tolerances.
Liquid
MOST POPULAR MODELS HIGHLIGHTED!
To Order
Model No. Price Description
OB-300 $36 OMEGABOND®300 powder, 8 fluid oz
OB-400 36 OMEGABOND®400 powder, 8 fluid oz
OB-500 POWDER
OB-500 LIQUID 36 OMEGABOND®500 liquid, 8 fluid oz
OB-KIT-1 54 Air set cement kit, ideal for research purposes;
OB-TL 36 OMEGABOND®thinning liquid,
See next page for footnotes.
*, **
Ordering Example: OB-400, is a high temperature air set cement, 8 fluid oz, $36.
(Specify Model Number)
(1 part cement; just mix with water)
(1 part cement; just mix with water)
36 OMEGABOND®500 powder, 8 fluid oz
(2 part cement; mix powder with OB-500 liquid)
(2 part cement; mix liquid with OB-500 powder)
includes 2 fluid oz each of OB-300, OB-400,
OB-500 powder and OB-500 liquid
8 fluid oz used to dampen porous substrates
before application of mixed OB-300
or OB-400 cements
F-23
High Temperature Air Set Cements
Applications
OMEGABOND®300 OMEGABOND®400 OMEGABOND®500
⻬ Assembling ⻬ Coating ⻬ Coating
⻬ Sealing ⻬ Embedding ⻬ Dipping
⻬ Insulating ⻬ Insulating ⻬ Casting
Physical Properties
†
OMEGABOND 300 OMEGABOND 400 OMEGABOND 500
Type of Cement (1 or 2 Part) 1 Part 1 Part 2 Part
Coefficient of thermal expansion, in/in°F 6.2 x 10
Color Off white Tan to gray Off white
Compressive strength, psi 3900 3300 1500
-6
13.0 x 10
-6
10.93 x 10
-6
††
Dielectric constant 3.5 to 6.0 3.4 to 4.5
Dielectric strength at 20°C (70°F), V/mil 12.5 to 51.0 12.5 to 51.0
Dielectric strength at 400°C (750°F), V/mil ≤15.0 ≤15.0
Dielectric strength at 795°C (1475°F), V/mil ≤1.3 ≤1.3
Maximum service temperature, °C (°F) 980 (1800) 1425 (2600) 1205 (2200)
Modulus of rupture, psi 460
Shear strength, psi 710 375
Tensile strength, psi 410 325 1500
Volume resistivity at 20°C (70°F), Ω-cm 108-10
Volume resistivity at 400°C (750°F), Ω-cm 104-10
Volume resistivity at 795°C (1475°F), Ω-cm 102-10
Density (wet), lbs/ft
Density (dry), lbs/ft
3
3
Flexural strength, psi 2000
Modulus of elasticity, psi 3.6 x 10
9
5
3
108-10
105-10
103-10
9
6
4
112
82
††
5
Pot life, hr 1.0
Thermal conductivity, btu-in/ft2-hr-°F 4-6 11
Mix ratio 1-part cement; just 1-part cement; just 2-part cement: just
mix powder with water mix powder with water mix powder and binder;
to a smooth, uniform to a smooth, uniform mix ratio for cast
consistency consistency applications ranges
from 1.87 to 2.0 parts
powder to 1-part liquid
binder by weight
Curing schedule OMEGABOND 300
®
OMEGABOND 400
®
OMEGABOND 500®has
cures at room cures at room a pot life of 1-hr after
temperature by air drying temperature by air drying the powder and binder
in 18 to 24-hr, depending in 18 to 24-hr, depending are mixed together;
upon thickness and upon thickness and OB-500 reaches an
consistency; cure time consistency; cure time initial air set after 4-hr
can be accelerated by can be accelerated by at room temperature;
low temperature oven low temperature oven a final set is only reached
drying at 82°C (180°F); if the drying at 82°C (180°F); if the after oven baking at
cement is to be exposed cement is to be exposed 55°C (130°F) for 4-hr;
to elevated temperatures, to elevated temperatures, if the cement is to be used
cure for 18 to 24-hr at cure for 18 to 24-hr at at temperatures above
ambient temperature, ambient temperature, 100°C (212°F), OB-500
then oven dry for 4-hr then oven dry for 4-hr must under go an extended
at 82°C (180°F) and for at 82°C (180°F) and for cure at 105°C (220°F) or
an additional 4-hr at an additional 4-hr at above for 12 hours
105°C (220°F), this helps to 105°C (220°F), this helps to
prevent spilling prevent spilling
F
Distinguishing characteristics Lower thermal Higher thermal conductivity Withstands short-term
and applications conductivity and and coefficient of thermal immersion in molten
coefficient of thermal expansion; high maximum metal; used as a
expansion temperature rating coating on expendable
thermocouple tubes
†
These physical properties were determined under laboratory conditions using applicable ASTM procedures. Actual field data may vary.
Do not use physical properties data for specifications.
††
Strength at 1 day after curing at 105°C (220°F).
Chemical set cements are also available. See OMEGABOND®600, OMEGABOND®700 and CC high temperature cement. These cements set
*
or cure by an internal chemical action which does not require exposure to air. They can be used in thick applications (greater than 1⁄4" thickness).
Porous substrates may require dampening with thinning liquid before application of mixed cement. For OMEGABOND®300 and OMEGABOND
**
400 (1 part cements), order OMEGABOND®thinning liquid (8 fluid oz), OB-TL, $36. For OMEGABOND®500 (2 part cement), use OMEGABOND
500 liquid to dampen porous substrates.
F-24
®
®
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EPG05
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