Silicones
OBA's association with Dow Corning extends over 25
years and we are a prime distributor for their electrical
and electronic product range.
Silicants are formulated to provide excellent adhesion to
many surfaces, offering high mechanical strength while
absorbing stress and vibration, and provide protection for
electrical components in both high and low temperature
environments.
Our range includes the popular RTV732 adhesive
sealants, as well as high temperature, non-slump,
flowable, non-corrosive, petroleum-resistant grades.
Applications
Sealants
Primers
Thermally Conductive Compounds
High Voltage Insulator Coating
Dry film Lubricant
High Performance Lubricants
Conformal Coatings
Silicone Encapsulants (Silgard)
Molycote
Sealants
| Type |
Colour |
Temperature range ºC |
Working Time, Minutes |
Cure Time, hours (3mm thick) |
Specific Gravity |
Pack Size |
Shelf Life (Months) |
Extrusion rate (GM/Min) |
Tensile Strength |
Hardness H (Shore A, points) |
Elongation % |
Specific Applications |
| 730 |
White |
-57 to +260 |
5 |
48 |
1.4 |
90ml |
6* |
200 |
2.1 |
35H |
175 |
Solvent Resistant |
| 732 |
Clear, white Black, Aluminium |
-65 to +232 |
5 |
24 |
1.04 |
150gm, 310gm |
6* |
350 20kG |
2.4 |
30H |
500 |
Multi-purpose |
| 734 |
Clear, White, Black |
-65 to +232 |
5 |
24 |
1.04 |
150gm, 310gm, 17Ltr |
12* |
450 |
1.5 |
24H |
370 |
Flowable Sealant |
| 735 |
Black |
-62 to +210 |
10 |
24 |
1.07 |
90ml, 305ml, 17Ltr |
12M |
300 450 |
2.2 |
40H |
300 |
Neutral Cure, Oil Resistant |
| 736 |
Red |
-65 to +260 |
5 |
24 |
1.05 |
305ml, 17Ltr |
6* |
335 |
2.4 |
32H |
500 |
Heat resistant |
| 738 |
White |
+200 |
20 |
24 |
1.04 |
90ml, 305ml, 17Ltr |
6* |
600 |
2 |
34H |
500 |
Neutral Cure, Non Corrosive & Electrical use |
| 739 |
White, Black |
-54 to +150 |
15 |
24 |
1.52 |
90ml, 305ml, 17Ltr |
6* |
110 |
2.3 |
37H |
640 |
Neutral Cure, Plastic Adhesive |
| 747 |
Translucent, White, Black |
-65 to +232 |
15 |
24 |
1.03 |
310ml, 20kG |
12* |
350 |
2 |
23H |
500 |
Neutral Cure, Excellent Adhesion |
| 748 |
White |
-55 to +177 |
10 |
36 |
1.33 |
90ml, 305ml, 17Ltr |
18M |
150 |
2.8 |
35H |
350 |
Neutral Cure, Non Corrosive & Electrical use |
| 786 |
Translucent, White |
-55 to +177 |
7 - 15 |
7 to 14 Days |
- |
305ml |
12* |
- |
1.7 |
25H |
- |
Mildew Resistant |
| 1080 |
Translucent, White, Black |
-65 to +232 |
15 |
24 |
1.03 |
310ml, 20kG |
12* |
350 |
2 |
23H |
500 |
Electrical Applications |
| 7091 |
Black, White, grey |
-55 to +180 |
15 |
7 days |
1.4 |
310ml, 20kG |
12M |
185 |
2.5 |
37H |
680 |
Designed for use with dissimilar materials where expansion rates differ. |
Download:
Data Sheet
Primers
|
Colour |
Viscosity @ 25ºC |
Flashpoint (ºC) |
Solvent |
Specific Garavity @ 25ºC |
Nonvolatile Content % |
Shelf Life (Months |
Application |
| 1200 Primer |
Red, clear |
1 |
17 |
VM & P Naptha |
0.767 |
4.7 |
12 |
Used to promote adhesion of a variety of one and two pack elastomer products to various substrates |
| 1204 Primer |
clear |
- |
8 |
Naptha |
- |
- |
12 |
Designed for use on Metal, Glass and Ceramic substrates |
| P5200 |
Clear |
- |
31 |
OS-20 |
- |
- |
18 |
Used to promote adhesion of a variety of one and two pack elastomer products to various substrates |
Download:
Data Sheet
Thermally Conductive Compounds
| Type |
SC102 |
340 |
| Description |
Thermally Conductive |
Heat sink |
| Characteristics |
Moderate Conductivity, Low Bleed, Stabel at high temperatures |
Low Bleed, Stable at high temperatures |
| Applications |
Gap fill between electronic heat sources 7 heat sinks |
Thermal coupling of Electrical / electronic devices to heat sinks |
| Type |
Single pack |
Single pack |
| Colour |
White |
White |
| Viscosity |
Non-flowing |
|
| Specific Gravity |
2.37 |
2.1 |
| Thermal Conductivity @25ºC (Watt/meter K) |
0.85 |
0.59 |
Download:
Data Sheet
High Voltage Insulator Coating
| PROPERTIES / TYPE |
3099 HVIC Compound |
| Applications |
Greaselike film to provide long-term resistance to water filming and flashover |
| Physical |
Grey Opaque |
| Consistency / Penetration (Unworked) |
260 |
| Consistency / Penetration (Worked) |
270 |
| Specific Gravity @ 25ºC |
1.3 |
| Shelf Life, Months |
60 |
| Dielectric Constant @ 100Hz |
3.88 |
| Dielectric Constant @ 100kHz |
3.86 |
| Dissipation Factor @ 100Hz |
0.0148 |
| Dissipation Factor @ 100kHz |
0.0066 |
| Dielectric Strength , 196μM(Volts/Mil) |
285 |
| Volume Resistivity (Ohm-cm) |
1.46 x 1013 |
| Mil spec approved |
Yes |
| Arc Resistance , Time to Erode 3.2mm @ 2.5kV (Minutes) |
800 |
| UL recognised |
Yes |
Download:
Data Sheet
Dry film Lubricant
| Product |
Base Fluid/Solvent |
Solid Lubricant |
|
Thickener |
Colour |
Service temperature (ºC) |
Consistency/ Penetration (NLGI) |
Miscellaneous Information |
| 557 |
Naptha |
- |
|
- |
Clear |
-40 to +43 |
|
Available in Spray or Liquid. The application temperature must be above freezing point |
| 316 |
Naptha |
Silicone Compound |
|
|
Clear |
<199 |
|
Designed for use in the Food & Beverage industries |
Download:
Data Sheet
High Performance Lubricants
| PROPERTIES / TYPE |
No 7 Release |
No 4 Elect. Insulating |
111 Valve Lubricant |
| Applications |
Mold release, Rubber Lube, Airframe Lube, Extruder and Packaging machines |
Moisture Proof Seal for Aircraft, Automotive, & marine Ignition Systems |
Sealant for Vacuum & Pressure systems in marine, Aircraft, Electrical service covers, & Underground connections |
| Physical |
Compound |
Compound |
Sealant |
| NLGI |
No 1 |
No 2 |
No 3 |
| Specific Gravity @ 25ºC |
1 |
1 |
1 |
| Shelf Life, Months <25ºC |
60 |
60 |
60 |
| Service Temperature range |
-40 to +400 |
-70 to +400 |
-40 to +400 |
| Dielectric Constant @ 100Hz |
2.85 |
2.98 |
2.88 |
| Dielectric Constant @ 100kHz |
2.83 |
3.01 |
2.95 |
| Dissipation Factor @ 100Hz |
<0.0001 |
<0.0001 |
<0.0001 |
| Dissipation Factor @ 100kHz |
<0.0001 |
<0.0002 |
<0.0005 |
| Dielectric Strength (Volts/Mil) |
445 (2) |
400 (2) |
380 (2) |
| Volume Resistivity (Ohm-cm) |
2.8 x 1015 |
1.,1 x 1015 |
2.17 x 1015 |
Download:
Data Sheet
Conformal Coatings
| PROPERTIES / TYPE |
1-2577 |
3140 |
3-1753 |
| Physical nature (As cured) |
Resin |
Elastomer |
Elastomer |
| Solids Content, % |
72 |
96 |
98 |
| Viscosity @ 25ºC, cps |
725 |
30000 |
385 |
| Specific Gravity @ 25ºC |
1.04 |
1.03 |
0.99 |
| Shelf Life, Months |
12 |
12 |
12 |
| Cure System |
RTV / Heat |
RTV / Heat |
RTV / Heat |
| Surface dry, Tack free time, minutes |
20 (RT/50% RH) |
70 (RT/50% RH) |
8.0 (RT/50% RH) |
| Cure Time / Temperature (25ºC) |
72 Hrs / 25 |
72 Hrs / 25 |
24 Hrs / 25 |
| Tensile Strength (N/cm2) |
282 |
310 |
69 |
| Elongation (%) |
60 |
420 |
120 |
| Stress relief |
Average |
Good |
Excellent |
| Dur. Hardness (points) |
27 SH D |
37 SH A |
25 SH A |
| Solvent resistance |
Average (1) |
Average (1) |
Average (1) |
| Repairability |
Good |
Good |
Good |
| Dielectric Constant @ 100Hz |
2.74 |
2.52 |
2.53 |
| Dissipation Factor @ 100Hz |
0.004 |
0.000098 |
0.001 |
| Dielectric Strength (Volts/Mil) |
400 (2) |
445 (2) |
380 (2) |
| Volume Resistivity (Ohm-cm) |
5.0 x 1013 |
2.1 x 1014 |
1.0 x 1015 |
| Mil spec approved |
Yes |
Yes |
- |
| UL recognised |
Yes |
Yes |
Yes |
Download:
Data Sheet
Silicone Encapsulants (Silgard)
| Product Type |
160 |
170 |
182 |
184 |
527 |
3110 |
3120 |
| General |
| Type |
2 pack |
2 pack |
2 pack |
2 pack |
2 pack |
2 pack |
2 pack |
| Mix Ratio |
1:1 |
1:1 |
10:1 |
10:1 |
1:1 |
10:1 |
10:1 |
| Cure Condition |
RT / HA |
RT / HA |
HA |
RT / HA |
RT |
RT |
RT |
| Cure time @25ºC (Hours) |
24 |
24 |
45min @ 100ºC |
48 |
24 Hours / 1 week |
Refer spec >7 |
Refer spec >8 |
| Colour |
Grey |
Dark Grey |
Clear |
Clear |
Clear |
White |
Red |
| Viscosity (Centipoise) |
4000 |
2900 |
3900 |
3900 |
425 |
130 |
280 |
| Durometer (Shore A) |
60 |
40 |
50 |
50 |
- |
45 |
60 |
| Specific Gravity |
1.57 |
1.37 |
1.03 |
1.03 |
0.97 |
1.14 |
1.45 |
| Working Time @ RT |
30 min. |
15 min. |
>8 |
>2 |
90 |
<2 |
<1 |
| Shelf Life (Months) |
18 |
24 |
24 |
24 |
12 |
24 |
24 |
|
| Thermal |
|
|
|
|
|
|
|
| Thermal Conductivity - Watt meter (oK) |
0.58 |
0.4 |
0.18 |
0.18 |
- |
5.7x10-4 |
7.5x10-4 |
| Linear Coefficient of Thermal Expansion (μM/M) |
240 |
270 |
310 |
310 |
- |
- |
- |
|
| Electrical |
|
|
|
|
|
|
|
| Dielectric Strength (kV/mm) |
20.9 |
18.9 |
21.2 |
21.2 |
15.1 |
434V/mm |
437V/mm |
| Dielectric Constant @ 100Hz |
3.3 |
3.17 |
2.65 |
2.65 |
2.85 |
2.29 |
4.19 |
| Dielectric Constant @ 100kHz |
3.2 |
3.16 |
2.65 |
2.65 |
2.85 |
2.2 |
3.54 |
| Volume Resistivity (Ohms/cm |
1.0 x 1015 |
3.1 x 1013 |
1.2 x 1014 |
1.2 x 1014 |
7.0 x 1015 |
7.3 x 1013 |
2.7 x 1013 |
| Dissipation factor @ 100Hz |
0.01 |
0.003 |
0.0005 |
0.0005 |
0.002 |
0.01 |
0.07 |
| Dissipation factor @ 100kHz |
0.002 |
<0.001 |
<0.001 |
<0.001 |
<0.001 |
0.001 |
0.017 |
|
| UL Listing |
|
|
|
|
|
|
|
| Flammability |
94 V-0 |
94 V-0 |
94 V-1 |
94 V-1 |
- |
- |
- |
| Temperature Index (ºC) |
105/105 |
170/170 |
130/130 |
130/130 |
- |
- |
- |
| MIL Stds |
- |
Yes |
Yes |
Yes |
- |
- |
- |
|
|
|
|
|
|
|
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| Notes |
|
|
|
|
|
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|
| 1. For 31120 & 3120 two typoe of Catalyst are available |
| Cat S is the standard catalyst that provide a curing time of between 5 to 12 hours, depending on ration for 3110 and 6 to 12 hours for 3120 |
| Cat F is a fast curing catalyst that will bring the Demould time to between 37 and 100 minutes, depending upon the mix ratio for 3110 and 25 to 90 minutes for 3120 |
Download:
Data Sheet
Molycote
Download:
Data Sheet
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