Gasket
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Property
| Property |
ASTM C864
|
Thermo-plastics
|
Thermoset Rubber/ Elastomer
|
Thermoplastic Elastomer – TPE
|
||
|
PVC
|
Neoprene
|
EPDM
|
Silicone
|
|||
| Hardness, Shore A (ASTM D2240) |
70 (±5)
|
51-65 (±3)
|
75 (±5)
|
75 (±5)
|
75 (±5)
|
54-90 (±5)
|
| Elongation (D412) % |
200
|
330-410
|
200
|
250
|
200
|
180-550
|
| Flame retardance (C542) |
Must not propagate flame
|
Does not propagate flame
|
Does not propagate flame
|
Will propa-gate flame
|
Does not propagate flame
|
Some will propagate flame
|
| Brittleness temp. max (ºC) |
-40
|
-30
|
-40
|
-43
|
-79
|
-62 to -76
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| Toxicity |
No
|
Yes
|
No
|
No
|
No
|
No
|
| Ozone resistance, 1ppm for 100 hours @ 40ºC (D1149) |
No cracks
|
No cracks
|
No cracks
|
No cracks
|
No cracks
|
No cracks
|
| Compression set (D395B) % |
.
|
.
|
.
|
.
|
.
|
.
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| 22 hours @ 100ºC |
30
|
NA
|
25
|
25
|
20
|
31-42
|
| 70 hours @ 100ºC |
NA
|
47
|
30
|
40
|
NA
|
24-30
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| Heat Aging 70 hrs @ 100ºC (D865) |
.
|
.
|
.
|
.
|
.
|
.
|
| Hardness, Shore A |
+ 10 max
|
NA
|
+2
|
+5
|
+3
|
-2 to 0
|
| Ult. Tensile Strength % |
-15
|
NA
|
0
|
-14
|
-10
|
-8 to 1
|
| Ult. Elongation % |
-40
|
NA
|
-8
|
-29
|
-20
|
-7 to +5
|
| UV Resistance |
NA
|
Good
|
Good
|
Excellent
|
Excellent
|
Excellent
|
| Tensile Strength (D412) MPa |
12.4
|
11.7
|
13.8
|
13.8
|
5.5
|
4.0-8.5
|
| Fluid Resistance |
.
|
.
|
.
|
.
|
.
|
.
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| Water |
.
|
.
|
Good
|
Good-excellent
|
Good
|
Excellent
|
| Acid and base |
.
|
.
|
Good
|
Good-excellent
|
Fair-good
|
Excellent
|
| Oil- aliphatic |
.
|
.
|
Good
|
Poor
|
Good
|
Good
|
| Oil- aromatic |
.
|
.
|
Fair
|
Poor
|
Poor
|
Fair
|
| Thermal Conductivity (W/m.K) |
NA
|
±0.184
|
±0.302
|
±0.329
|
±0.206
|
0.17-0.18
|
Service Temperature
-60 to +135°C
Water Absorption
=< 0.08%
Compatibility
The compatibility of gasket material and other aluminium finishes, glass, sealant or other glazing material shall be confirmed with the manufacturer.
Coefficient of Friction
|
.
|
Glass
|
Aluminium
|
Polypropylene
|
Polyethylene
|
Wood
|
|
0.53-1.67
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0.53-1.67
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0.75-1.49
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0.38-1.39
|
0.23-1.44
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0.25-0.71
|
Constituent
There is no typical ingredient for gasket materials, as the constituents are various depending on the manufacturer.
Sample ingredient of EPDM:
| . |
phr
|
| Vistalon 3666 |
35
|
| Vistalon 8510 |
92
|
| APF N-683 |
85
|
| Sillitin Z |
50
|
| Flexon 876 |
45
|
| PEG 3350 |
3
|
| Stearic Acid |
1
|
| Zinc Oxide |
5
|
| Calcium Oxide |
8
|
| Sulfur |
1
|
| MBT |
0.5
|
| MBTS |
0.5
|
| ZBEC |
0.7
|
| ZDBP |
1
|
| Geniplex-80 |
0.7
|
| TBzTD |
0.5
|
| Vulkalent E C |
0.3
|
Density
| ASTM D792 |
Hardness
|
||||
|
55
|
60
|
65
|
70
|
75
|
|
| Density (g/cm3) |
0.96
|
0.97
|
0.97
|
0.97
|
0.96
|