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EPUSIL RTV 269
Clear, Low Viscosity RTV Silicone
DESCRIPTION
Epusil RTV 269
is a low viscosity, transparent RTV silicone
compound which cures to a water-clear silicone.
Epusil RTV 269 is used in situations where component
identification and vibration shock protection is
needed. Epusil RTV 269 cure may be accelerated by
the use of elevated temperature.
PROPERTIES – UNCURED
Part A
Part B
Color,
visual............................………....
Clear Clear
Viscosity ,
ASTM-D-1084 (cps)….…….
3000+/-200 3000+/-300
Specific Gravity (gr/cm3
@250)…………
1.0 1.0
Mix Ratio (weight)
………….....………. 1:1
Mixed Viscosity,
ASTM-D-1084………. 3000 +/- 200
cps
Specific Gravity
(mixed)……………….. 1.0
Pot Life @ 25 0C
(minutes)….………… 50-60
Gel Time (min @ 250
C)………………. 90-120
Shelf Life @ 25
0C.
…………………….. 6 months min.
PROPERTIES – CURED
Physical
Hardness,
ASTM-D-2240 (Durometer)………..
Shore A 30+/- 3
Tensile Strength, ASTM
D-412……………….. 40 – 45 kg/cm2
Tensile Elongation, ASTM
D-412…………….. 100 %+/-5
Tear Strength, ASTM-D-624 (Die B
kg/cm.)… 5 - 6
Coefficient of
Thermal Expansion (cm/cm/0C)....
27 * 10-5
Linear Shrinkage………………………………. <
0.2
Service
Temperature…………………………… -550C
to 2050C
Electrical
Dielectric Strength,
ASTM D-149 (volts/mil)…
500
Dielectric Constant,
ASTM -D- 150 (60 Hz)…. 3.0
Dissipation Factor,
ASTM -D- 150 (60 Hz)…. 0.001
Volume Resistivity,
ASTM -D- 257 (ohm-cm).
1.0 * 1015
Thermal Conductivity
(W/ m0C)…………..…
0.18
MIXING INSTRUCTION
1.
Weigh out amount of Epusil RTV 269 Part A.
2.
Measure into Part A, equal amount (volume or weight)
.
3.
Mix thoroughly, scraping both sides and bottom of
container.
4.
Pour into cavity or unit. Epusil RTV 269 will de-gas
if left undisturbed for 5 to 10 minutes.
CURE SCHDULE
Overnight at room temperature (12-16 hours) @ 25
0C; two hours at 50 0C;
One hour @ 65 0C.
NOTES
Certain materials may inhibit the cure of Epusil RTV
269 when placed in contact with mixed, uncured
rubber. Materials such as amines and amine-cured
epoxies, sulfur containing materials and
condensation (tin cured) silicones, are some, which
may cause inhibition. Even surfaces, which have been
in contact with such materials, may cause it. If in
doubt, a patch test should be done.
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