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EPUSIL RTV-266
Clear, low Viscosity RTV Silicone
Description
Epusil RTV-266 is
a low viscosity, transparent RTV silicone compound
which cures to a water-clear silicone gel. Epusil
RTV-266 is used in situations where component
identification and vibration shock protection is
needed. Epusil RTV-266 cure may be accelerated by
the use of elevated temperature.
PROPERTIES - Uncured
Part A
Part B
Color,
visual.................................……
Clear Clear
Viscosity,
ASTM-D-1084 (c.p.s.) ……
1,400+/-100 2,000+/-100
Specific
Gravity...........................…….
1.00 1.00
Mix Ratio
(weight)....................……...
1:1
Mixed Viscosity,
ASTM-D-1084……..
1,600+/-200 c.p.s.
Specific Gravity
(mixed). ............…….
1.00
Pot Life @ 250C
(hours)............…..….
2.5 hour
Shelf Life @ 250C
...................……..…
6 months
PROPERTIES – Cured
Physical
Hardness,
ASTM-D-2240 (Durometer).
Shore A 25 - 30
Tensile Strength, ASTM-D-412
.............
700+/-50 psi. (50 kg/cm2)
Tensile Elongation,
ASTM-D-412
......... 100%
Tear Strength,
ASTM-D-624 (Die B-kg./cm.)
17+/- 2
Coefficient of
Thermal Expansion (cm/cm/0C)
27*10-5
Linear Shrinkage
...................................
< 0.2
Service
Temperature..............................
-550C to 2040C
Electrical
Dielectric Strength,
ASTM-D-149 (volts/mil)....
500
Dielectric Constant,
ASTM-D-150 (60 Hz)....... 3.0
Dissipation Factor,
ASTM-D-150 (60Hz).........
0.001
Volume Resistivity,
ASTM-D-257 (ohm-cm)... 1.0*1015
MIXING INSTRUCTIONS
1.
Weigh out amount of Epusil RTV-266 Part A.
2.
Measure into Part A 1 part of Part B for each part
of Part A.
3.
Mix thoroughly, scraping both sides and bottom of
container.
4.
Pour into cavity or unit. Epusil RTV-266 will de-gas
if left undisturbed for 5 to 10 minutes.
5.
Too excessive evacuation can cause slow or loss of
cure. Once the head collapses evacuate for 1-2
minutes more, then release.
CURE SCHEDULE
Overnight at room temperature (12-16 hours) at 250C;
two hours at
500C; one hour @ 650C
NOTE
Certain materials may inhibit the cure of RTV 266
when placed in contact with the mixed, uncured
rubber. Materials such as amines, amine-cured
epoxies and other may cause inhibition. Even
surfaces, which have been in contact with such
materials, may also cause this condition.
If this occurs, a barrier coat, such as a clear
acrylic spray will effectively protect from this
inhibition.
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