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EPUSIL RTV-263
High Tear, Low Viscosity RTV Silicone
Description
Epusil RTV-263 is
a low viscosity, translucent RTV silicone Epusil RTV-
263. Is used in situations where component
identification and vibration shock protection is
needed and also as Mold Making Silicon. Epusil
RTV-263 cure may be accelerated by the use of
elevated temperature.
PROPERTIES -
Uncured
Part A
Part
B
Color,
visual.................................
Translucent Clear
Viscosity,
ASTM-D-1084 (cps)….
30000+/-5000 1000
Specific Gravity (gr/cm2
@ 250)....
1.1 1.01
Mix Ratio
(weight)................…....
10:1
Specific Gravity
(mixed @250)......
1.1
Pot Life @ 250C
(hours)............…
2 hour
Shelf Life @ 250C
....................…
6 months
PROPERTIES - Cured
Physical
Hardness,
ASTM-D-2240 (Durometer)............. Shore A 30 - 32
Tensile Strength,
ASTM-D-412........................ 35 - 37 kg/cm2
Tensile Elongation,
ASTM-D-412 .................. 600 - 630%
Tear Strength,
(kg/cm) die B .......................... 37 - 39
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)... 550
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- 263 Part A.
2.
Measure 1 part of B side into each 10 parts of A
side
3.
Mix thoroughly, scraping both sides and bottom of
container.
4.
If void-free cured RTV is essential, evacuate the
RTV at 0.15 cm pressure for about five minutes,
immediately after catalyst incorporation. Excessive
evacuation can result in slow or complete loss of
cure. Evacuate only 1-2 minutes more after the head
collapses.
CURE SCHEDULE
Overnight at room temperature (12-16 hours) at 250C;
two hours at 600C; one hour @ 800C.
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