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RTV 185
High tear mold making RTV Silicone
DESCRIPTION
Epusil RTV 185 is
high tear strength, high elongation cur RTV Silicone
rubber.
Properties - Uncured
Part A
Part B
Color, visual ..........................…..
White
Transparent
Viscosity (cps @ 250C)...…...…..
35000 to 45000 250
Specific Gravity (gr/cm3 @ 250C).
1.2 1.05
Mix Ratio (weight) ..........……..….
100:5
Mix viscosity (cps @ 250C).……...
30000-35000
Pot life @ 250C
....................……..
2.5-3 hours
Shelf life @ 250C (months)...………
6 6
Properties - Cured
Physical
Hardness, Shore A ..............……… 35-40
Tensile Strength kg/cm .......……… 48-53
Tensile Elongation % ..........…….. 200+/- 20
Tear Strength (Die B kg/cm2)....…. 25 +/- 2
Service temperature ............………. -50 to 2000C
Mixing Instructions
1.
Pre-mix RTV 185 Part A in its original container.
2.
Weigh out required amount of part A. Weight into 5
parts oh Part B (catalyst) for each 100 parts of
Part A (base)
3.
Mix thoroughly, scraping both the bottom and side of
the mixing container.
4.
Place in a vacuum chamber and draw about 29 inches
of mercury. The mixture will rise to about 3-4 times
the original volume, then collapse. Hold the vacuum
for another 4 to 5 minutes and release.
Proceed to pour mold.
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