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RTV 186
High tear mold making RTV Silicone
DESCRIPTION
Epusil RTV 186 is
high tear strength, high elongation cur RTV Silicone
rubber.
Properties -
Uncured
Part A
Part B
Color, visual ..........................…….
White
Transparent
Viscosity (cps @ 250C)...…...…….
25000 to 35000 250
Specific Gravity(@ 250C)..….…….
1.15 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 ...........………... 22-27
Tensile Strength kg/cm2
.......……... 48-53
Tensile Elongation % ........……..... 430+/- 20
Tear Strength (Die B kg/cm)..…….. 27 +/- 4
Service temperature .............…….... -50 to
2000C
Mixing
Instructions
1.
Pre-mix RTV 186 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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