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Elastosil RT 621 A/B is an RTV-2
silicone rubber well suited to Pad Printing
applications. It's a pourable, addition-curing, low
durometer silicone that can be vulcanized at room
temperature, or at elevated temperatures to increase the
rate of cure. Hardness can be reduced even further by
adding Wacker AK 35 silicone fluid. It has high system
reactivity for fast demolding even when large amounts of
silicone fluid have been added.
Features
- cures to a nominal 25 duro Shore A hardness
- very high tear resistance
- fast non-shrink cure at room temperature
- exhibits very good flow
Basic Typical Physical Properties
|
RubberWorks RTV Data Sheet |
Elastosil RT 621 A/B |
| Property |
Test Procedure |
Component A |
|
Component B |
| Appearance |
|
White |
|
Reddish
Brown |
| Density,
23 C, g/cm3 |
DIN 52
479 A |
1.13 |
|
1.01 |
| Viscosity,
23 C, cPs |
Brookfield |
25,000 |
|
800 |
| |
|
|
Mixed 9:1 Ratio |
|
| Hardness,
Shore A |
DIN 53
505 |
|
25 |
|
| Tensile
Strength, psi |
DIN 53
504 S3 |
|
1015 |
|
| Elongation
at Break, % |
DIN 53
504 S3 |
|
750 |
|
| Tear
Resistance, ppi |
ASTM
D624, B |
|
>170 |
|
| Linear
Shrinkage, % |
|
|
< 0.1 |
|
| Viscosity,
23 C, cPs |
Brookfield |
|
15,000 |
|
| Appearance |
|
|
Reddish
Brown |
|
| Typical
Values Shown are not intended for use in the
preparation of specifications |
|
Contact RubberWorks
for the complete Wacker Data Sheet which describes
this Elastosil product |
|
RT 621 is supplied in
kits consisting of A and B Components - Pail Kit Sizes
Available: 30 kg |
 Call RubberWorks for the detailed Wacker
Elastosil Data Sheet |
