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Product information "ALWA SIL SH System "
ALWA SIL SH System
Silicone rubber ALWA SIL SH 22 and SH 33 are silicone impression materials. These materials have extremely high mechanical values. In addition, they are very fast to handle and very easy to handle as well.

The two-component silicone rubbers cure at room temperature. After mixing the two components, a low viscosity liquid develops, which crosslinks to a resistant and rubber elastic material. During the crosslinking, no exothermic heat is developed. When 1 – 3 % thixotropic agent is added per component, a spreadable mixture is obtained.

Application: Foundries
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Product brochure:
CASTING RESIN FOR ALWA SIL

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Characteristic SH22 SH33
Silicone type  Addition Addition
Hardness (shore A)
Test time: after 12 hours
Test specimen: 65 x 65 x 6 mm
~ 21 – 23 ~ 30 – 34
Mixing ratio (%) 100:100 100:100
Colour Blue Translucent, red, blue, green
Pot life at 22 °C – 24 °C (min.) ~ 18 – 25 ~ 20 – 25
Time to demoulding at 24 °C (hrs.) ~ 2 – 3 ~ 3 – 4
Viscosity (mPa s) ~ 3.500 ± 1.000 ~ 4.500 ± 1.000
Tear-strength (kgf/cm) ~ 18 – 31 ~ 11 – 17
Tensile strength (kgf/cm²) ~ 45 – 75 ~ 60 – 90
Elongation (%) ≥ 400 ≥ 350
Shrinkage (%) ≤ 0.1 ≤ 0.3
Temperature resistance (°C) ~ 220 ~ 220

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