ALWA SIL SH22 & SH33

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.

Area of application

  • Flexible casting moulds
  • Copy moulds
  • Moulds with undercuts
  • Polyurethane casting moulds
  • Concrete casting moulds

Productvideo ALWA SIL SH22 & SH33

Technical data at RT:

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

Downloads

Produktbroschüre: ALWA SIL