Product Type |
|
|
Mixed Viscosity | 1,800 cps | 21,000 cps |
Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
Pot Life | 30 minutes | 60 minutes |
Cure Time | 16 hours | 24 hours |
Color | Clear Amber | Blue |
Tensile Strength | 400 psi | 550 psi |
100% Modulus | 82 psi | 180 psi |
PMC™-121 30/WET | Smooth‑Sil™ 936 | |
---|---|---|
Product Type |
|
|
Mixed Viscosity | 1,800 cps | 21,000 cps |
Mix Ratio By Volume | 1A:1B | — |
Mix Ratio By Weight | 1A:1B | 100A:10B |
Pot Life | 30 minutes | 60 minutes |
Cure Time | 16 hours | 24 hours |
Shore A Hardness | 30 | 36 |
Specific Gravity | 1.04 g/cc | 1.21 g/cc |
Specific Volume | 26.7 cu. in./lb. | 22.9 cu. in./lb. |
Color | Clear Amber | Blue |
Die B Tear Strength | — | 110 pli |
Die C Tear Strength | 75 pli | — |
Tensile Strength | 400 psi | 550 psi |
Elongation @ Break | 1,000 % | 500 % |
100% Modulus | 82 psi | 180 psi |
Shrinkage | < .001 in. / in. | <0.001 in. / in. |
Useful Temperature (min) | — | -65 °F |
Useful Temperature (max) | — | 450 °F |
The PMC™-121 Series urethane rubbers feature convenient one-to-one by volume mix ratios. PMC™-121/30 Wet is exceptionally strong and abrasion resistant for soft urethane mold rubbers. It exudes oil that aids in demolding hard plasters and concrete.
Smooth-Sil™ Platinum Silicones cure at room temperature with negligible shrinkage. With different hardnesses to choose from, Smooth-Sil™ products offer tremendous versatility and are suitable for making production molds of any configuration, large or small. These silicones exhibit good chemical, abrasion and heat resistance. Materials such as plasters, concrete, wax, low-melt metal alloys or resins (urethane, epoxy or polyester) can then be cast into these silicone rubbers without a release agent.
Smooth-Sil™ 936 is a lower viscosity platinum silicone rubber (21,000 cps). It is easier to mix, vacuum degas and pour. Smooth-Sil™ Platinum Silicones are used for rapid prototyping, wax casting (foundries and candle makers), architectural restoration and for casting concrete.