Smooth-On Mold Star 20T Silicone Mold Making Rubber - Trial Unit 2 lbs

Description

Smooth-On Mold Star 20T
Size: Trial Unit 2 lbs / 2 Pints
Description
Mold Star 20T is an easy to use Shore 20A translucent platinum silicone that is mixed 1A:1B by volume (no weighing scale necessary). It features a relatively low viscosity and vacuum degassing is not required for most applications. Pot life is 6 minutes and cure time is 30 minutes at room temperature..
Mold Star 20T cures in to a soft, strong rubber that is tear resistant and exhibits very low long term shrinkage. Molds made with Mold Star will last a long time in your mold library and are good for casting wax, gypsum, resins, concrete and other materials. An infinite number of color effects can be achieved by adding Silc Pig silicone pigments.
Mold Star 20T is heat resistant up to 450F (232C) and is suitable for casting low-temperature melt metal alloys.
Note: This product will not cure against surfaces containing sulfur, even when sealed.
Mix Ratio By Volume
1A:1B
Mix Ratio By Weight
1A:1B
Specific Gravity
1.08 g/cc
Specific Volume
25.6 cu. in./lb.
Pot Life
6 minutes
Cure Time
30 minutes
Color
Translucent
Shore Hardness
20 A
Tensile Strength
420 psi
100% Modulus
47 psi
Elongation @ Break
740 %
Die B Tear Strength
90 pli
Shrinkage
<.001 in. / in.
Mixed Viscosity
11,000 cps