PlatSil 73-20 Precision Silicone is a ultra low viscosity, high elongation, 1:1 RTV Silicone Rubber, that has a 5 minute working time and a less than a hour demold time at 77ºF. It cures a Translucent grey color.
PlatSil® 73-20 Precision Silicone is recommended for evaluation as a mold material for polyester, epoxy and polyurethane resins, as well as for waxes and many other materials. PlatSil® 73-20 offers advantages over tin-catalyzed systems in certain applications because on curing it doesn’t shrink, it doesn’t produce alcohol (like tin-catalyzed silicones) which can inhibit urethane castings.
Mix Ratio: 1A:1B by Weight or Volume
Durometer: Shore A 22
Working Time: 5 Minutes
Demold Time: < 1 Hour at ºF
Color: Transparent Grey
Mixed Viscosity: 2,000 cP
Shrinkage Upon Cure: Nil