PlatSil® 73-20 Silicone Rubber

PlatSil® 73-20 Silicone Rubber is a two-part, platinum-catalyzed, liquid silicone system that cures (RTV) to a blue translucent, Shore A20 rubber. Compared to other silicones in the PlatSil® 73-Series line, this option sets quickly with a demold time of 1 hour (at room temperature). The transparency of PlatSil® 73-20 is useful for molds that need to be cut after cure – parting lines can be better determined because the model is visible. This is a pourable rubber, but it can be easily thickened with PlatThix Liquid Thickener or Fumed Silica for brush-on application.

FOR INDUSTRIAL/PROFESSIONAL USE ONLY.

 

Technical Specifications

• Mix Ratio by Weight: 1A:1B
• Shore Hardness: A22
• Pour Time: 5 min.
• Demold Time: 1 hr.
• Cured Color: Blue, Translucent
• Mixed Viscosity: 3,000 cP
• Specific Volume: 25 in³/lb
• Specific Gravity: 1.1
• Elongation: 460 %
• Tensile Strength: 230 psi
• Die B Tear Strength: 45 pli
• Die T Tear Strength: 17 pli
• Cure Inhibition: Contamination from sulfur (e.g., sulfur-based clay), amines, tin compounds, cured polyester resin, some paints and some silicone rubbers may inhibit surface cure of platinum-cured rubbers.