Description
PlatSil® FS-20 is a fast-setting, two-part, platinum-catalyzed silicone rubber. It cures at room temperature to a milky white rubber with a Shore hardness of OO66/A20. This product features a simple 1A:1B mix ratio, usable by both weight and volume.
- Mix Ratio: 1A:1B by weight or volume
- Shore Hardness: A20
- Pour Time: Approximately 8 minutes
- Demold Time: Approximately 25 minutes
- Cured Color: Milky White
- Mixed Viscosity: 3,800 cP
- Specific Volume: 24.9 in³/lb
- Specific Gravity: 1.11
- Elongation: 626%
- Tensile Strength: 467 psi
- Die B Tear Strength: 148.2 pli
- Die T Tear Strength: 52.8 pli
The fast demold time of approximately 25 minutes allows for quick turnaround of molds and parts, while the extended pour time of about 8 minutes provides ample time for mixing and pouring. Heat can be applied to further accelerate the curing process.
Cure Inhibition: Be cautious of contamination from sulfur-based clays, amines, tin compounds, cured polyester resin, certain paints, and some silicone rubbers, as they may inhibit the surface cure of platinum-cured rubbers.