Description
This tin-cured silicone rubber compound is known for its exceptional working properties and long library life. It features an exclusive catalyst that extends shelf life and can be pigmented with silicone colorants. The pot life is 60 minutes, curing overnight at room temperature. Vacuum degassing is recommended to remove entrapped air.
Features
- Lower viscosity Part A for easier mixing and vacuum degassing.
- Extra-long working time of 60 minutes for large or multiple molds.
- Reproduces fine detail for industrial and art applications.
- Can be thickened for brush-on applications.
- Compatible with various casting materials without a release agent.
Technical Properties
- Mix Ratio By Weight: 100A:5B
- Pot Life: 60 minutes
- Cure Time: 24 hours
- Shore Hardness: 25 A
- Specific Gravity: 1.18 g/cc
- Specific Volume: 0.85 cm³/g (23.5 cu. in./lb.)
- Color: Purple
- Tensile Strength: 3.98 MPa (577 psi)
- 100% Modulus: 552 kPa (80 psi)
- Elongation @ Break: 375%
- Die B Tear Strength: 22.8 kN/m (130 pli)
- Useful Temperature Range: -54°C to 204°C (-65°F to 400°F)
- Volume Resistance: 8.29E+11 ohm
- Volume Resistivity: 5.83E+13 ohm/cm
- Dielectric Constant, 100Hz: 3.29
- Dielectric Strength: 330 volts/mil
- Dissipation Factor, 100Hz: 0.005
- Shrinkage: 0.001 mm/mm
- Mixed Viscosity: 25,000 cps
Instructions
Safety
Use in a well-ventilated area. Wear safety glasses, long sleeves, and rubber gloves. Use vinyl gloves only, as latex gloves will inhibit the cure.
Storage
Store and use at room temperature (23°C/73°F). Warmer temperatures reduce shelf life. Use promptly.
Sealer / Release Agent
May be inhibited by sulfur-based clays. Test compatibility with a small-scale test. Apply a barrier coat of clear acrylic lacquer if needed. Use a proven release agent.
Measuring & Mixing
Pre-mix Part B thoroughly. Weigh Part A & B using a gram scale. Mix for 3 minutes, scraping sides and bottom. Vacuum degas to remove air.
Pouring / Curing / Post Curing
Pour mixture in a single spot at the lowest point. Allow to cure overnight (at least 16 hours) at room temperature. Post cure for 4 hours at 65°C (150°F) to eliminate residual moisture and alcohol. Allow mold to cool before use.
Thickening for Brush-on Application
Use a thickener for vertical applications. Apply thin coats, allowing each to become tacky before the next. Final thickness should be at least 9.5 mm (3/8 inch).
Accelerating Cure
Use an accelerator to reduce cure time. Note that working time is reduced with more accelerator.
Thinning
Silicone Thinner™ can lower viscosity and increase pot life, but reduces tear and tensile strength. Do not exceed 10% by weight.
Mold Performance & Storage
Clean molds with soap solution and dry before storage. Store on a level surface in a cool, dry environment.
