Description
This Shore-hardness 14A, translucent platinum-cure silicone is easy to use with a 1A:1B mixing ratio by volume, eliminating the need for a weighing scale. With it's low viscosity, vacuum degassing is not required for most applications. The pot life is 3 minutes, and the cure time is 9 minutes at room temperature.
Features
- Cures to a soft, strong rubber that is tear-resistant and exhibits very low long-term shrinkage.
- Suitable for casting wax, gypsum, resins, concrete, and other materials.
- Can be thickened with THI-VEX™ thickener for brush-on applications.
- Color effects can be achieved by adding Silc Pig™ pigments or Cast Magic™ powders.
- Heat resistant up to 232°C (450°F) and suitable for casting low-temperature melt metal alloys.
- Skin safe and certified by an independent laboratory.
- Note: Will not cure against surfaces containing sulfur, even when sealed.
Technical Properties
- Mix Ratio By Volume: 1A:1B
- Mix Ratio By Weight: 1A:1B
- Pot Life: 3 minutes
- Cure Time: 9 minutes
- Shore Hardness: 14 A
- Specific Gravity: 1.08 g/cc
- Specific Volume: 0.92 cm³/g
- Color: Translucent
- Tensile Strength: 2.9 MPa (420 psi)
- 100% Modulus: 324 kPa (47 psi)
- Elongation @ Break: 490%
- Die B Tear Strength: 15.8 kN/m (90 pli)
- Useful Temperature (max): 232°C (450°F)
- Useful Temperature (min): -54°C (-65°F)
- Mixed Viscosity: 11,000 mPa·s
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 working and cure time and shelf life.
Cure Inhibition
Silicone rubber may be inhibited by contaminants such as latex, sulfur clays, certain woods, newly cast polyester, epoxy, tin cure silicone, or urethane rubber. Test compatibility by applying a small amount to a non-critical area. If gummy or uncured, inhibition has occurred. Use a clear acrylic lacquer to seal surfaces, allowing it to dry thoroughly before applying rubber.
Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.
Note: Even with a sealer, platinum silicones will not work with modeling clays containing heavy amounts of sulfur. Do a small scale test for compatibility before using on your project.
Applying A Release Agent
A release agent can ease demolding. Ease Release™ 200 is recommended. Test suitability for your project with a small application.
Measuring & Mixing
Pre-mix Part A and Part B separately. Mix thoroughly after combining in a 1A:1B ratio by volume or weight, scraping sides and bottom of the container.
Optional: Vacuum Degassing
Vacuum degassing is optional but helps remove entrapped air. Vacuum for 2-3 minutes at 29 inches of mercury, leaving room for expansion.
Pouring
Pour mixture in a single spot at the lowest point. Let it level off at least 1.3 cm (1/2 inch) over the highest model point.
Curing
Allow to cure for 9 minutes at room temperature before demolding.
Heat Curing
Demold time can be reduced with mild heat. Place in a hot box or oven at 60°C (140°F) to reduce time, depending on mold thickness.
Mold Performance & Storage
The mold's life depends on usage. Clean with soap solution and dry before storing. Assemble multi-part molds and store on a level surface in a cool, dry place.
