Description
Equinox™ 38 MEDIUM silicone putty is part of the Equinox series, featuring a platinum catalyst. These silicone putties are easy to mix by hand and can be applied to various surfaces.
The putty is mixed in equal amounts (1A:1B) by volume.
Features
- Working time of 4 minutes
- cure time of 30 minutes.
- Low shrinkage
- strong cured rubber with high tensile strength.
- Durable
- resistant to high temperatures
- suitable for casting low-temperature melt metal alloys
- Resists cure inhibition
- food safe, suitable for culinary applications
Applications
Used for making fast mold impressions from almost any surface, orthotics/orthopedic applications, equine hoof repair, jewelry making, and more.
Technical Properties
- Mix Ratio By Volume: 1A:1B
- Mix Ratio By Weight: 1A:1B
- Working time: 4 minutes
- Cure Time: 30 minutes
- Shore Hardness: 38 A
- Specific Gravity: 1.25 g/cc
- Specific Volume: 0.8cm³/g
- Tensile Strength: 3.58 MPa
- 100% Modulus: 820 kPa
- Color: Light Purple
- Elongation @ Break: 430%
- Die B Tear Strength: 24.5 kN/m
- Shrinkage: 0.001 mm/mm
- Mixed Viscosity: Putty
Instructions
Safety
Use in a well-ventilated area. Wear safety glasses, long sleeves, and vinyl gloves.
N.B. strictly use vinyl gloves, as latex gloves will inhibit the cure.
Storage
Store and use at room temperature (23°C). Warmer temperatures reduce working and cure time and can shorten shelf life.
Cure Inhibition
Inhibition may occur with contaminants like latex, tin-cure silicone, sulfur clays, and certain wood surfaces. Test compatibility on a non-critical area.
Seal the object with a clear acrylic lacquer to prevent inhibition. Allow the sealer to dry before applying the rubber.
When in doubt, a small test application to determine suitability for your project is recommended.
When working with modeling clays that contain heavy amounts of sulfur, even a sealer will not suffice. Do a small scale test for compatibility before starting your project.
Applying a Release Agent
A release agent can make demolding easier. Use Ease Release™ 200 for silicone rubber molds. Lightly brush the release agent over all surfaces, follow with a light mist, and let dry for 30 minutes.
Mixing and Applying
Mix by hand, using vinyl gloves if desired. Dispense equal amounts of Part A and Part B, knead to a uniform color, and apply quickly.
Curing
Allow to cure at room temperature before removing from the model.
Applying heat will speed up curing.
Conduct a small test application if performance is in question.
Applying a Support Shell
Putty molds may need a support shell made of Plasti-Paste II™ or Matrix™ NEO™ with chopped fiber.
Post Curing
Do not cure below 18°C.
Optional post-curing at 80°C for 2 hours and 100°C for 1 hour can enhance properties.
Cool to room temperature before use.
Using The Mold
Silicone molds naturally release well initially. Over time, mold lubricity may decrease.
No release agent is needed for wax or gypsum.
Use Ease Release™ 200 for polyurethane, polyester, and epoxy resins to prevent mold degradation.
Mold Performance & Storage
Mold life depends on it's use. Abrasive materials like concrete can erode detail, while non-abrasive materials like wax do not. Clean molds with soap solution and dry before storage. Assemble multi-part molds and store on a level surface in a cool, dry place.
