• Item Name: INSULCAST MRTV 9
• Manufacturer: ITW Performance Polymers
• Technologies: Addition-cure RTV silicone with high tear strength and high elongation
• Color: Black (Part A), Clear (Part B)
• Cure Type: Room-temperature or accelerated heat cure
• Package Size: Contact to Techniq VN for details.
• Shelf Life: 6 months
INSULCAST MRTV 9 is a high tear strength, high elongation addition-cure RTV silicone rubber designed for mold making. It features low shrinkage, excellent detail reproduction, and flexibility, making it ideal for intricate molds. The system consists of Part A (base) and Part B (curing agent), which are mixed prior to use, and it cures at room temperature or elevated temperatures for faster results.
High-precision mold making for prototyping and production
Casting of resins, waxes, and low-melt metals
Reproduction of intricate details and textures
Flexible molds requiring high tear strength
Applications with wide service temperature range
Before Mixing / Base and Curing Agent
| Property | Part A | Part B | Test Method |
|---|---|---|---|
| Color, Visual | Black | Clear | – |
| Viscosity @ 25°C, cP | 100,000 | <1,000 | ASTM D 1084 |
| Specific Gravity | 1.15 | 1.00 | – |
| Mix Ratio (by weight) | 100:10 | – | – |
| Mixed Viscosity, cP | 50,000 | – | ASTM D 1084 |
| Shelf Life @ 25°C, months | 6 | – | – |
| Pot Life @ 25°C, 100 g, hrs | 1.5–2.0 | – | – |
Cured Properties
| Property | Value | Test Method |
|---|---|---|
| Hardness, Shore A | 24 | ASTM D 2240 |
| Tensile Strength, psi | 500 | ASTM D 412 |
| Tensile Elongation, % | 1000 | ASTM D 412 |
| Tear Strength, Die B, lb/in | 117 | ASTM D 624 |
| Tear Strength, Die C, lb/in | 125 | ASTM D 624 |
| Coefficient of Thermal Expansion, °C | 4.2×10⁻⁴ | – |
| Thermal Conductivity, BTU-in/(ft²)(hr)(°F) | 1.8 | – |
| Thermal Conductivity, W/m·K | 0.26 | – |
| Service Temperature, °C | -55 to +204 | – |
| Dielectric Strength, volts/mil | 550 | ASTM D 149 |
| Dielectric Constant, 1 kHz | 2.94 | ASTM D 150 |
| Dissipation Factor, 1 kHz | 0.002 | ASTM D 150 |
| Volume Resistivity, ohm·cm | 1.6×10¹⁵ | ASTM D 257 |
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