Silicone
High Strength RTV2 Silicone
Tear Resistant Silicone
Long-lasting molding silicone with high tear strength and chemical stability, ideal for serial production casting.
| Compatible Technologies | Vacuum Casting |
| Tensile Strength | 7.5 MPa |
| Heat Deflection Temperature (HDT) | 200°C |
| Hardness | 31 (Shore A) |
| Available Colors | Gray |
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Why Choose High Strength RTV2 Silicone?
High Strength RTV2 Silicone is the heart of industrial vacuum casting processes. Offering superior tear resistance and dimensional stability compared to standard silicones, this professional mold-making material replicates the finest details (down to microns) of the master pattern. It is essential for producing parts with undercuts and complex geometries, ensuring the mold flexes without tearing over repeated uses. At ProtoDep, we use this premium silicone to guarantee that your cast parts have perfect surface finishes and tight tolerances.
Advantages
High Tear Resistance: Prevents mold tearing during the demolding of complex parts with deep undercuts, extending mold life.
Micron Precision: Perfectly replicates leather grains, text textures, and fine lettering from the master model.
Low Shrinkage: With a shrinkage rate of less than 0.1%, it ensures strict dimensional accuracy for cast resin parts.
Flexibility: Provides the ideal shore hardness to release rigid parts without damage.
Limitations
Chemical Life: Aggressive resins (such as certain clear or high-temp types) can degrade the silicone surface over time, limiting the mold’s yield (Avg. 20-30 shots).
Curing Time: Requires 12-24 hours to fully cure and reach mechanical properties, which dictates the initial setup lead time.
Mechanical Properties
Metric Measurements
Elastic Modulus
GPa
Elongation at Break
700 %
Density
1.12 g/cm³
RTV2 Mold Silicone FAQ
What is High Strength RTV2 Silicone used for?
High Strength RTV2 Silicone is primarily used to manufacture flexible molds for Vacuum Casting polyurethane resins. Additionally, RTV2 silicone molds are preferred for casting materials like concrete, plaster, or wax.
How many parts can be cast from one RTV2 silicone mold?
While it depends on the chemical nature of the casting resin and part geometry, a mold made with High Strength RTV2 Silicone typically yields between 20 to 30 high-quality parts.
What is the shrinkage rate of RTV2 Silicone?
The platinum-based High Strength RTV2 Silicones we use have negligible shrinkage rates (typically <%0.1). This ensures no dimensional discrepancy between the master model and the final cast part.
Are RTV2 silicone molds suitable for models with undercuts?
Yes. The primary advantage of RTV2 Silicone is its flexibility. Models with complex undercuts and details can be easily demolded by stretching the RTV2 silicone mold without damaging the part.
Is RTV2 Silicone food safe?
Our standard RTV2 Silicones are for industrial use. However, if your project requires Food Grade compliance, we can manufacture molds using specific certified platinum-based RTV2 Silicone.
What determines the lifespan of a silicone mold?
The lifespan of an RTV2 silicone mold is determined by the chemical aggressiveness of the casting material, the complexity of the part, and casting frequency. We maximize this lifespan by using High Strength RTV2 Silicone.
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