FX244-1 – Oil-Bleeding Silicone Rubber for Precision Molding
FX244-1 is a two-component, addition-cure liquid silicone rubber (LSR) engineered for high-precision molding applications. With a mixing ratio of A:B = 10:1, it cures at room temperature or under heat to form a high-strength, highly elastic silicone rubber with excellent dimensional stability and durability.
A standout characteristic of FX244-1 is its oil-bleeding self-releasing property, which enables easy demolding without external release agents. Combined with low viscosity, high transparency, and strong mechanical performance, FX244-1 is ideal for molds that require fine detail reproduction and long service life.
Key Functions
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Self-Releasing Mold Surface
Oil-bleeding behavior improves demolding efficiency and reduces damage to molds and cast parts. -
High-Fidelity Detail Replication
Low viscosity enables excellent flow into fine features and complex geometries. -
Dimensional Stability
Ultra-low volume shrinkage (~0.01%) ensures accurate mold dimensions. -
Mechanical Durability
High elongation and tear strength support repeated use and long mold life. -
Thermal & Electrical Reliability
Maintains performance from -45°C to 200°C and offers excellent electrical insulation.
How It Works
FX244-1 functions through an addition-curing (platinum-catalyzed) crosslinking reaction:
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Mixing (A:B = 10:1)
The silicone base (Part A) and curing agent (Part B) are accurately weighed and mixed until homogeneous. -
Degassing
Due to its low viscosity, trapped air bubbles can be easily removed under vacuum, ensuring void-free molds. -
Curing & Crosslinking
At room temperature or under heat, the silicone undergoes a controlled crosslinking reaction, forming a flexible yet high-strength elastomer. -
Self-Release Mechanism
During and after curing, a controlled oil-bleed effect develops on the surface of the cured silicone, providing natural release properties that reduce adhesion to cast materials and mold masters. -
Long-Term Performance
Once cured, the silicone maintains elasticity, dimensional accuracy, and mechanical strength over repeated casting cycles and wide temperature ranges.
Typical Applications
FX244-1 is well-suited for applications requiring precision, durability, and easy demolding, including:
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Precision Mold Making
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Silicone molds for casting resin, PU, epoxy, wax, and plaster
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Molds requiring fine surface detail and high transparency
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Industrial Tooling & Prototyping
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Master molds for short-run or pilot production
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Prototyping of industrial and technical components
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Art, Craft & Decorative Casting
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Transparent and decorative molds with high aesthetic quality
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Electrical & Technical Components
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Flexible insulating molds and parts requiring high dielectric strength
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Benefits Over Traditional Products
Compared with conventional rubber, silicone, or non-oil-bleeding mold materials, FX244-1 offers clear advantages:
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No External Release Agent Required
Reduces processing steps, cost, and surface contamination. -
Superior Detail Accuracy
Outperforms traditional high-viscosity rubbers in reproducing fine details. -
Lower Shrinkage
Ensures better dimensional accuracy than many standard silicone or rubber systems. -
Longer Mold Life
High elasticity and tear strength reduce cracking and wear over repeated use. -
Wider Temperature Resistance
Performs reliably in applications where conventional rubbers may harden or degrade. -
Cleaner, More Efficient Processing
Addition-cure system avoids by-products and supports consistent, repeatable results.
Storage & Shelf Life
FX244-1 should be stored in a cool, dark environment between 14–34°C. When kept in original, unopened containers, it has a shelf life of 9 months. Contact with sulfur, amines, phosphorus compounds, and certain metal ions should be avoided to prevent curing inhibition.
FX244-1 is an ideal solution for precision mold making, offering reliable processing, excellent mechanical properties, and consistent performance for industrial and technical applications.
