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Our Platinum-Cured Silicone Rubber for Cultural Stone Molds is a high-performance, low-shrinkage material engineered specifically for architectural and decorative applications where texture accuracy and durability are critical. Leveraging advanced platinum-catalyzed addition cure technology—a process that eliminates toxic byproducts and ensures uniform cross-linking—this rubber achieves zero chemical shrinkage during curing. This precision enables exact replication of intricate stone textures, from the delicate veining of marble to the rough grain of sandstone and even fossilized patterns in natural rock. Compliant with ASTM C1375 standards for construction materials, it maintains structural integrity across extreme weather conditions (-60°C to 250°C) and resists degradation from environmental pollutants, making it the ideal choice for outdoor stone molds in landscaping, heritage restoration, and commercial building facades.
Parameter | Value |
Viscosity @ 25°C | 220,000 ± 10% mPa·s |
Cure Time @ 25°C | 6-8 hours |
Hardness | 40 Shore A |
Tensile Strength | ≥5.5 MPa |
Tear Strength | ≥23 kN/m |
Shrinkage | ≤0.1% |
Extreme Weather Resistance: Formulated to withstand prolonged UV exposure (preventing color fading and brittleness), freeze-thaw cycles (resisting cracking in sub-zero temperatures), and saltwater corrosion (ideal for coastal projects). This durability extends mold lifespan by 30% compared to peroxide-cured rubbers, reducing replacement frequency in outdoor applications .
High-Detail Reproduction: Its optimized viscosity allows deep penetration into micro-textures (down to 0.02mm detail resolution), capturing fossil imprints, chisel marks, and natural stone pores with 99.9% accuracy. This makes it suitable for replicating heritage artifacts where historical authenticity is paramount .
Chemical Inertness: Resists degradation from cement alkalis, epoxy resins, acrylic solvents, and common cleaning agents. This stability ensures consistent performance across 500+ casting cycles, maintaining texture fidelity even with repeated use in industrial concrete production .
Easy Demolding: The non-stick surface minimizes adhesion to cast materials (concrete, plaster, resin), reducing manual labor for mold release and lowering the risk of damaging both the mold and the cast piece. Its self-releasing properties eliminate the need for messy external release agents, streamlining production workflows.
Architectural Decoration: Produces imitation stone panels for building exteriors, ornamental columns for classical architecture, and garden statues with lifelike textures, enhancing aesthetic appeal in residential and commercial spaces.
Heritage Restoration: Replicates antique stone carvings, historical friezes, and monument details for museum exhibits, heritage site repairs, and cultural preservation projects, ensuring historical accuracy.
Industrial Casting: Creates durable molds for concrete pavers, GRC (glass-reinforced concrete) facade elements, and terrazzo tiles, supporting large-scale construction with consistent quality.
DIY Craft: Empowers hobbyists to make resin art molds, soapstone replicas, and custom home decor (e.g., stone-effect planters, wall art), combining professional-grade results with user-friendly processing.
Each batch undergoes rigorous testing, including ASTM D412 tensile strength verification, ISO 37 tear resistance analysis, and accelerated weathering tests (1,000 hours of UV exposure to simulate 10 years of outdoor use). Certified RoHS and REACH compliant, with SGS reports confirming zero detectable heavy metals (<1ppm) and absence of harmful phthalates. Full traceability is guaranteed through batch-specific Certificates of Conformity, documenting raw material sources and test results.
