High-Strength Tin-Cured LSR for Architectural Molds – Durable & Cost-Effective

Industrial Grade Tin-Cure Liquid Silicone Rubber (LSR)

RTV-2 tin-cured liquid silicone rubber (LSR) delivers exceptional performance in producing high-durability molds for concrete, plaster, and silicone-based architectural components. Engineered for precision and resilience, it is the optimal choice for fabricating decorative elements such as patterned wall tiles, ornate Roman columns, and intricate relief panels.

Key Properties of Tin-Cured LSR

1. Mechanical Resilience
- Tear Strength: 45–60 kN/m (ASTM D624) for 500+ demolding cycles, ideal for intricate geometries like floral bas-reliefs or modular tile patterns.
- Flexural Endurance: Shore A 20–50 hardness range balances flexibility and structural support for large-scale concrete molds.

2. Efficient Processing
- Room-Temp Cure: 4–24 hr cure time (adjustable with catalysts) vs. platinum LSR’s 1–2 hr heat requirement.
- Low-Energy Production: No autoclaves needed; compatible with hand lay-up or vacuum casting for on-site fabrication.

3. Economic Viability
- Cost Savings: 30–40% cheaper than platinum-cure LSR at comparable volumes (bulk pricing <$25/kg).
- Extended Storage: 12-month shelf life in sealed containers at 15–25°C, reducing procurement frequency.

4. Environmental Stability
- Chemical Resistance: Withstands pH 3–11 exposure (e.g., alkaline concrete leachate, cleaning acids).
- Thermal Performance: Stable from -40°C to 200°C (±2% dimensional change), suitable for precast steam curing.

5. User Safety & Precision
- Non-Toxic Formulation: Meets EU REACH standards for manual handling; VOC emissions <50 ppm.
- Near-Zero Shrinkage: 0.1–0.2% linear shrinkage preserves sub-millimeter details (e.g., stone vein replication).

Applications in Architectural Mold Making

Comparison with Alternative Materials
- vs. Platinum LSR:
- Pros: Lower cost, better air release for bubble-free molds.
- Cons: Limited continuous heat resistance (>200°C degrades tin catalysts).

- vs. Polyurethane:
- Pros: 3× longer lifespan, superior chemical resistance to wet concrete.
- Cons: 20% slower cure time; requires mold release agents for PU master models.- vs. Platinum Silicone: Lower upfront cost but less suitable for high-heat applications (>200°C).
- vs. Polyurethane Rubber: Superior flexibility and longer lifespan, though slightly slower curing.

Shenzhen Hanast New Materials Co., Ltd. is a subsidiary of Shenzhen Kanglibang Technology Co., Ltd. The brand "Hanast", established in 2019, has been dedicated to expanding the international market. The company is committed to the research and development and innovation of new adhesive materials, integrating R&D, manufacturing, sales and service. It has developed into a national "Little Giant" enterprise specializing in "Specialized, Precision, Unique and Innovative" and a national high-tech enterprise. With a modern production base of 40,000 square meters, the company has become a professional service provider for one-stop customized packaging and heat dissipation material solutions through its independent R&D and production capabilities.

The company has been awarded multiple national invention patents and utility model patents. Its core product, "silicone pressure-sensitive adhesive", has been recognized as a "Guangdong Province Famous and High-tech Product".

Relying on the strong technical strength of Kanglibang, the company has gathered a group of high-quality scientific research talents and a technical team with over ten years of practical experience. The products are deeply trusted by customers and have established cooperative relationships with many world-renowned enterprises such as ABB, Apple, Google, China Southern Power Grid, Foxconn, ZTE, BYD, and Wolong Nuclear Materials. The company's products comply with ROHS standards and have passed authoritative certifications such as SGS, FDA, LFGB, and China Environmental Label.