Hardness 40 Platinum Cure Liquid Silicone Rubber for Artificial Stone Mold Wall Tile

Hardness 40 Platinum-Cure (Addition) Liquid Silicone Rubber for Artificial Stone Mold & Wall Tile

This platinum-cure (addition) liquid silicone rubber is a two-component translucent system mixed at a 1:1 ratio by weight, supplied at the Hardness 40 Shore A grade. It cures at room temperature or with heat acceleration, offering low viscosity, good fluidity and reliable bubble release for precise mould reproduction. The cured silicone is food-grade, non-toxic, odourless and non-corrosive (FDA / MSDS / RoHS), with excellent physiological inertness, waterproof and ageing resistance, high tensile strength and toughness, temperature resistance from −50 °C to 200 °C, and extremely low shrinkage (≤ 0.1%) for high-precision artificial stone moulds and wall tile applications.

Key Features of Liquid Silicone Rubber

• Hardness 40 Shore A grade with 1:1 mix ratio (A:B by weight); 30–40 min pot life
• Translucent, food-grade: FDA, MSDS, RoHS certified; non-toxic, odourless, non-corrosive
• Low viscosity (6000 ± 500 mPa·s) for easy mixing and bubble removal; good fluidity for pouring
• Room-temperature cure (3–4 h) or heat-accelerated cure (80–100 °C, ≤ 20 min)
• High tensile strength (6.0 MPa), tear strength 14 kN/m and elongation up to 450%
• Operating temperature range −50 °C to 200 °C; excellent ageing and ozone resistance
• Extremely low shrinkage (≤ 0.1%) with no low-molecule release during cure; high precision

Typical Applications of Liquid Silicone Rubber

• Artificial stone mould making and wall tile production
• Resin, cement component, cultural stone and gypsum craft moulds
• High-grade / special-use mould making — concrete, high-wear rigid moulds
• General RTV mould applications requiring food-grade safety and high precision

Technical Data of Liquid Silicone Rubber

Mixing & Application Instructions

1. Pre-mix: Stir Components A and B thoroughly before use to ensure homogeneity.
2. Weighing: Accurately weigh A and B in a 1:1 ratio by weight using a precision scale.
3. Mixing: Mix A and B thoroughly for 2–3 minutes until uniform; scrape container walls and bottom.
4. Degassing: For bubble-free moulds, degas under vacuum to remove entrapped air.
5. Pouring: Pour into the clean, dry mould frame within the 30–40 min pot life; ensure full coverage.
6. Curing: Cure at room temperature for 3–4 h, or heat at 80–100 °C for ≤ 20 min. Demould after full cure.

Packaging

• Component A: 10 kg / 20 kg / 25 kg iron or plastic drum
• Component B: 10 kg / 20 kg / 25 kg iron or plastic drum
• Kit (A+B): 20 kg / 40 kg / 50 kg per set

Storage & Shelf Life

• Store in original, tightly sealed containers in a cool, dry, well-ventilated area below 25 °C.
• Protect from direct sunlight, moisture, heat and extreme temperatures.
• Shelf life: 12 months from date of manufacture when stored unopened and properly sealed.

About Our Company

The company was established in 2006 and is headquartered in Shenzhen, specializing in the research and development of new adhesive materials. It is a national-level specialized and innovative small giant enterprise. The company's factory in Xinhui, Jiangmen, Guangdong covers 60 acres with a total investment of 600 million. It has over 40 professional R&D personnel with more than 10 years of rich practical experience, led by researchers from the Chinese Academy of Sciences, all of whom are from domestic and international chemical engineering universities. The company maintains partnerships with several Fortune 500 companies such as Apple, BYD, and China Aerospace.