UL 94 V-0 25 Shore A Platinum Cure Silicone Rubber with 1:1 Mix Ratio for Concrete Mold

Fire Resistant UL 94 V-0 Platinum Cure Silicone Rubber for GRC & Architectural Concrete Molds

This 25 Shore A addition-cure RTV silicone rubber is engineered for architectural concrete molds, GRC (Glassfiber Reinforced Concrete) casting and cultural stone production. The fire resistant UL 94 V-0 formulation meets international flame retardancy standards, delivering superior safety for construction and industrial applications.

Key Features

• Fire Resistant UL 94 V-0 - Flame retardant formulation compliant with international safety standards for construction use
• Optimal 25 Shore A Hardness - Ideal balance of rigidity and flexibility for large concrete molds, preventing deformation under heavy material loads
• High Tear Strength 19 kN/m - Superior durability for repeated demolding cycles in high-volume architectural production
• Ultra-Low Shrinkage ≤0.1% - Precise mold reproduction preserving fine surface details of cultural stone and decorative panels
• Easy 1:1 Mix Ratio - Accurate two-part mixing for both manual pouring and automated dispensing systems
• Wide Temperature Range -40°C to +230°C - Stable performance for cold climate outdoor casting and high-temperature resin applications
• Non-Toxic & Eco-Friendly - RoHS and REACH compliant, platinum-catalyzed curing generates no byproducts

Technical Specifications

Typical Applications

• Large Concrete Component Molds
• Architectural Cultural Stone Casting
• GRC Panel & Facade Element Molds
• Concrete Paver & Block Production
• High-Gloss Epoxy Resin Casting

As a direct factory manufacturer, we offer custom OEM formulations and free evaluation samples. Contact our sales team today for bulk wholesale pricing.

About This Supplier

Shenzhen Hanast New Materials Co., Ltd. is a professional manufacturer specialising in the research, development, manufacturing and global supply of industrial silicone materials. As a strategic branch of the renowned Shenzhen Kanglibang Technology Co., Ltd., Hanast integrates over a decade of chemical adhesive expertise with a cutting-edge 40,000-square-meter modern production base (including our newly expanding Jiangmen facility) to deliver high-capacity, reliable material solutions worldwide.

We serve as a vital tier-one supplier and OEM/ODM partner for global factories, procurement managers and engineering teams across diverse sectors, including electric vehicles (EV), battery energy storage systems (BESS), solar inverters, LED lighting and industrial automation.

FAQ

• 1. Q: What is the mix ratio and cure time of this food grade silicone?
• A: Mix Component A and Component B at a 1:1 ratio by weight. Pot life is 30-40 minutes at 25°C. It cures in 3-4 hours at room temperature, or in 20 minutes or less at 80-100°C for fast production.
• 2. Q: Is this silicone food grade and safe for food contact molds?
• A: Yes. The HN-E620 is a food-grade platinum-cure (addition) silicone compliant with FDA 21 CFR 177.2600 and LFGB, and certified with MSDS and RoHS. It is non-toxic, odourless and releases no low-molecule by-products during cure, making it suitable for gummy, jelly, candy, chocolate and baking molds.
• 3. Q: Which molds is the 20 Shore A grade best for?
• A: The 20 Shore A (HN-E620) soft-medium grade is ideal for gummy, jelly, candy, chocolate, baking, soap and candle molds and other high-detail food-contact molds. Softer grades (5-15 Shore A) suit delicate work, while harder grades (35-50 Shore A) suit rigid molds and high-wear parts.
• 4. Q: What must I avoid to prevent platinum catalyst poisoning?
• A: Platinum-cure silicone may fail to cure in contact with organotin compounds, sulfur / polysulfide, amines, polyurethane, phosphorus compounds, organic acids and solder flux. Keep all substrates, tools and containers clean, and never mix with tin-cure silicone residues.
• 5. Q: What are the MOQ, supply ability and delivery time?
• A: MOQ starts at 20 kg. Supply ability is 50 tons per month, with about 3-5 days lead time for samples and 10-15 days for bulk orders. Components A and B are packed in 10/20/25 kg iron or plastic drums, or as 20/40/50 kg kit sets.