25 Shore A Food Grade Platinum Cure Silicone Rubber with 1:1 Mix Ratio for Cement Wall Tile Molds

Platinum Cure Silicone Rubber 25 Shore A 1:1 Food Grade Liquid Silicone for Cement Wall Tile Molds

This 25 Shore A platinum cure (addition-cure) 1:1 liquid silicone rubber is a two-component mold-making silicone supplied as HN-E625 in the HN-E6XX series. Mixed at a simple 1:1 ratio by weight and cured at room temperature or by gentle heating, it delivers a tough, high-precision elastomer with excellent physiological inertness, no low-molecule release, very low shrinkage and outstanding tensile strength — ideal for cement wall tile molds, decorative wall panels and general RTV-2 food-grade mold making.

Key Features

• Shore A 25±2 hardness (HN-E625) — medium grade for general crafts, resin, gypsum and cement wall tile molds
• Two-component addition-cure (platinum) 1:1 RTV-2 system; 1:1 mix ratio by weight
• Food grade: FDA, MSDS and RoHS certified; non-toxic, odourless, non-corrosive
• Room-temperature cure (3-4 h) or heat-accelerated cure (80-100°C, ≤20 min); 30-40 min pot life at 25°C
• Excellent physiological inertness; waterproof, ozone resistant and aging resistant
• High tensile strength (6.0 MPa) and toughness; good tear resistance (24 kN/m)
• Very low linear shrinkage (≤0.1%) for high-precision reproduction; no low-molecule release during cure
• Wide operating temperature range −50°C to 200°C; 12-month shelf life; non-dangerous goods

Typical Applications

• Cement wall tile molds, wall cladding molds and 3D decorative wall panel molds
• Concrete and cement molds, cement flower pot molds and construction molds
• Cultural stone, artificial stone, terrazzo, cultured marble and architectural casting
• Gypsum, plaster and resin craft molds; decorative concrete casting
• Food-grade mold making — chocolate, candy and food contact molds
• Jewellery, art craft and handcraft molds requiring high precision
• Epoxy and polyester resin molds, prototype and vacuum casting
• Custom soft tools requiring food-grade safety and high-precision detail

Technical Data (HN-E625, 25 Shore A)

Mixing & Application

1. Pre-mix: stir Components A and B thoroughly before use to ensure homogeneity.
2. Weigh A and B at exactly 1:1 by weight using a precision scale.
3. Mix thoroughly for 2-3 minutes, scraping the container walls and bottom.
4. Degas under vacuum to remove entrapped air for bubble-free molds.
5. Pour into the clean, dry mold frame within the 30-40 min pot life.
6. Cure at room temperature for 3-4 h, or heat at 80-100°C for ≤20 min; demold after full cure.

Why Choose Us

• Factory-direct manufacturer (Shenzhen Hanast New Materials Co., Ltd.) with 10+ years of silicone experience
• OEM / ODM custom formulation, custom hardness (Shore A 0-60), color, viscosity and packaging
• Food-grade certified (FDA, MSDS, RoHS); REACH and RoHS compliant materials
• Bulk supply capacity and stable batch-to-batch quality for mass production
• Free samples for evaluation; fast lead time and export packing
• Full technical support, TDS / MSDS documentation and after-sales service
• Shenzhen / Guangdong manufacturer and platinum-cure (addition) silicone supplier — factory-direct wholesale, no middleman cost
• Industrial grade two-component 1:1 addition-cure system for consistent production quality
• Technical data sheet, shore hardness and viscosity selection guide available; custom formulation welcome
• Export packing and worldwide shipping to Asia, Europe and North America for bulk orders

About this supplier

Shenzhen Hanast New Material Co., Ltd. is a premier high-tech enterprise and leading source manufacturer specializing in the R&D, 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 25 Shore A platinum cure 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-E625 is a food-grade platinum-cure (addition) silicone certified with FDA, MSDS and RoHS; it is non-toxic, odourless and releases no low-molecule by-products during cure, making it suitable for chocolate, candy and food contact molds.

3. Q: Is this silicone suitable for cement wall tile molds?

A: Yes. The 25 Shore A (HN-E625) medium grade is widely used for cement wall tile molds, wall cladding, 3D decorative wall panels, concrete, cultural stone and gypsum molds. Softer grades suit food and delicate crafts, while harder grades (Shore A 45-50) suit rigid concrete and high-wear molds.

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 5-7 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.