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

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

This HN-E625 is a two-component 1:1 addition-cure (platinum) liquid silicone rubber with 25 ± 2 Shore A hardness. Food-grade certified (FDA) and featuring 6.0 MPa tensile strength, 24 kN/m tear strength and linear shrinkage of ≤ 0.1%, it reproduces fine tile and stone textures precisely and demoulds cleanly for cement wall tiles, 3D wall panels, culture stone and a wide range of decorative and food-contact moulds.

Key Features

• Food grade & safe — FDA, MSDS, RoHS and REACH compliant; non-toxic, odourless, non-corrosive
• 25 Shore A ± 2 — soft yet tear-resistant, ideal for fine-textured tile, stone and craft moulds
• 1:1 mix ratio (A : B by weight); 30–40 min pot life; low viscosity for easy mixing and bubble removal
• High tear strength (24 kN/m) & 6.0 MPa tensile strength for durable, long-lasting moulds
• Ultra-low shrinkage ≤ 0.1% → high precision and faithful surface reproduction
• Wide temperature range −50 °C to 200 °C; waterproof, ozone and aging resistant; cures at room temperature (3–4 h) or heat-accelerated (80–100 °C in ≤ 20 min)
• Customisable hardness (0–60 Shore A), viscosity and working time; OEM / ODM and private label service available

Technical Data (HN-E625)

Recommended Applications

• Cement wall tile & wall panel moulds — embossed wall tiles, 3D wall panels and interior/exterior cladding
• Culture stone & artificial stone moulds — veneer stone, faux stone, terrazzo and imitation stone products
• Gypsum & plaster craft moulds — plaster cornice, gypsum line and decorative ornaments
• Concrete & cement product moulds — pavers, planters, garden ornaments and small precast elements
• Food-contact moulds — chocolate, candy, cake, soap and candle moulds (food grade, 1:1)
• Resin, epoxy & polyester casting moulds — crafts, figurines and prototypes
• General RTV-2 mould applications requiring food-grade safety and high precision

Mixing & Application Instructions

1. Pre-mix: stir Components A and B thoroughly before use.
2. Weighing: accurately weigh A and B in a 1:1 ratio by weight with a precision scale.
3. Mixing: mix for 2–3 minutes until uniform; scrape the 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.

Catalyst poisoning warning: this addition-cure (platinum) silicone may fail to cure in contact with organotin, sulfur/polysulfide, amine, polyurethane, phosphorus compounds, organic acids or solder flux residues. Keep all substrates, tools and containers clean and free of these contaminants, and do not mix with tin-cure (condensation) silicone residues.

Wholesale Supply & Custom Manufacturing

As a China-based silicone manufacturer and factory-direct supplier, we support bulk wholesale and export volume orders, plus custom OEM / ODM and private-label projects. Hardness, viscosity, colour, pot life and curing time can all be tailored to your application. Free samples are available for evaluation, with fast sample turnaround and stable bulk lead times.

• MOQ: 20 kg
• Supply Ability: 100 Tons per Month
• Delivery: 3–5 days for samples, 10–15 days for bulk production
• Payment: T/T, L/C, PayPal, Western Union
• Packaging: A and B in 10 / 20 / 25 kg drums; 20 / 40 / 50 kg per kit set

About This Supplier

Shenzhen Hanast New Materials Co., Ltd. is a professional manufacturer of liquid silicone rubber specialising in addition-cure (platinum) and condensation-cure silicone for mould making. Our HN-E6XX platinum series covers 0–60 Shore A and is certified to FDA, MSDS, RoHS and REACH, serving customers in construction, architecture, arts & crafts, food-contact and precision casting industries worldwide.

FAQ

1. Q: What is the mix ratio and cure schedule of this food grade silicone rubber?
A: Mix Components A and B in a 1:1 ratio by weight. Pot life is 30–40 minutes at 25 °C; it cures at room temperature in 3–4 hours, or heat-accelerated at 80–100 °C in 20 minutes or less.

2. Q: Is this 25 Shore A silicone suitable for cement wall tile and culture stone moulds?
A: Yes. With 6.0 MPa tensile strength, 24 kN/m tear strength and ≤ 0.1% shrinkage, HN-E625 reproduces fine tile and stone textures precisely while demoulding cleanly — ideal for cement wall tiles, 3D wall panels and culture stone.

3. Q: Is it food-safe for chocolate, candy, soap and candle moulds?
A: Yes. It is FDA, MSDS, RoHS and REACH certified — non-toxic, odourless and non-corrosive — and is widely used for food-contact and cosmetic moulds such as chocolate, candy, cake, soap and candle moulds.

4. Q: How can I avoid platinum catalyst poisoning?
A: Keep substrates, tools and containers free of organotin, sulfur/polysulfide, amines, polyurethane, phosphorus compounds, organic acids and solder flux residues, and never mix with tin-cure silicone residues.

5. Q: What are the MOQ, lead time, packaging and certifications?
A: MOQ is 20 kg; samples ship in 3–5 days and bulk orders in 10–15 days. A and B are packed in 10/20/25 kg drums or 20/40/50 kg kits. Certified FDA, MSDS, RoHS and REACH. Free samples are available.