Silicone for Antique Brick Mold Making

The Antique Brick Mold Making industry demands mold-making materials that deliver exceptional precision, reliability, and cost-efficiency. Whether you are producing decorative architectural elements, artisan crafts, food-grade products, or industrial components, the quality of your silicone mold directly determines the quality of every cast you produce.

Hong Ye Silicone's Addition Curing Silicone rubber (Model HY-E620) has been specifically formulated to excel in heritage & antique finishes applications. Based on advanced platinum-catalyzed technology, this Liquid silicone rubber delivers near-zero shrinkage, outstanding tear resistance, and food-safe curing — properties that set it apart from conventional condensation-cure systems.

With 20 Shore A hardness, this formulation strikes the optimal balance between flexibility for easy demolding and rigidity for dimensional stability. The viscosity range of 16000-20000 cps ensures excellent flow properties that capture every surface detail while minimizing air entrapment during pouring.

Manufactured in our 10,000 sqm facility in Shenzhen with 20 automated production lines, every batch undergoes rigorous quality control to ensure consistent performance. With over 25 years of silicone R&D experience and exports to 138+ countries, Hong Ye Silicone is the trusted partner for mold makers worldwide.

Key Features

• Addition Curing (Platinum Catalyst) System — Unlike tin-catalyzed condensation cure silicones, our platinum system produces no byproducts during curing. This means zero shrinkage (<0.1%), no odor, no toxic emissions, and complete safety for food-contact and skin-contact applications. The curing reaction is a clean addition reaction where all components are incorporated into the final elastomer.

• Near-Zero Shrinkage (<0.1%) — Every detail captured in your master pattern is faithfully reproduced in every single cast, even after hundreds of production cycles. This eliminates dimensional drift between early and late production runs, ensuring perfect consistency for batch manufacturing.

• High Tear Strength (20 kN/m) — Mold edges, thin sections, and detailed areas resist splitting and tearing during demolding. This translates directly to longer mold life and lower per-unit mold costs. Compare this to standard silicones at 10-15 kN/m and appreciate the 20 kN/m difference.

• Excellent Flow & Detail Reproduction — At 16000-20000 cps viscosity, the material flows readily into fine textures, sharp corners, and complex undercuts. The self-leveling properties ensure even coverage without manual spreading, reducing labor time and improving mold surface quality.

• Wide Temperature Stability (-60°C to 200°C) — Perform reliably in any production environment, from cold warehouses to hot factory floors. The silicone maintains its elastic properties and dimensional stability across the entire temperature range, and can withstand exothermic reactions from casting materials.

• Flexible Mixing Ratios (1:1 or 10:1 by weight) — Choose 1:1 ratio for extended working time on large, complex molds where you need maximum positioning time. Switch to 10:1 for faster turnaround on smaller production pieces. The adjustable pot life of 35-50 minutes gives complete workflow control.

• Food-Grade & Skin-Safe Certification — Fully compliant with FDA, REACH, and RoHS standards. The platinum catalyst system ensures no harmful residues remain after curing. This makes HY-E620 suitable for chocolate molds, cake pans, medical devices, prosthetics, and any application requiring direct human contact.

• Extended Mold Life (800-1000+ casts) — With proper maintenance, a single mold can produce hundreds to over a thousand casts. The combination of high tear strength, chemical resistance, and dimensional stability ensures the mold performs consistently from first cast to last.

• Chemical Resistance — Fully compatible with gypsum, cement, GRC, polyurethane foam, epoxy resin, wax, concrete, polyester resin, and most other common casting materials. The silicone will not react, swell, or degrade when in prolonged contact with these substances.

Technical Specifications

| Parameter | Specification | Test Standard | |-----------|--------------|---------------| | Model | HY-E620 | — | | Appearance | Translucent liquid | Visual | | Hardness | 20 Shore A | GB/T 531 | | Viscosity | 16000-20000 cps | GB/T 10247 | | Tear Strength | ≥20 kN/m | GB/T 529 | | Tensile Strength | ≥5.0 MPa | GB/T 528 | | Elongation at Break | ≥400% | GB/T 528 | | Shrinkage Rate | ≤0.1% | Enterprise standard | | Mixing Ratio | 1:1 or 10:1 (by weight) | — | | Pot Life (25°C) | 35-50 minutes | — | | Curing Time (25°C) | 4-5 hours | — | | Temperature Resistance | -60°C to 200°C | — | | Shelf Life | 12 months (sealed) | — | | Certifications | ISO 9001, FDA, REACH, RoHS, UL, CE | — |

Detailed Applications

1. Antique Brick Mold Making replica antique bricks, weathered stone tiles, and heritage finishes. This application represents the core use case for Model HY-E620. The 20A hardness provides the ideal combination of flow and strength for heritage & antique finishes work. Pour or brush the silicone over your prepared master pattern, allow to cure for 4-5 hours, and you have a production-ready mold that will deliver hundreds of high-quality casts.

2. Compatible Casting Materials Model HY-E620 is compatible with a wide range of casting materials including gypsum/plaster, cement and GRC mixtures, polyurethane foam, epoxy resin, polyester resin, wax, concrete, and low-melt alloys. The chemical inertness of cured silicone ensures no interaction with any of these materials.

3. Small-Batch Prototyping With MOQ as low as 2kg, HY-E620 is ideal for prototype development and design validation. Create your first mold, test the design, make modifications to the master, and produce a revised mold — all without committing to large material purchases.

4. High-Volume Production Once your design is validated, scale up to full production. The batch-to-batch consistency guaranteed by our ISO 9001 quality system means every new mold will perform identically to your approved prototype mold. Order in 20kg or 200kg packages for maximum cost efficiency.

5. Custom Color Matching While HY-E620 comes in translucent form as standard, custom colors can be formulated for your specific requirements. This is useful for color-coding molds by hardness, application, or production line in large manufacturing environments.

6. Educational & Training Use The forgiving working characteristics of HY-E620 make it an excellent choice for training new mold makers. The 35-50-minute pot life provides ample time to practice pouring techniques, and the reliable curing ensures consistent results even for beginners.

Operating Guide

Step 1 — Pattern Preparation Thoroughly clean your master pattern. For porous originals (wood, plaster, foam), apply 2-3 coats of shellac or PVA sealer, sanding lightly between coats. For non-porous patterns (metal, glass, sealed resin), apply a thin layer of petroleum jelly or specialized release agent. Ensure the pattern is completely dry before proceeding.

Step 2 — Mold Box Construction Build a rigid containment box using acrylic board, melamine-faced MDF, or foam board. Leave 3-5cm clearance on all sides and 2-3cm above the highest point of the pattern. Seal all joints with hot glue or silicone sealant to prevent leaks. For large flat molds, ensure the box is perfectly level.

Step 3 — Weighing & Mixing Using a digital scale, weigh Part A (silicone base) and Part B (platinum catalyst) according to your chosen ratio (1:1 or 10:1 by weight). Accuracy within ±2% is essential for reliable curing. Pour Part B into Part A slowly. Stir gently but thoroughly in ONE direction for 3-5 minutes, scraping the sides and bottom of the mixing container. Avoid whipping air into the mixture.

Step 4 — Vacuum Degassing Place the mixing container in a vacuum chamber. Pull vacuum to -0.095 MPa. The mixture will rise as air bubbles expand and escape. Hold vacuum for 2-3 minutes until bubbling stops. Release vacuum slowly. This step is critical for bubble-free molds, especially for transparent and detail-critical applications.

Step 5 — Pouring Pour the degassed silicone in a thin, steady stream from the lowest point of your pattern. Allow the silicone to flow naturally upward and across the surface. For large molds, consider pouring in a spiral pattern from center outward. Avoid pouring from excessive height to prevent air entrapment.

Step 6 — Curing Allow the silicone to cure at room temperature (25°C) for 4-5 hours. For faster turnaround, cure at 60°C for 2 hours in an oven or with a heat gun. Do not attempt to demold before full cure — incomplete cure will result in a weak, tacky mold that will not perform properly.

Step 7 — Demolding & Inspection Once fully cured, carefully separate the mold from the pattern. Start by gently peeling edges, then gradually work around the entire mold. Inspect the mold surface for bubbles, incomplete coverage, or defects. A well-made mold should have a smooth, glossy surface with perfect detail reproduction.

Step 8 — Post-Cure & First Use For maximum mold durability, allow the finished mold to rest for 12-24 hours before first production use. Before the first cast, lightly dust the mold surface with talc or apply a light mold release to optimize release properties.

Packaging & Shipping

• Available Sizes: 1kg, 5kg, 20kg, 25kg, and 200kg packages • Part A + Part B: Supplied as complete kits with matching catalyst quantities • Storage: Store in cool, dry place (5-30°C) in original sealed containers • Shelf Life: 12 months from manufacture date when properly stored • Shipping Terms: FOB Shenzhen, CIF, DDP, and DDU available worldwide • Delivery Time: 3-7 working days for standard orders; 7-15 days for custom formulations • Documentation: TDS, MSDS, COA, and shipping documents provided with every order

Why Choose Hong Ye Silicone?

✅ 25+ years of silicone R&D and manufacturing expertise since 1998 ✅ 10,000 sqm modern production facility with 20 automated production lines ✅ Monthly capacity exceeding 220 tons ensuring stable supply ✅ MOQ as low as 2 kg — perfect for sampling and trial orders ✅ Exported to 138+ countries with DDP/DDU shipping terms available ✅ Full batch traceability and quality consistency guaranteed ✅ Technical support and custom formulation services available ✅ ISO 9001, FDA, REACH, RoHS, UL, CE certified