Product Overview
This professional GRC molding solution is built for the harsh conditions of concrete and fiberglass composite casting. As a two-part liquid silicone system (Part A silicone base + Part B curing agent), it provides two curing options to match different production scales. The condensation cure type delivers cost efficiency for mass GRC manufacturing, while the platinum cure version offers enhanced durability and outdoor stability. With optimized toughness and flexibility, it perfectly reproduces fine textures and complex shapes, solving common issues like mold tearing, concrete sticking and rapid aging for GRC factories and construction enterprises.
Technical Specifications
Product type: RTV 2 Silicone Rubber, mold making silicone, Liquid Mold Silicone, industrial Mold Silicone rubber; Curing systems: Condensation curing (tin-cure), addition curing (platinum-cured); Mixing ratio: 100:3 & 1:1/10:1; Hardness: 25–35 Shore A; Viscosity: Medium-high (stable for vertical molds); Shrinkage: ≤0.2% (condensation), ≤0.1% (platinum); Temperature resistance: -65℃ to 350℃; Curing time: 4–8 hours at 25℃; Shelf life: 12 months (sealed, dry & cool ≤25℃); Packaging: 1kg/jar, 5kg/20kg/25kg/200kg drum, vacuum packing available.
Product Images and Videos
Product images:
Product Features & Advantages
High tensile & tear strength withstands heavy GRC casting and frequent demolding. Strong anti-adhesion property prevents sticking to concrete for damage-free demolding. Alkali & UV resistance extends mold life in outdoor construction environments. Low shrinkage ensures high dimensional accuracy for architectural GRC parts. Flexible hardness adapts to irregular contours and complex decorative textures. Room-temperature curing simplifies on-site and factory production. Dual-cure systems satisfy both budget and high-performance demands.
How to Use the Product
Step 1: Prepare GRC master pattern and mold frame, seal all gaps to avoid leakage. Step 2: Mix silicone and curing agent at the recommended ratio, stir uniformly for 3–5 minutes. Step 3: Vacuum defoam for 2–3 minutes to eliminate bubbles for smooth surfaces. Step 4: Pour or brush the silicone onto the pattern, fully covering all details. Step 5: Cure at 25℃ for 4–8 hours, demold carefully before GRC casting.
Application Scenarios
Widely used for GRC architectural panels, columns, cornices, garden statues, flower pots and municipal decorative parts. Also suitable for concrete crafts, plaster sculptures and large-scale precast building components. Ideal for GRC manufacturers, construction companies, decoration firms and landscape engineering suppliers. It extends mold service life, improves product consistency and reduces replacement costs for large-scale projects.
Certifications and Compliance
Complies with ISO 9001 and CE industrial standards. Formulas meet international chemical transportation and safety regulations. Platinum-cured versions support safe use in construction and outdoor engineering projects, ensuring smooth cross-border bulk procurement.
Customization Options
Supports hardness (20–40 Shore A), viscosity and curing speed customization. Provides formula adjustment for ultra-large GRC molds and enhanced outdoor durability. Packaging can be customized from small test jars to industrial bulk drums.
Production Process
Made with high-purity industrial Silicone raw materials, processed via precise mixing, vacuum defoaming, multi-performance testing and sealed packaging. Strict quality control ensures stable performance under GRC casting conditions, with stable supply for large orders.
FAQ
Q1: Is this silicone suitable for outdoor GRC molds?
A1: Yes, it features UV, water and alkali resistance for long-term outdoor use.
Q2: How long can a GRC mold be reused?
A2: Industrial type: 100–150 times; platinum type: over 200 times with proper care.
Q3: Can it be used for vertical wall molds?
A3: Yes, medium-high viscosity prevents slipping and ensures uniform coating.
Q4: Do I need a release agent?
A4: Not required for GRC materials; only recommended for glass or metal patterns.
Q5: Can it be customized for large building facade molds?
A5: Yes, we offer formula and viscosity adjustment for large and irregular GRC molds.
Shenzhen Hong Ye Jie Technology Co., Ltd
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