HONG YE SILICONE GRC Mould Making Silicone Rubber is a professional industrial-grade RTV 2 Silicone Rubber, tailored for GRC (Glass Fiber Reinforced Concrete) mold production, available in Condensation Curing Silicone Mold Rubber (cost-effective) and Addition Curing Silicone (platinum-cured, high-performance). As premium Mold Making Silicone and liquid silicone , it boasts high tensile strength, excellent weather resistance, low shrinkage, and strong adhesion resistance to GRC materials. Easy to demold, durable, and anti-aging, it features wide temperature resistance (-65℃ to 350℃), helping global B2B buyers (GRC manufacturers, construction enterprises) improve mold service life, ensure GRC product precision, and reduce production costs.
Product Overview
Specially developed for GRC mould crafting, this Industrial mold silicone rubber focuses on solving core pain points of GRC manufacturers—mold durability, detail replication, and resistance to concrete adhesion. It is a two-component flowable liquid (Part A: base silicone, Part B: curing agent), offering two curing options to match diverse procurement needs. Industrial-grade condensation curing silicone delivers cost-effectiveness for large-scale GRC production (e.g., architectural components), while platinum-cured silicone ensures superior tensile strength and longer mold lifespan, ideal for high-precision GRC products (e.g., decorative panels, garden ornaments). Its flexible yet tough texture guarantees damage-free demolding and precise replication of GRC details, making it a reliable choice for both large construction enterprises and GRC craft factories.
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: Industrial-grade 100:3 (silicone:catalyst); Platinum-cured 1:1/10:1; Hardness: 25-35 Shore A (tough and flexible); Viscosity: Medium-high (anti-slip for vertical GRC molds); Shrinkage rate: ≤0.2% (industrial), ≤0.1% (platinum); Temperature resistance: -65℃ to 350℃; Weather resistance: UV-resistant, water-resistant, acid-alkali resistant; Curing condition: Room temperature (25℃), 4-8hrs full curing; Shelf life: 12 months (original sealed package, dry & cool ≤25℃); Packaging: 1kg/jar, 5kg/20kg/25kg/200kg drum, vacuum packaging available.
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Product Features & Advantages
High tensile and tear strength ensures mold durability, withstanding repeated GRC pouring and demolding cycles (up to 200+ times). Excellent adhesion resistance prevents sticking to GRC concrete, enabling smooth demolding without damaging mold or GRC products. Dual curing options: Industrial-grade (cost-effective, suitable for mass GRC production); Platinum cured mold silicone (high-performance, UV-resistant, longer lifespan). Low shrinkage ensures precise replication of GRC details (e.g., decorative patterns, texture), improving product consistency. Weather resistance (UV, water, acid-alkali) allows mold use in outdoor construction scenarios. Flexible 25-35 Shore A hardness adapts to irregular GRC mold shapes. Non-toxic, odorless, and compliant with industrial safety standards, ensuring safe production. Our product outperforms competitors in GRC material compatibility and mold durability.
How to Use the Product
Step 1: Prepare the GRC prototype (architectural component, ornament) and molding frame, fix the prototype tightly; apply release agent only for smooth non-porous prototypes (glass, metal), skip for porous GRC prototypes.
Step 2: Choose industrial or platinum-cured silicone, weigh according to the recommended ratio, and stir thoroughly for 3-5 minutes to ensure uniform mixing.
Step 3: Conduct vacuum defoaming for 2-3 minutes to remove air bubbles (key for smooth mold surfaces and detail replication).
Step 4: Pour the mixed silicone into the frame, ensuring all detail areas and irregular surfaces are fully covered; for vertical molds, apply silicone evenly to avoid slipping.
Step 5: Cure at 25℃ for 4-8 hours (full curing), demold gently, and start GRC concrete pouring immediately.
Application Scenarios
Mainly used for making molds for GRC (Glass Fiber Reinforced Concrete) products, including architectural components (wall panels, columns, cornices), garden ornaments (statues, flower pots), municipal facilities (roadside decorations), and decorative GRC panels. Also applicable to mold making of concrete crafts, plaster products, and large-scale decorative sculptures. Suitable for GRC manufacturers, construction companies, architectural decoration enterprises, and municipal engineering suppliers. It helps buyers extend mold service life by 50%+, improve GRC product precision and consistency, reduce mold replacement costs, and enhance production efficiency for large-scale projects.
Certifications and Compliance
The product meets ISO 9001 quality management system and CE industrial standards. Platinum-cured silicone complies with international industrial safety regulations, non-toxic, odorless, and safe for construction site use. All formulas comply with international chemical transportation and import regulations, facilitating smooth cross-border B2B bulk procurement and market entry for global construction and GRC enterprises.
Customization Options
Supports viscosity adjustment to adapt to different GRC mold shapes (flat, vertical, irregular). Offers hardness customization (20-40 Shore A) to match GRC product weight and detail complexity. Provides curing speed adjustment (3-10hrs) to match project construction schedules. Offers formula modification for ultra-large GRC molds (e.g., building facades) and enhanced weather resistance. Customizes packaging specifications (small test jars to industrial drums) based on buyer order volume and project needs.
Production Process
Adopts high-purity industrial-grade Silicone raw materials and high-quality curing agents, undergoing precise proportioning, closed-loop vacuum mixing (to maintain viscosity and avoid bubbles), multi-dimensional testing (tensile strength, weather resistance, shrinkage rate, adhesion resistance), automatic filling, and sealed packaging. Each batch undergoes strict quality inspection to ensure consistent performance, adapting to the harsh requirements of GRC construction scenarios. Mature production lines and sufficient inventory guarantee on-time delivery for both small-batch mold trials and large-scale project bulk orders.
FAQ
Q1: Can this silicone be used for outdoor GRC molds?
A1: Yes, it has excellent weather resistance (UV, water, acid-alkali resistant), suitable for long-term outdoor use.
Q2: What’s the difference between industrial and platinum-cured silicone for GRC molds?
A2: Industrial-grade is cost-effective for mass production; platinum-cured offers higher tensile strength, longer lifespan (200+ uses), and better weather resistance.
Q3: Do I need a release agent for GRC prototypes?
A3: No, the silicone’s anti-adhesion formula prevents sticking to GRC concrete; release agent is only for smooth non-porous prototypes.
Q4: How many times can one mold be reused?
A4: Industrial-grade: 100-150 times; platinum-cured: 200+ times, depending on use and maintenance.
Q5: Can it be customized for ultra-large GRC molds (e.g., building facades)?
A5: Yes, we can adjust viscosity and formula to adapt to ultra-large and irregular GRC molds while maintaining detail replication ability.
Shenzhen Hong Ye Jie Technology Co., Ltd
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