ShoreA 20 Tin Cured Liquid Silicone Rubber for GRC Decorations

Professional Liquid Silicone Manufacturing Experts
Shenzhen Jianghe New Materials Technology Co., Ltd. is a leading developer and manufacturer of high-performance polymer materials, including epoxy resin, PU resin, UV resin, and liquid silicone rubber. As an integrated source factory combining R&D, production, and sales, we operate a 20,000㎡ modern production base in Dongguan, certified with ISO9001 and other international standards. Supported by advanced equipment, a dedicated R&D team, and a strict QC system, we deliver over 25,000 tons of stable, high-quality, and cost-effective products annually to clients in over 100 countries. We specialize in customized formulations and OEM/ODM services, empowering industries from crafts and furniture to electronics and composites with reliable material solutions.

Why Choose This Tin Cured Liquid Silicone?

1. Professional Architectural Mold Material Design

• Specifically developed for industrial production requirements of GRC molds and cement component molds, meeting high-intensity usage demands;
• Formula specially optimized with excellent alkali resistance, capable of long-term resistance to chemical erosion from cement materials;
• Thermal stability adjusted to accommodate temperature variations during building component production, ensuring architectural mold dimension accuracy.

2. Industrial Production Process Optimization

• Viscosity range 17,000-27,000 mPa.s specifically designed for building molds, balancing flowability and detail retention;
• 4-5 hour room temperature curing time perfectly matches construction industry production rhythms, improving mold making efficiency;
• Supports mechanical mixing and pouring operations, suitable for batch production of large building component molds.

3. Exceptional Durability and Cost-Effectiveness

• High tensile strength (3.2-4.5 MPa) design ensures architectural molds can withstand concrete pouring pressure;
• 800-1000 reuse cycles significantly reduce per-piece mold costs for architectural decoration production;
• Excellent weather resistance ensures long-term stable use of outdoor building molds, adapting to various climate conditions.

4. Detail Replication and Dimensional Control

• Low linear shrinkage rate (≤0.3%) ensures dimensional accuracy of large building component molds, reducing installation errors;
• Capable of precisely replicating complex textures of architectural decorations, including stone patterns, wood grains, and other surface effects;
• Specially optimized demolding performance minimizes damage to cement component surfaces, improving finished product quality.

Detailed Technical Specifications

How to Use
1.Precise Weighing: Use a digital scale to accurately weigh components at a strict A : B = 100 : 2 (or 100:3) ratio by weight. Component B (curing agent) is used in very small amounts—accuracy is crucial for successful curing.
2.Initial Mixing: Add Component B to Component A. Mix with a stirrer at low speed, clockwise for 3-5 minutes until the color is completely uniform. Scrape the walls and bottom of the container to avoid unmixed spots.
3.Vacuum Degassing: Pour the mixed silicone into a container placed inside a vacuum degassing chamber. Turn on the vacuum pump and maintain a vacuum of -0.1 MPa for 2-3 minutes, until bubbling stops and the silicone surface settles flat. This is the core step to eliminate bubbles and ensure mold quality.
4.Pouring into Mold: After degassing, promptly and in one go, pour the silicone slowly from the container edge into the prepared master mold. Utilize its good flowability to self-level and fill every detail.
5.Curing: Allow to cure completely at room temperature (25°C) for 4-5 hours before demolding. Avoid vibration or movement. To accelerate, apply mild heat (40-50°C) to reduce time to 2-3 hours.

Precautions for Mold Silicone:
1. Adjust the amount of curing agent based on temperature—reduce it in high temperatures. Excessive curing agent will cause the mold to harden and become brittle; insufficient curing agent will prolong the working time.
2. To prevent changes in mold silicone properties, it is recommended not to add silicone oil.
3. For optimal mold performance, allow the mold to cure for at least 24 hours before use.
4. The curing speed of this product is closely related to ambient temperature. Higher temperatures accelerate curing. Users may adjust the amount of hardener based on ambient temperature to achieve the desired curing speed.

Shelf Life:
Unopened packaging at room temperature (25°C): 12 months. Finished silicone molds can be stored for up to six months without loss of performance.

Storage and Transportation:
1.Mold silicone should be stored at room temperature in a dry, sealed container. Avoid contact with water to prevent deterioration.
2.This product is classified as non-hazardous for transportation.

Applications & Project Gallery

1. Professional GRC Component Factory Applications

• A large Beijing GRC curtain wall panel manufacturer adopts this architectural mold silicone to create 3m×5m large GRC molds, with annual production reaching 20,000 square meters;
• Shanghai architectural decoration company uses this product to produce Roman column molds and decorative molding molds, successfully applied in multiple high-end commercial complex projects;
• Guangzhou precast component factory uses this silicone for exterior wall panel mold production, achieving precise replication of complex geometric patterns.

2. Cement Product Enterprise Production Applications

• Chengdu Cement Art Products Factory applies this tin cured silicone to manufacture cement railing molds and landscape planter molds, with products exported to Southeast Asian markets;
• Xi'an Historical Building Restoration Company uses this architectural mold material to replicate traditional cement component molds, preserving original features of historical buildings;
• Hangzhou Garden Engineering Company adopts this product to create wood-imitation cement component molds, applied in multiple national park construction projects.

3. Construction Site Applications

• Xiong'an New Area construction project uses this fast-curing mold silicone for on-site creation of custom architectural decorative element molds, reducing construction cycle by 30%;
• Shenzhen subway station decoration project applies this silicone to make art wall molds, achieving perfect integration of standardization and personalization;
• Multiple urban renewal projects adopt this on-site mold making material, quickly responding to design changes and improving construction flexibility.

4. Special Construction Project Applications

• 2022 Winter Olympics venue construction project uses this product to create ice and snow theme decorative molds, reflecting integration of technology and art;
• Multiple theme park construction projects adopt this special architectural mold silicone to make special-shaped decorative component molds, creating unique visual experiences;
• Religious building restoration projects apply this traditional architectural mold material to replicate historical building decorative components, achieving precise cultural heritage protection.

OEM Customization Service
1.Customized formulation: Viscosity, flowability, curing time, hardness, transparency, color, and various functional additives. Can be adjusted according to needs to meet different industry application scenarios.
2.Packaging Customization: Multiple packaging sizes are available to suit your production scale, including 1kg, 5kg, 20kg, 25kg, and 200kg drums. All packaging follows international shipping standards to ensure safety and durability.
3.Private Label: Supports brand customization, including bottle label design, outer packaging printing, and logo labeling, helping brand owners and wholesalers quickly build their own brands and enter the market.
4.Supplies and Kits: Pre-mixed kits (such as resin + pigment + mold + tools, etc.) are provided according to your end product.
5.Color Matching and Functional Additives: Offers color matching services, supporting adjustments for black, red, yellow, and other colors.
6.Sample support: We support sample orders for performance testing before mass production. This ensures compatibility with your process, equipment, and application requirements.
7.Technical consultation and process guidance: Engineers provide one-on-one technical guidance on construction suggestions, curing conditions, mixing ratios, application processes, etc., to help you solve practical problems.

Why Choose Our Customization Services?

1.Fast Response — Initial Technical Proposal Within 72 Hours
Once we receive your requirements, our engineering team will provide an initial formulation direction or technical recommendation within 72 hours. This significantly shortens your R&D cycle and speeds up time-to-market.

2. Cost Advantage — 15–30% Lower Than Trading Companies
As a factory with no middlemen, we offer highly competitive OEM pricing while maintaining strict quality standards. Ideal for distributors, factories, and brand owners seeking stable and scalable supply.

3. Confidentiality Guaranteed — 100% NDA Support, Formulations Never Disclosed
Every custom project can be secured with an NDA. We protect your formulations, data, and intellectual property with strict confidentiality standards and never share them with third parties.

4. End-to-End Control: One-Stop Service from Raw Materials to Delivery
Full in-house control over formulation, production, filling, private labeling, packaging, and logistics ensures consistent quality and stable supply.

5. 17+ Years of Material Manufacturing Expertise
With deep expertise in epoxy resin, PU resin, UV resin, liquid silicone rubber, and gypsum powder, we understand the performance needs of various industries including electronics, crafts, automotive, LED, molds, and flooring.

6.Technical Core: In-House R&D Center and Engineering Team
Experienced application engineers provide one-on-one support in formulation tuning, process optimization, and troubleshooting to ensure optimal performance.

7. Stable Quality — ISO9001 Certified Production
We follow strict quality control standards under ISO9001:2015. Every batch is traceable, stable, and tested to meet your specifications.

8. Fast Sampling & Flexible MOQ
We support rapid sample production and low-MOQ orders, reducing risks for new product launches, distributors, and factory procurement.

9. Brand Empowerment: Complete Private Label and Packaging Customization
Full white-label services including label design, multi-size packaging, and brand logo printing to help you build a professional brand image with ease.

10.Global Delivery: Scalable Production and International Logistics Network
Own large-scale production facilities paired with a mature global logistics network ensure stable output and on-time delivery worldwide.

If You Need Customized Packaging Or Other Specifications, Please Contact Us.

FAQ:

Q1: What Is Tin Cured Liquid Silicone Rubber? What Is It Best Used For?
A: Tin Cured Liquid Silicone Rubber is a condensation-cure, two-part RTV silicone that vulcanizes rapidly at room temperature using an organotin catalyst. It features excellent flowability, easy operation, fast curing, and cost-effectiveness, making it ideal for:
① Architectural mold making (cornices, Roman columns, railings);
② Sculpture and craft casting molds;
③ Artificial stone and GRC component molds;
④ Candle and handmade soap molds;
⑤ Cultural gifts and furniture decoration molds.

Q2: How Should Tin Cured Silicone Be Stored? What Is The Shelf Life?
A: Unopened products can be stored for up to 12 months in a cool, dry place. Once opened, seal tightly and avoid exposure to air and moisture. Mixed silicone should be used within the pot life and cannot be re-stored.

Q3: What Is The Pot Life And Cure Time Of Tin Cured Silicone? How Can I Control Curing Speed?
A: Pot life is typically 30–50 minutes, with full cure in 3–5 hours at 25°C. Curing can be adjusted by:
① Increasing temperature: Gentle heat accelerates curing;
② Adjusting ratio: Slightly increasing Part B can speed cure (use with caution);
③ Controlling environment: Keep dry and well-ventilated.

Q4: Why Might Tin Cured Silicone Not Cure Fully Or Remain Sticky? How To Fix It?

A: Common causes include: ① Incorrect ratio: Improper weighing of A:B (not 100:2 or 100:3); ② Insufficient mixing: A and B not blended thoroughly; ③ Contamination: Contact with sulfur, phosphorus, amines, or dirty tools; ④ Moisture: High humidity during operation.

Solutions:
Use a digital scale for precise measurement;
Mix for at least 3 minutes until uniform;
Use dedicated, clean tools;
Operate in a dry environment.