Premium Platinum Cure Liquid Silicone Rubber for Mold Making

Powered by Shenzhen Jianghe New Materials

With 17+ years of polymer expertise, we are an ISO 9001 certified manufacturer specializing in platinum cure silicone systems. Our 20,000㎡ facility produces 25,000+ tons annually for clients in over 100 countries. We combine advanced R&D with strict quality control to deliver consistent, high-performance materials for mold makers worldwide.

Our platinum cure silicone rubber represents the pinnacle of mold making materials, engineered to meet the diverse needs of professionals across industries. Unlike traditional tin-cure silicones that release by-products during curing, our addition-cure platinum system ensures zero shrinkage and perfect dimensional stability.

The key advantage lies in its versatility. With a customizable hardness range from Shore A 0 (jelly-like flexibility) to 40 (firm durability), this material can be tailored for applications as delicate as replicating a flower petal or as demanding as industrial prototype production.

Key Benefits:

• Zero Shrinkage Precision: The ≤0.1% shrinkage rate ensures that the mold you make today will produce parts identical to those made months later, critical for multi-cavity molds and high-tolerance applications.
• Superior Flow Characteristics: Depending on the grade selected, viscosity ranges from 1,000 to 8,000 mPa.s, allowing you to choose the perfect flow for your specific application—from ultra-fine details to large industrial casts.
• Exceptional Durability: With tensile strength up to 7.5 MPa and tear resistance up to 24 kN/m, molds maintain integrity through hundreds of casting cycles, significantly reducing replacement costs.
• Food-Grade Safety: Our FDA-compliant formulation (21 CFR 177.2600) is non-toxic and odorless, making it safe for chocolate, candy, and kitchenware applications.
• Process-Friendly: The 1:1 mix ratio simplifies processing, and room-temperature cure eliminates the need for special equipment in most applications.

Detailed Technical Specifications

How to Use

Step 1: Prepare Your Master Model
Ensure the master model is clean, dry, and free from contaminants. For porous materials, apply a suitable release agent.

Step 2: Select the Right Grade
Choose the appropriate hardness and viscosity based on your application. Soft grades (0-15A) for complex undercuts, medium grades (20-30A) for general use, hard grades (40A) for maximum durability.

Step 3: Mix Thoroughly
Weigh Parts A and B accurately at 1:1 ratio. Mix slowly for 2-3 minutes, scraping sides and bottom. Avoid vigorous stirring.

Step 4: Degas (Optional)
For bubble-free critical applications, vacuum degas for 2-3 minutes. Our high-flow grades often don't require this step.

Step 5: Pour and Cure
Pour slowly from a single point. Cure at room temperature for 3-5 hours or accelerate with mild heat (60°C for 20-30 minutes).

Precautions for Mold Silicone:
1. Avoid contact with sulfur, tin, or amine-containing materials which can inhibit curing.
2. Store unopened containers in a cool, dry place away from direct sunlight.
3. For thin molds, use a support shell to maintain shape during casting.
4. Allow molds to post-cure for 24 hours before first use for optimal properties.
5. Test compatibility with new materials before full production.

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

A. Food-Grade Mold Production
Confectionery manufacturers use our food-grade platinum silicone to create chocolate bars, gummy candies, and ice cube trays. The FDA-compliant formulation ensures safety while the non-stick surface produces professional finishes.

B. Industrial Manufacturing
Production facilities rely on our industrial-grade silicone for high-volume mold making. The batch-to-batch consistency ensures that production parameters remain valid run after run, minimizing downtime.

C. Art and Sculpture Studios
Artists and sculptors choose our high-flow grades for capturing fine details in jewelry, figurines, and decorative pieces. The crystal clarity allows visual inspection before casting.

D. Architectural Concrete Casting
Construction specialists use our durable silicone to create molds for concrete panels, planters, and restoration elements. The alkaline-resistant formulation withstands cement chemistry.

Custom Silicone Solutions for Your Brand
We partner with businesses to develop proprietary silicone formulations:
1. Hardness Tuning: From Shore A 0 to 40 to match your application.
2. Color Matching: Create signature colors for your product line.
3. Private Labeling: Your brand, your packaging, our quality materials.
4. Technical Support: Engineering guidance from concept to production.
5. Bulk Supply: 20kg, 200kg, and 1000kg packaging available.
6. Exclusive Formulations: Develop proprietary materials for your market.

👉 [Contact Our OEM Team for Custom Quotation]

Why Industry Professionals Choose Jianghe Silicone:
1. 17+ Years Material Science Expertise: Deep understanding of silicone chemistry and applications;
2. ISO 9001 Certified Quality: Rigorous QC ensures consistent batch-to-batch performance;
3. 25,000+ Tons Annual Capacity: Reliable supply for businesses of all sizes;
4. Global Distribution Network: Serving clients in over 100 countries worldwide
5. Technical Partnership: Our engineers work alongside your team
6. Full Documentation: Certificates of Analysis provided with every shipment

👉 [Request a Sample Kit for Testing]

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

FAQ:

Q1: What is platinum cured liquid silicone rubber? How is it different from ordinary silicone?
A1: Platinum cured liquid silicone rubber is a two-part, addition-cure silicone that vulcanizes at room temperature or with heat using a platinum catalyst. Unlike condensation-cure silicones, it releases no by-products, has extremely low shrinkage (≤0.1%), and is not limited by thickness—making it ideal for high-precision mold making. It is also free of harmful substances like organotin, complies with food-grade safety standards, and is suitable for applications requiring high safety and accuracy.

Q2: What is the curing time for platinum silicone? Can it be accelerated?
A2: Curing time depends on ambient temperature and silicone model. At 25°C, initial curing typically takes 3–5 hours. If heated to 60°C, curing time can be reduced to 20–30 minutes. To speed up production, heat-assisted curing using an oven or heating equipment is recommended, but ensure even heating to avoid internal stress.

Q3: Is platinum silicone suitable for food molds? Is it safe?
A3: Yes, our platinum silicone is food-grade material and FDA compliant for food contact. It is non-toxic and odorless, making it suitable for chocolate, candy, baking, ice cube trays, and other food mold applications. Ensure the mold is fully cured and cleaned before use. For first-time use, we recommend wiping with food-grade alcohol.

Q4: Why does silicone sometimes cure incompletely or remain sticky? How can this be resolved?
A4: Incomplete curing is often caused by:

Contamination: Contact with sulfur, phosphorus, tin, lead, amines, or tools/containers used with condensation-cure silicone.

Incorrect ratio: Improper mixing ratio of Parts A and B.

Insufficient mixing: Inadequate stirring leads to partially uncured areas.

Solutions:

Use clean containers and tools; avoid cross-use with condensation-cure silicone equipment.

Precisely measure and mix at 1:1 or 10:1 ratio as specified.

Mix thoroughly for at least 3 minutes; degas under vacuum for complex molds.