HONGYE SILICONE’s RTV Silicone Rubber for Mold Casting is a premium two-component Addition Curing Silicone, specialized for professional mold casting across multiple industries. As a national high-tech enterprise with standardized production and one-stop solutions, this RTV silicone is FDA and RoHS certified, non-toxic, odorless, and easy to operate, featuring excellent fluidity, shrink-free curing, and high durability. It caters to global B2B purchasers’ demand for reliable mold casting materials, supporting diverse casting scenarios, flexible customization, and mass production, helping reduce mold replacement costs and enhance production efficiency.
Product Overview
Our RTV Silicone Rubber for Mold Casting is a high-performance RTV 2 Silicone Rubber, composed of high-purity flowable Part A (base rubber) and Part B (curing agent), adopting advanced addition curing technology. Tailored for mold casting needs, it supports both room-temperature and heat curing with simple operation, achieving shrink-free deep curing without thickness limits and producing no toxic by-products. Unlike ordinary Mold Making Silicone with unstable performance or poor detail replication, it solves the pain points of mold deformation, short service life, and complicated operation, making it the trusted choice for global B2B purchasers in crafts, construction, and precision manufacturing fields.
Technical Specifications
Type: Two-component addition curing RTV silicone rubber for mold casting;
Mix Ratio: 1:1 (by weight, suitable for mass production);
Operating Time (25℃): 30~40 minutes (customizable);
Curing Time (25℃): 4~5 hours;
80~120℃ for tens of minutes (accelerated curing);
Temperature Resistance: -60℃~250℃;
Hardness: 20~50 Shore A (adjustable);
Tensile Strength: ≥4.5MPa;
Tear Strength: ≥24N/mm;
Shrinkage Rate: ≤0.05%;
Viscosity: 28000~48000 mPa.s (Part A), 800~4500 mPa.s (Part B);
Certification: FDA, RoHS compliant; Shelf Life: 10 months (sealed, indoor storage);
Product Images and Videos
High-quality images showcase our RTV Silicone Rubber for Mold Casting, including its uniform liquid texture, cured elastic mold samples, and application scenarios (craft casting molds, concrete molds, precision handboard casting). Close-ups highlight its tensile resistance, fluidity, and detail replication ability. Demonstration videos display the full mold casting process—mixing, vacuum degassing, pouring, curing, and demolding—highlighting its stable performance and easy operation. Original image addresses are retained for direct website integration, helping purchasers intuitively assess its suitability for their mold casting needs.
Product Features & Advantages
1. Excellent RTV Performance: Room-temperature curing with simple operation, no need for complex equipment, suitable for on-site mold casting; heat curing optional for faster production efficiency.
3. Food-Grade Safety: FDA and RoHS certified, non-toxic, odorless, no harmful by-products, suitable for food-contact mold casting and high-standard industrial scenarios.
4. High Durability: High tensile and tear strength, supporting 95~115 mold cycles, 30% longer than ordinary RTV mold silicone, reducing mold replacement costs. 5. Fully Customizable: Hardness, operating time, curing time, and color can be tailored to diverse mold casting requirements, adapting to different materials and scenarios.
6. Stable Batch Quality: Standardized production ensures consistent performance (error ≤2%), avoiding quality fluctuations in mass production.
How to Use (Step-by-Step for Mold Casting)
1. Mix Part A and Part B of the RTV silicone rubber in a 1:1 weight ratio, stirring thoroughly for 2~3 minutes in an irregular direction until uniform and bubble-free.
2. Perform vacuum degassing for 2~5 minutes; adjust time based on viscosity, weight, and vacuum intensity to eliminate bubbles and avoid mold defects.
3. Pour the degassed silicone into mold masters, leveraging good fluidity to fill all tiny details.
4. Cure at room temperature (25℃) for 4~5 hours, or 80~120℃ for accelerated curing to meet production schedules.
5. Store unused silicone in sealed packaging, indoor storage away from sunlight and rain, and use within 10 months; avoid contact with sulfur-containing materials.
Application Scenarios
Our RTV Silicone Rubber for Mold Casting is widely used in global mold casting fields, including high-simulation food molds, metal crafts, alloy car accessories, epoxy resin/polyester resin casting, large cement components, cultural stone, concrete molds, and precision handboard model casting. It brings tangible value: reducing mold replacement costs by 38%+, improving casting efficiency, ensuring stable mold quality, and supporting mass production, helping B2B purchasers reduce costs and enhance competitiveness in the mold casting market.
FAQ
1. Is this RTV silicone suitable for room-temperature mold casting?
Yes, it supports room-temperature curing with simple operation, no need for special equipment, suitable for on-site casting.
2. Can it be used for food-contact mold casting?
Yes, it’s FDA certified, non-toxic, odorless, fully compliant with food-grade standards for food-contact mold production.
3. Can we customize its hardness and curing time?
Yes, hardness (20~50 Shore A), operating time, and curing time can be tailored to your mold casting needs.
4. How many mold cycles does it support?
It supports 95~115 mold cycles, meeting long-term mass casting requirements.
5. What’s the storage requirement to maintain performance?
Seal it properly, store indoors away from sunlight and rain, and use within 10 months; avoid sulfur-containing materials.
Shenzhen Hong Ye Jie Technology Co., Ltd
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