HONGYE SILICONE’s High Strength RTV-2 Silicone for Casting is a premium dual-component Addition Curing Silicone, specialized for high-strength casting mold manufacturing. As a national high-tech enterprise with standardized production and one-stop solutions, this RTV-2 silicone is FDA and RoHS certified, non-toxic, odorless, and easy to operate, featuring exceptional tensile/tear strength, good fluidity, and stable dimensional stability. It caters to global B2B purchasers (casting manufacturers, industrial suppliers, craft makers) seeking durable casting materials, supporting diverse casting scenarios, flexible customization, and mass production, helping reduce mold damage and improve production efficiency.
Product Overview
Our High Strength RTV-2 Silicone for 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 with enhanced strength formula. It supports both room-temperature and heat curing with simple operation, achieving shrink-free deep curing without thickness limits, producing no toxic by-products, and boasting excellent mechanical strength—solving the pain point of low tensile/tear strength, easy damage, and short service life of ordinary Mold Making Silicone. Unlike condensation curing silicone mold rubber with poor strength, it is the trusted choice for global B2B purchasers in high-demand casting and mold manufacturing fields, with good thixotropy and demoldability for hassle-free operation.
Product Images and Videos
High-quality images showcase our High Strength RTV-2 Silicone for Casting, including its uniform liquid texture, cured high-strength elastic molds, and finished casting products (metal crafts, concrete components, precision handboards). Close-ups highlight its tensile resistance, tear resistance, and no obvious damage after repeated use. Demonstration videos display the full casting mold making process—mixing, vacuum degassing, pouring, curing, and demolding—highlighting its high strength and easy operation. Original image addresses are retained for direct website integration, helping purchasers intuitively assess its suitability for high-strength casting mold production.
Product Features & Advantages
1. Exceptional High Strength: Enhanced formula ensures tensile strength ≥5.2MPa and tear strength ≥30N/mm, 25% higher than ordinary RTV-2 silicone, resistant to deformation and damage during demolding and long-term use, far superior to condensation curing silicone mold rubber.
2. Stable Dimensional Stability: Low shrinkage rate ≤0.05% and good thixotropy, maintaining precise shape without warping, ensuring casting accuracy and reducing defects.
3. Food-Grade Safety: FDA and RoHS certified, non-toxic, odorless, no harmful by-products, suitable for food-contact casting and high-standard scenarios.
4. Easy Operation & Versatility: 1:1 mix ratio, simple stirring, good fluidity for easy pouring and detail replication; compatible with epoxy resin, polyester resin, and concrete casting.
5. Customizable Performance: Hardness, operating time, and curing time can be tailored to different casting needs without compromising strength.
6. Long Service Life: High strength supports 110~140 mold cycles, reducing mold replacement costs by 35%+ for purchasers.
How to Use (Step-by-Step for Casting Mold Making)
1. Mix Part A and Part B of the high strength RTV-2 silicone in a 1:1 weight ratio, stirring thoroughly for 2~3 minutes in an irregular direction until uniform and bubble-free, ensuring full integration to maximize strength; avoid uneven mixing which may cause local strength loss.
2. Perform vacuum degassing for 2~5 minutes; adjust time based on viscosity to eliminate bubbles, which can reduce mold strength and service life; do not exceed 10 minutes to avoid premature curing.
3. Pour the degassed silicone into casting mold masters, leveraging good fluidity to fill all details and gaps, ensuring uniform thickness for consistent strength.
4. Cure at room temperature (25℃) for 4~5 hours, or 80~120℃ for accelerated curing; placing the cured mold for 24 hours before use can further enhance strength and service life.
5. Store unused silicone in sealed packaging, indoor storage away from sunlight and rain, use within 10 months; avoid contact with N, P, S-containing compounds to prevent curing failure.
Application Scenarios
Our High Strength RTV-2 Silicone for Casting is widely used in global high-demand casting mold manufacturing, including metal crafts, alloy car accessories, epoxy resin/polyester resin casting, large cement components, cultural stone, concrete casting, and precision handboard models. It is also suitable for architectural sealing and craft scenarios, aligning with the main application fields of RTV-2 silicone. It brings tangible value: reducing mold damage rate by 40%+, improving casting qualification rate by 35%, extending service life, and supporting mass production, helping B2B purchasers enhance competitiveness and reduce production costs.
FAQ
1. What makes this RTV-2 silicone high-strength?
Its enhanced formula and advanced addition curing technology ensure superior tensile and tear strength, 25% higher than ordinary RTV-2 silicone.
2. Can it be used for heavy-duty casting molds?
Yes, its high strength and wear resistance make it suitable for heavy-duty scenarios like concrete and large cement component casting.
3. Is it suitable for food-contact casting?
Yes, it’s FDA certified, non-toxic, odorless, fully compliant with food-grade standards.
4. How to ensure maximum strength during use?
Follow the mixing and curing steps, ensure full degassing, and place the cured mold for 24 hours before use.
5. Does temperature affect its strength?
It maintains stable strength from -60℃~250℃, suitable for casting in various temperature environments.
Shenzhen Hong Ye Jie Technology Co., Ltd
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