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Two-component, platinum-catalyzed addition-cure silicone elastomer system for high-fidelity replication and rapid prototyping.
Low viscosity before cure enables excellent air release and fine detail reproduction in complex molds.
Shore A hardness of ~30 after full cure, offering soft, flexible, and tear-resistant elastomeric properties.
Excellent thermal stability with continuous service capability up to 180 °C.
Low compression set and outstanding long-term elasticity retention under repeated deformation.
Prototyping and master pattern duplication for investment casting and composite tooling.
Soft tooling for low-volume production of plastic, polyurethane, or epoxy parts.
Flexible mold making for architectural concrete, art casting, and decorative elements.
Sealing and gasketing components requiring high conformability and chemical resistance.
Functional prototypes requiring tactile feedback, vibration damping, or impact absorption.
| Chemical Type | Platinum-catalyzed addition-cure silicone elastomer |
| Product Form | Two-part liquid kit (Part A + Part B) |
| Appearance | Part A: Translucent, low-viscosity liquid; Part B: Translucent, low-viscosity liquid |
| Mix Ratio (by weight) | 1:1 |
| Cure Time (at 25 °C) | ~24 hours for full cure; tack-free in ~4–6 hours |
| Shore A Hardness (7 days, 25 °C) | 28–32 |
| Tensile Strength | ~4.5 MPa |
| Elongation at Break | ~350% |
Q1: What is the primary function of the DOWSIL EG-3100 Kit in silicone elastomer formulations?
A: The DOWSIL EG-3100 Kit is a two-component addition-cure silicone elastomer system designed to deliver high elasticity, excellent tear resistance, and low compression set in cured parts—commonly used for soft-touch overmolding, gasketing, and precision sealing applications.
Q2: Is DOWSIL EG-3100 suitable for medical or food-contact applications?
A: While DOWSIL EG-3100 is formulated for high-purity performance and exhibits low extractables after full cure, it is not pre-certified for medical device or food-contact use. Customers must conduct their own regulatory evaluation—including biocompatibility testing and compliance verification—based on final part geometry, processing conditions, and intended use.
Q3: How does the mixing ratio of Part A and Part B affect curing behavior?
A: DOWSIL EG-3100 requires precise 1:1 volumetric mixing of Part A (base) and Part B (catalyst). Deviations from this ratio may result in incomplete cure, reduced mechanical properties, or surface tackiness. Consistent metering and thorough mixing are critical to achieving optimal crosslink density and long-term stability.
Q4: Can DOWSIL EG-3100 be post-cured, and what effect does that have?
A: Yes—post-curing at elevated temperatures (e.g., 100–150 °C for 1–4 hours) is recommended to maximize crosslinking, enhance thermal stability, reduce residual catalyst activity, and improve long-term compression set resistance—particularly for demanding dynamic sealing applications.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
