ShinEtsu KE-1603 A&B is a high-performance, two-component addition-cure room-temperature vulcanizing (RTV) silicone rubber formulated for clear, precision mold making. Designed for complex geometries and fine detail reproduction, this transparent silicone cures with low shrinkage and exceptional tensile strength, making it ideal for casting resins, waxes, and art materials. Its 1:1 mix ratio and adjustable work time simplify handling, while its clarity allows visual inspection of the casting process.

• Model: KE-1603 A&B

• Curing Type: Two-component addition cure (platinum-catalyzed RTV-2)

• Mix Ratio (A:B): 1:1 by weight

• Pot Life (Workable Time at 23°C): ~90 minutes

• Full Cure Time (at 23°C): 24 hours

• Hardness (Shore A): 28

• Tensile Strength: 3.5 MPa

• Linear Shrinkage: ≤0.5%

• Appearance: Colorless/transparent liquid

• Recommended Applications: Resin casting, art molds, detail reproduction

• 100% transparent, clear cured rubber for visual mold inspection and precision detail visibility

• Low shrinkage (≤0.5%) for accurate reproduction of complex shapes and fine textures

• High tensile strength (3.5 MPa) and tear resistance for durable, reusable molds

• 1:1 mix ratio for easy, error-free handling and consistent results

• Long pot life (90 minutes) for large or complex mold-making projects

• Addition-cure formula with no exothermic reaction, safe for delicate master patterns

• No inhibition issues with most resins, waxes, and casting materials

• Precision mold making for resin art, figurines, and crafts

• Casting of epoxy resin, polyurethane resin, and waxes

• Reproduction of intricate textures, wood grain, and fine details

• Hobbyist and industrial mold making for high-detail projects

• Transparent molds for educational models and design prototyping