Flex 50 is a medium-firm urethane rubber designed for casting flexible molds, replicating soft rubber parts, and creating durable prototypes. With a shore hardness of 50A, it provides the perfect balance between strength and flexibility, making it an excellent choice for gaskets, grips, and high-detail molds. Its low viscosity ensures superior detail reproduction, while vacuum or pressure casting is recommended for bubble-free results. Color Ivory Mixed Viscosity 550cP Mix Ratio 1:1 by weight or volume Working Time 4 min Demold Time 2 hours Cure Time 72 hr Hardness 50A Tensile Strength 250 Tear Resistance 50 Elongation % 200 Features ✅ Medium-Firm Flexibility: Shore hardness of 50A for a balance of strength and flexibility ✅ Perfect for Rubber Molds & Parts: Ideal for casting flexible molds, gaskets, and soft rubber parts ✅ Smooth, Detailed Castings: Low viscosity allows for excellent detail reproduction ✅ Customizable Colors: Mix with Alumilite translucent dyes, and add white dye for opaque colors ✅ Fast Demold Time: Ready to demold in 2 hours, full cure in 72 hours ✅ Compatible with Multiple Casting Materials: Works well with resin, concrete, plaster, and more ✅ Minimal Shrinkage: Maintains high accuracy with low linear shrinkage 🚫 Not as rigid as higher shore rubbers like Flex 70 or 80
