Alumilite Flex 50 Flexible Urethane Rubber 32oz, Flexible Resin

Description

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.

What is Flex 50 used for?

✅ Flex 50 is great for making flexible rubber molds and replicating soft rubber parts for applications like prototyping, gaskets, and craft projects. It works well with resin, concrete, plaster, and other casting materials.

How flexible is Flex 50?

? With a shore hardness of 50A, Flex 50 provides a balanced mix of durability and flexibility, making it softer than Flex 70 but still tough enough for high-quality castings.

Do I need a vacuum or pressure chamber?

? While it's not required, using a vacuum or pressure casting setup helps eliminate air bubbles, ensuring smooth, detailed results every time.

Can I add color to Flex 50?

? Absolutely! Use Alumilite’s translucent dyes to tint your castings, but if you need an opaque finish, be sure to mix in white dye.

How long does Flex 50 take to cure?

⏳ You can demold in 2 hours at room temperature, though full cure takes 72 hours.

How should I store my urethanes to keep them in the best condition?

❄️ Store your urethanes in a cool, dark place away from direct sunlight and high temperatures, ideally between 60°F and 75°F (15°C to 24°C). Keep the container tightly sealed to prevent moisture and air from affecting the formula. Wiping the container tops before sealing can help prevent stuck caps.

What are the best conditions for pouring and displaying urethane projects?

☀️ For the best results, pour urethanes in a well-ventilated, temperature-controlled environment with humidity below 60% to prevent defects and bubbles. Once cured, keep finished projects out of direct sunlight to prevent discoloration or degradation.