Siraya Tech Silicone - Defiant 25

Siraya Tech Silicone Defiant 25 is a platinum-cure silicone mold-making kit, designed to work particularly well with 3D printed UV resin masters. With a Shore 25A hardness, it offers a balanced blend of flexibility and strength for precise and durable molds. Defiant 25 is formulated to resist cure inhibition from UV resins, so molds reliably cure without the need for special coatings. The silicone is easy to mix and pour with a simple 1:1 ratio. Customers can choose between a 1kg kit (Part A 500g + Part B 500g) and a 2kg kit (Part A 1000g + Part B 1000g). After proper curing, it is FDA compliant for food contact, making it suitable for both crafting and food-grade molds.

Key Features

• Platinum-cure silicone with 25A Shore hardness for durable, flexible molds
• Increased resistance to cure inhibition from UV resin prints
• Available in 1kg (A 500g + B 500g) and 2kg (A 1000g + B 1000g) kit sizes.
• Simple 1:1 mixing ratio for easy, consistent use.
• Low viscosity for smooth pouring and easy bubble release.
• High tear strength and heat resistance up to approximately 200 °C.

Reliable Platinum Silicone for UV Resin Masters

Defiant 25 was designed to address a common problem in mold-making: platinum silicone cure inhibition caused by UV resin prints. The formula is highly resistant to this effect, so molds cure cleanly and consistently with minimal extra steps.

Stable 25A Shore Feel

With a Shore 25A hardness, the silicone is flexible enough for easy demolding while still retaining fine detail and shape. This is a practical and versatile hardness suitable for most casting and crafting projects.

Easy To Mix, Kit Sizes, And Pour

The kit utilizes a simple 1:1 mixing ratio by weight or volume. Customers can choose between a 1kg kit (Part A 500g + Part B 500g) and a 2kg kit (Part A 1000g + Part B 1000g). The low viscosity allows for easy penetration into even the finest details and simplifies bubble release, even without a vacuum chamber.

Durable and Heat-Resistant Molds

Defiant 25 offers high tear strength for repeated use and withstands high temperatures (up to approximately 200 °C), making it suitable for casting resin, wax, soap, candles, and more.

Food Safe Applications

After proper curing, Defiant 25 meets FDA requirements for food safety, enabling the creation of molds for chocolate, candies, baked goods, and other culinary uses, in addition to regular crafting applications.