Siraya Tech Platinum Silicone - Defiant 25 User Manual

Welcome to the Siraya Tech Defiant 25 User Guide!

This guide to be an engaging and accessible resource for users of all skill levels. So, whether you're new to mold-making/3D printing or a seasoned pro, we're confident that you'll find this guide helpful and easy to follow.

Let's dive in!

Defiant 25 Features

• Hardness index of Shore 25A.
• Exceptional resistance to silicone poisoning, especially from UV resin.
• Minimal post-processing required for proper mold curing.
• Ideal balance of hardness and flexibility for general molding applications.
• FDA Food Safe.
• Outstanding material strength, including tear and heat resistance.
• Resin Selection and Post-Processing: Essential for 3D UV Resin Prints.

Compatible resin selection for Defiant 25

(critical for working with 3D UV resin prints)

Defiant 25 is a popular choice for those working with 3D printing UV resin to make mold kits.

We recommend using our ABS-like resin Fast, High Resolution Resins Build, Tough resin Blu, and High temp resin Sculpt, as no coating is needed after testing.

Resin Master Model Post-processing

To use resins with Defiant 25 silicone ideally, we recommend the following steps:

• Step 1:

Clean your print with 90%+ IPA or Ethanol. Remove uncured resin by hand or using an ultrasonic bath (5 minutes). A hair-based brush is helpful for thicker resins. Consider using two baths: one dirty and one clean. The goal is to remove all uncured resins.

• Step 2:

Dry your print completely: A hairdryer works well for this step.

• Step 3:

Submerge your print in water: Find a clean, transparent bucket, fill it with water, and fully submerge your print.

• Step 4:

Cure your submerged print for 30 minutes. This is a critical step for ensuring Defiant 25 works perfectly with the resin prints.

• Notes for Step 4:
• Cure your print for 30 minutes while it's submerged in water.
• Do not use sunlight to cure; use a UV-curing light fixture instead.
• For models with deep recesses or areas where water might be trapped inside, you can repeat the above step by replacing the water and then submerging the part again to cure for an additional 30 minutes.
• Models with deep features and many openings may require more time to prepare the print with this water curing method.

• Step 5:

Dry your print once more: Use a low heat oven set to 45C for 10 minutes.

• Step 6:

Your print is now ready for use with Defiant 25 silicone!

Note: We cannot guarantee performance when using Defiant 25 with other resins, including 3rd party resins. They may work with Defiant, but we do not have test data.

Defiant 25 Using Steps

（Make sure to follow the Resin selection guidelines and Resin Post-Processing above if using a resin print as a master model.）

The use of Defiant 25 silicone itself is the same as most 1:1, two-part platinum silicone.

• Step 1

Prepare 2 clean containers for pouring. Glass container is preferred since it is known not to inhibit platinum silicone from curing.

• Step 2:

Mix Part A while it is in the bottle. This is important to sure part A consistency as some of the part A may have settled during transportation and storage. This is done by opening the bottle and putting a mixing stick inside to turn and mix.

• Step 3:

Mix Part B while it is in the bottle, the same as in step 2.

• Step 4:

Weight the empty container on a scale. And use the tare function to set the scale to 0.

• Step 5:

The mix ratio is 1:1 by weight. Pour the desired amount by weight of part A into the container. Let’s say you need 500g of silicone, then pour 250g of part A into the container.

• Step 6:

Then pour the desired amount by weight of part B into the container. Let’s say you need 500g of silicone, then pour 250g of part B into the container. The scale should show 500g now.

• Step 7:

Mix parts A and B thoroughly, scraping the wall and the bottom of the container.

• Step 8:

Defiant A does release bubble rather quickly, but to ensure the best results, it is still a good idea to degas.

• Step 9:

Pour or brush to make a mold.

Recommendations：

• Pot life is about 15 minutes
• Fully cures in 4 - 6 hours
• Ambient temperature at 25C

Technical Data for Defiant 25

Appearance	Translucent
Hardness (Shore A)	25
Tensile strength (Mpa)	6
Tear strength (K N/m)	20
Shrinkage Rate (%)	0.1
Density (g/cm3)	1.12
Elongation (%)	850

 

Some demonstration videos to help with usage

This Defiant 25 Silicone application video from Robert Tolone can help get you started incredibly!

Marina Sharp also has a great step-by-step video for reference. (this video did not degas but you may need to)