Reviews: Guide to Inhibiting Cure of Addition-Cure Silicone in 3D Printed Molds (16 comments)

I have also encountered a similar issue, and my solution is to apply a separating agent on the surface of the clear resin, then pour platinum-cured silicone on top. After heating at 60°C (140°F) for 12 hours, I can easily separate them.

I suggest purchasing a bottle of acrylic clear coat and applying a spray treatment to it. Afterward, heat the mold surface to ensure complete curing of the clear coat. Typically, this process should be repeated two to three times. This can solve the issue of inhibition between platinum-cure silicone and the curing of the resin.

I use a 3D printer to build molds with UV resin. After cleaning the surface of the mold, I pour clear silicone into the mold. However, after 24 hours under ambient conditions, the interface between the resin surface and the silicone remains tacky.

I have achieved success. Here are my steps: 1. Cleaning: Clean for 5 minutes in an ultrasonic cleaner with 91% IPA. 2. Curing: Air dry for 3 hours. 3. Baking: Bake at about 80 °C for 6 hours. 4. Repeat the above steps once.

Baking the 3D-printed molds in an oven helps in evaporating the uncured components on the surface of the model. Begin by subjecting the 3D printed resin model to ultrasonic treatment in isopropyl alcohol (IPA), followed by drying it and placing it in a 60°C oven for overnight baking.

I have been trying to cast molds using 3D-printed models, but the silicone is not curing. I have attempted curing it at various temperatures, but it still does not solidify.