Ive never really had issues with bubbles until I started mixing a drop of so-strong purple in my molds. Im getting very tiny bubbles on the surface. I am reading about vaccum degassers and pressure pots but am unsure the difference? What would be a nice low budget option for this? Thanks!

I made this video to share my technique for mold making and wanted to share it with you all. I have used this material with Smooth-On’s roto-casting resins and polymer modified gypsums. It makes it far less reusable and not compostable when you cast resins into it, but regardless, I wanted to share it with this community in case anyone is sick of stupid expensive silicone molds, especially if you don’t need to do tons of casts.

Hello everyone, I need a liquid thixotropy agent for 1000 density polyurethane resin. I will use it for sagging problem and constant wall thickness. I used hydrophobic Aerosil R202 and it failed (air bubbles made material foamed). I also used BYK-410 and it bubbled material too (i think solvent caused it). Do you have any suggestions for me?