What is the best method for mixing mold rubber?
The “Double-Mix-and Pour” Technique There are many factors that can contribute to mold rubber not curing including cold temperatures, contaminants on a model’s surface, etc. But the most common reason: inadequate mixing of Parts A & B. People mixing rubber for the first time tend to under-mix the material before applying. It is especially easy to under-mix thick materials like silicone or brush-on rubber. Mixing large volumes of material also poses the risk of inadequate mixing. Mixing Success: A Function Of Time & Technique – Time – Most mold rubbers give you plenty of time to mix and apply, so don’t worry about not having enough time. Your goal in mixing is to be thorough, not fast. Technique: Don’t Be Casual, Be Aggressive – This is where most “first timers” make the fatal mistake of using a “limp wrist”, meaning that they are not aggressive enough in mixing the rubber. Use a stiff mixing paddle and employ a firm wrist, making sure that you scrape the sides and bottom of your mixing
