What variables will help determine which mold rubber is right for my candle making project?
1. Melting temperature of your wax – Urethane Rubber – if your using wax that melts at between 130 F / C and 200 F / C, professional candle makers will choose a urethane rubber like PMC-744. Advantages; easy to use and economical. Disadvantages; urethane rubber is adhesive and will stick to most original models and some casting waxes. Using sealing agents and release agents in conjunction with urethane rubber is unavoidable. Silicone Rubber – if you are using wax that melts above 200 F / C, silicone rubber is your best choice. Advantages; Silicone rubber resists higher temperatures vs. urethane rubber and will last longer in production. Also, silicone rubber does not stick to many surfaces so sealing agents and release agents are often not required. Disadvantages; Silicone rubbers tend to be more expensive than urethane rubbers. Also, silicone rubbers that offer high tear resistance require special processing equipment in order to successfully use the material. Specifically, an accurat
1. Melting temperature of your wax – Urethane Rubber – if your using wax that melts at between 130 F / C and 200 F / C, professional candle makers will choose a urethane rubber like PMC-744. Advantages; easy to use and economical. Disadvantages; urethane rubber is adhesive and will stick to most original models and some casting waxes. Using sealing agents and release agents in conjunction with urethane rubber is unavoidable. Silicone Rubber – if you are using wax that melts above 200 F / C, silicone rubber is your best choice. Advantages; Silicone rubber resists higher temperatures vs. urethane rubber and will last longer in production. Also, silicone rubber does not stick to many surfaces so sealing agents and release agents are often not required. Disadvantages; Silicone rubbers tend to be more expensive than urethane rubbers. Also, silicone rubbers that offer high tear resistance require special processing equipment in order to successfully use the material. Specifically, an accurat
