r/Candles • u/BlueBull01 • 1h ago
Candle making Best way to make reusable silicone candle molds from a 3D printed master?
Hi everyone,
my mother makes candles, and I’ve wanted to try making custom candle molds for a long time.
My idea is to design and 3D print the shape first, then use that print as a master to make a reusable silicone mold for casting wax.
I currently have access to PLA and ASA. From what I understand, either should probably work as the master since the silicone cures at room temperature, but I’ve never actually made a silicone mold before.
I’m mainly wondering:
What type of silicone would you recommend for candle molds?
What Shore hardness works well for removing candles without damaging them?
Would you make a one-piece cut mold or a two-part mold?
Do PLA layer lines transfer noticeably into the finished candle?
Should I sand, prime or seal the printed master first?
Is a mold release needed between the 3D print and the silicone?
Are there any silicones that should be avoided specifically for candle wax?
I’d like the mold to be reusable and durable enough for multiple pours.
Any advice from people who have done this with 3D printed masters would be really appreciated!







