Silicon/concrete mold for candleholders and other stuff

Made from bottom up but the principal is not new. I've put some descriptions on the files and underneath. 

I've attached a candle-holder with room for a wick-holder ready to print that fits the model. It's possible to emboss it if you want. Also made an untested candle mold you can try out instead of pouring directly into the concrete (you'll have to make a separate silicone model).

But basically: 

0: WEAR APPROPRIATE PPA FOR EVERYTHING and cover up work area. 

1: The shape is made to hold together with friction to the bottom with a regular PLA-print. Worked with mine. There might be a little seeping of silicone but it'll stay. USE PROTECTION UNDERNEATH, a baking mat/silicon is fine. 

2: Glue your thing lightly to bottom with opening up, turn silicon around when casting. Funnel is optional but recommended. 

3: Put together, use M4 screws and tighten. Important: use all side screw holes when casting silicon or clamp well in top and bottom. Tighten as needed with concrete casting.

4: pour your silicon. Approx. 3dl (that's about what I used). It makes a nice sturdy mold that is nice and reversible. 

5: Wait 3 hours. (I know it says 1 hour but give it some time)

6: mix hobby concrete 4:1 in weight ratio, I mixed 1dl water and 400g concrete and I think I only needed half. 

7: Wait a day. 

8: Open up screws, pull UP, then take apart sides, then invert silicon mold. TADA! =D You can now add a wick and pour hot candle wax into the concrete thing. 

9: Take care with flames. Never walk away from a burning fire. 

edit: new candle-files. bit short in the bottom.