Paving Stone mold 1/20

thingiverse

I'm creating molds for 1/20 scale paving stones in various models for clay or concrete. I use a 10 shore hardness rtv2 silicon and get very nice results. I also provide the concrete mix ratios below. If you'd like to make changes, I can include the SketchUp file. Check out my profile for more building material molds. Cement 6* Marble dust 3* Grout (tile fill) 1* Water 4* Important: Before casting with rtv2, apply a mold release spray. After casting, use vibration to prevent air bubbles from forming. Do not remove the cast before 24 hours and keep it moist by spraying water regularly. Water is crucial - don't let it dry out for a few days. It can take up to a week for the cast to harden completely.