Make your silicone mold

Upload your sculpt. You get a free 3D preview of the mold, then pay once to download print-ready STL files.

The Mold Maker is in beta. We're improving it all the time, so things may change. Always check your preview before paying, and tell us if anything looks wrong.

Drop your STL, OBJ or PLY here
or click to choose a file

What are you making?

Pick one and we fill in the best settings. You can still change them below.

Mold type

Pour castCore, funnel & vents. Exact wall thickness. Brush-onOpen shell mold you paint silicone into. Solid · simple shapesGems, charms, pendants, coasters. The cast is solid, no core.

Where is the skin open?

Front = the side facing you in Blender's front view. The 3D preview shows the result.

Silicone thickness (mm)

File units

Up axis

Real size, optional: tallest side in mm

Leave empty if your file already has the right size.

I own this model or have the right to make molds of it.

Building your preview…

Your mold preview

Adjust the mold

Seam style Split direction

0°

The yellow plane in the 3D view shows where the mold will split.

Automatic (fewest undercuts) Seam smoothing (mm) higher = straighter seam

Move the opening cut (mm, + = up) Silicone thickness (mm)

More options (precise settings)

Same settings as the Blender add-on. All sizes in mm. Leave them as they are if you're not sure.

Your 3D printer

Parts bigger than this are split into pieces with pin holes, ready to glue.

Width

Depth

Height

Solid block mold

Wall around the model

Base / top thickness

Pour hole Ø (two-part)

Air vents (two-part, 0–2)

Shell & flange

Shell wall

Flange width

Flange thickness (each half)

Bolt spacing

Bolt holes

Pour funnel & air vents

Pour hole Ø

Funnel cup Ø

Funnel height above top

Tube wall

Max air vents

Vent Ø

Air-trap search radius

Core base plate

Plate thickness

Centering ring height

Ring clearance

Fill a hollow at the open end (mold follows the outside only)

Technical report

Print-ready STL files

I want my files straight away and understand that I lose my 14-day right to cancel once the download is made available. I agree to the Mold Maker terms.

Secure card payment by Stripe. Your files are built at full quality right after payment.

Your reference:

Your mold is ready

Download the zip with both mold halves, the core, a build report and casting instructions. Bookmark this page — the download stays available for 14 days.

Your reference (for support or refunds):

Something went wrong

Still stuck? Email us with this reference: