Vacuum Casting Service
with Mastars
Injection-molded quality and finish, without the associated costs or lead times.
Vacuum Casting Service
Vacuum casting produces production-grade rigid, flexible, and rubber parts using 3D-printed master patterns and silicone moulds, enabling short-run manufacturing of parts up to 2300 mm long. Finished part dimensions depend on master model accuracy, geometry, and casting material.
Ideal for parts requiring color, surface quality, and toughness, vacuum casting serves as a low-volume alternative to insert moulding, supports diverse materials, and acts as bridge tooling between 3D printing and injection moulding (balancing quality, cost, and time). Parts can also be clear, color-matched, painted, or fitted with inserts.
Vacuum Casting Applications
Industries
Low-volume production
Vacuum cast parts suit low-quantity production (injection mold tooling unjustified) and first-run parts—available weeks prior to production tooling completion.
Advanced prototyping
Vacuum casting’s low-cost tooling and process simplicity make design modifications easy and economical—plus, the same mold works with multiple materials for versatile design testing.
Market testing
Vaccum Casting Post-Processing Options
As cast
As-cast parts preserve the natural surface texture and appearance of the casting mold.
Final result:
Matte or grainy surface
May feature minor imperfections and irregularities
Metallisation
Mirror polishing
Smooth
Smooth finishes come from polishing/grinding the master model to erase 3D printing/CNC marks and imperfections, delivering a uniform, blemish-free surface.
Spray painting
Material Options
ABS Grade Materials
PC Grade Materials
PP Grade Materials
PP Grade Materials
Materials Gallery
View the hundreds of materials available at Protolabs through all of our service lines.
Quick links
Technical video
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Manufacturing on Demand
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